├── CoreImageConvolutionExplorer.xcodeproj
    ├── project.pbxproj
    ├── project.xcworkspace
    │   └── contents.xcworkspacedata
    └── xcuserdata
    │   └── simongladman.xcuserdatad
    │       └── xcschemes
    │           ├── CoreImageConvolutionExplorer.xcscheme
    │           └── xcschememanagement.plist
├── CoreImageConvolutionExplorer
    ├── AppDelegate.swift
    ├── Assets.xcassets
    │   └── AppIcon.appiconset
    │   │   └── Contents.json
    ├── Base.lproj
    │   ├── LaunchScreen.storyboard
    │   └── Main.storyboard
    ├── Info.plist
    ├── ViewController.swift
    ├── components
    │   ├── ConvolutionImageViewer.swift
    │   ├── KernelDetailView.swift
    │   └── KernelsTableView.swift
    ├── model
    │   └── CoreImageConvolutionExplorerModel.swift
    ├── railroad.jpg
    └── screenshot.PNG
└── README.md


/CoreImageConvolutionExplorer.xcodeproj/project.pbxproj:
--------------------------------------------------------------------------------
  1 | // !$*UTF8*$!
  2 | {
  3 | 	archiveVersion = 1;
  4 | 	classes = {
  5 | 	};
  6 | 	objectVersion = 46;
  7 | 	objects = {
  8 | 
  9 | /* Begin PBXBuildFile section */
 10 | 		3E2760C01CA96E3400C71B50 /* screenshot.PNG in Resources */ = {isa = PBXBuildFile; fileRef = 3E2760BF1CA96E3400C71B50 /* screenshot.PNG */; };
 11 | 		3E9CD4FB1C9B0C3D00C67CB5 /* ConvolutionImageViewer.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3E9CD4FA1C9B0C3D00C67CB5 /* ConvolutionImageViewer.swift */; };
 12 | 		3E9DEFB71CA3D3E700F9F241 /* railroad.jpg in Resources */ = {isa = PBXBuildFile; fileRef = 3E9DEFB61CA3D3E700F9F241 /* railroad.jpg */; };
 13 | 		3EABB9B61C9AC91400170E8F /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3EABB9B51C9AC91400170E8F /* AppDelegate.swift */; };
 14 | 		3EABB9B81C9AC91400170E8F /* ViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3EABB9B71C9AC91400170E8F /* ViewController.swift */; };
 15 | 		3EABB9BB1C9AC91400170E8F /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 3EABB9B91C9AC91400170E8F /* Main.storyboard */; };
 16 | 		3EABB9BD1C9AC91400170E8F /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 3EABB9BC1C9AC91400170E8F /* Assets.xcassets */; };
 17 | 		3EABB9C01C9AC91400170E8F /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 3EABB9BE1C9AC91400170E8F /* LaunchScreen.storyboard */; };
 18 | 		3EABB9CB1C9AC9CD00170E8F /* KernelsTableView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3EABB9CA1C9AC9CD00170E8F /* KernelsTableView.swift */; };
 19 | 		3EABB9CE1C9ACA9600170E8F /* CoreImageConvolutionExplorerModel.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3EABB9CD1C9ACA9600170E8F /* CoreImageConvolutionExplorerModel.swift */; };
 20 | 		3EABB9D01C9AD17C00170E8F /* KernelDetailView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3EABB9CF1C9AD17C00170E8F /* KernelDetailView.swift */; };
 21 | /* End PBXBuildFile section */
 22 | 
 23 | /* Begin PBXFileReference section */
 24 | 		3E2760BF1CA96E3400C71B50 /* screenshot.PNG */ = {isa = PBXFileReference; lastKnownFileType = image.png; name = screenshot.PNG; path = CoreImageConvolutionExplorer/screenshot.PNG; sourceTree = "<group>"; };
 25 | 		3E9CD4FA1C9B0C3D00C67CB5 /* ConvolutionImageViewer.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = ConvolutionImageViewer.swift; path = components/ConvolutionImageViewer.swift; sourceTree = "<group>"; };
 26 | 		3E9DEFB61CA3D3E700F9F241 /* railroad.jpg */ = {isa = PBXFileReference; lastKnownFileType = image.jpeg; path = railroad.jpg; sourceTree = "<group>"; };
 27 | 		3EABB9B21C9AC91400170E8F /* CoreImageConvolutionExplorer.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = CoreImageConvolutionExplorer.app; sourceTree = BUILT_PRODUCTS_DIR; };
 28 | 		3EABB9B51C9AC91400170E8F /* AppDelegate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };
 29 | 		3EABB9B71C9AC91400170E8F /* ViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ViewController.swift; sourceTree = "<group>"; };
 30 | 		3EABB9BA1C9AC91400170E8F /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/Main.storyboard; sourceTree = "<group>"; };
 31 | 		3EABB9BC1C9AC91400170E8F /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
 32 | 		3EABB9BF1C9AC91400170E8F /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/LaunchScreen.storyboard; sourceTree = "<group>"; };
 33 | 		3EABB9C11C9AC91400170E8F /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 34 | 		3EABB9CA1C9AC9CD00170E8F /* KernelsTableView.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = KernelsTableView.swift; path = components/KernelsTableView.swift; sourceTree = "<group>"; };
 35 | 		3EABB9CD1C9ACA9600170E8F /* CoreImageConvolutionExplorerModel.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = CoreImageConvolutionExplorerModel.swift; path = model/CoreImageConvolutionExplorerModel.swift; sourceTree = "<group>"; };
 36 | 		3EABB9CF1C9AD17C00170E8F /* KernelDetailView.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = KernelDetailView.swift; path = components/KernelDetailView.swift; sourceTree = "<group>"; };
 37 | /* End PBXFileReference section */
 38 | 
 39 | /* Begin PBXFrameworksBuildPhase section */
 40 | 		3EABB9AF1C9AC91400170E8F /* Frameworks */ = {
 41 | 			isa = PBXFrameworksBuildPhase;
 42 | 			buildActionMask = 2147483647;
 43 | 			files = (
 44 | 			);
 45 | 			runOnlyForDeploymentPostprocessing = 0;
 46 | 		};
 47 | /* End PBXFrameworksBuildPhase section */
 48 | 
 49 | /* Begin PBXGroup section */
 50 | 		3EABB9A91C9AC91400170E8F = {
 51 | 			isa = PBXGroup;
 52 | 			children = (
 53 | 				3E2760BF1CA96E3400C71B50 /* screenshot.PNG */,
 54 | 				3EABB9B41C9AC91400170E8F /* CoreImageConvolutionExplorer */,
 55 | 				3EABB9B31C9AC91400170E8F /* Products */,
 56 | 			);
 57 | 			sourceTree = "<group>";
 58 | 		};
 59 | 		3EABB9B31C9AC91400170E8F /* Products */ = {
 60 | 			isa = PBXGroup;
 61 | 			children = (
 62 | 				3EABB9B21C9AC91400170E8F /* CoreImageConvolutionExplorer.app */,
 63 | 			);
 64 | 			name = Products;
 65 | 			sourceTree = "<group>";
 66 | 		};
 67 | 		3EABB9B41C9AC91400170E8F /* CoreImageConvolutionExplorer */ = {
 68 | 			isa = PBXGroup;
 69 | 			children = (
 70 | 				3EABB9CC1C9ACA7400170E8F /* model */,
 71 | 				3EABB9C91C9AC98000170E8F /* components */,
 72 | 				3E9DEFB61CA3D3E700F9F241 /* railroad.jpg */,
 73 | 				3EABB9B51C9AC91400170E8F /* AppDelegate.swift */,
 74 | 				3EABB9B71C9AC91400170E8F /* ViewController.swift */,
 75 | 				3EABB9B91C9AC91400170E8F /* Main.storyboard */,
 76 | 				3EABB9BC1C9AC91400170E8F /* Assets.xcassets */,
 77 | 				3EABB9BE1C9AC91400170E8F /* LaunchScreen.storyboard */,
 78 | 				3EABB9C11C9AC91400170E8F /* Info.plist */,
 79 | 			);
 80 | 			path = CoreImageConvolutionExplorer;
 81 | 			sourceTree = "<group>";
 82 | 		};
 83 | 		3EABB9C91C9AC98000170E8F /* components */ = {
 84 | 			isa = PBXGroup;
 85 | 			children = (
 86 | 				3EABB9CA1C9AC9CD00170E8F /* KernelsTableView.swift */,
 87 | 				3EABB9CF1C9AD17C00170E8F /* KernelDetailView.swift */,
 88 | 				3E9CD4FA1C9B0C3D00C67CB5 /* ConvolutionImageViewer.swift */,
 89 | 			);
 90 | 			name = components;
 91 | 			sourceTree = "<group>";
 92 | 		};
 93 | 		3EABB9CC1C9ACA7400170E8F /* model */ = {
 94 | 			isa = PBXGroup;
 95 | 			children = (
 96 | 				3EABB9CD1C9ACA9600170E8F /* CoreImageConvolutionExplorerModel.swift */,
 97 | 			);
 98 | 			name = model;
 99 | 			sourceTree = "<group>";
100 | 		};
101 | /* End PBXGroup section */
102 | 
103 | /* Begin PBXNativeTarget section */
104 | 		3EABB9B11C9AC91400170E8F /* CoreImageConvolutionExplorer */ = {
105 | 			isa = PBXNativeTarget;
106 | 			buildConfigurationList = 3EABB9C41C9AC91400170E8F /* Build configuration list for PBXNativeTarget "CoreImageConvolutionExplorer" */;
107 | 			buildPhases = (
108 | 				3EABB9AE1C9AC91400170E8F /* Sources */,
109 | 				3EABB9AF1C9AC91400170E8F /* Frameworks */,
110 | 				3EABB9B01C9AC91400170E8F /* Resources */,
111 | 			);
112 | 			buildRules = (
113 | 			);
114 | 			dependencies = (
115 | 			);
116 | 			name = CoreImageConvolutionExplorer;
117 | 			productName = CoreImageConvolutionExplorer;
118 | 			productReference = 3EABB9B21C9AC91400170E8F /* CoreImageConvolutionExplorer.app */;
119 | 			productType = "com.apple.product-type.application";
120 | 		};
121 | /* End PBXNativeTarget section */
122 | 
123 | /* Begin PBXProject section */
124 | 		3EABB9AA1C9AC91400170E8F /* Project object */ = {
125 | 			isa = PBXProject;
126 | 			attributes = {
127 | 				LastSwiftUpdateCheck = 0720;
128 | 				LastUpgradeCheck = 0720;
129 | 				ORGANIZATIONNAME = "Simon Gladman";
130 | 				TargetAttributes = {
131 | 					3EABB9B11C9AC91400170E8F = {
132 | 						CreatedOnToolsVersion = 7.2.1;
133 | 					};
134 | 				};
135 | 			};
136 | 			buildConfigurationList = 3EABB9AD1C9AC91400170E8F /* Build configuration list for PBXProject "CoreImageConvolutionExplorer" */;
137 | 			compatibilityVersion = "Xcode 3.2";
138 | 			developmentRegion = English;
139 | 			hasScannedForEncodings = 0;
140 | 			knownRegions = (
141 | 				en,
142 | 				Base,
143 | 			);
144 | 			mainGroup = 3EABB9A91C9AC91400170E8F;
145 | 			productRefGroup = 3EABB9B31C9AC91400170E8F /* Products */;
146 | 			projectDirPath = "";
147 | 			projectRoot = "";
148 | 			targets = (
149 | 				3EABB9B11C9AC91400170E8F /* CoreImageConvolutionExplorer */,
150 | 			);
151 | 		};
152 | /* End PBXProject section */
153 | 
154 | /* Begin PBXResourcesBuildPhase section */
155 | 		3EABB9B01C9AC91400170E8F /* Resources */ = {
156 | 			isa = PBXResourcesBuildPhase;
157 | 			buildActionMask = 2147483647;
158 | 			files = (
159 | 				3EABB9C01C9AC91400170E8F /* LaunchScreen.storyboard in Resources */,
160 | 				3EABB9BD1C9AC91400170E8F /* Assets.xcassets in Resources */,
161 | 				3EABB9BB1C9AC91400170E8F /* Main.storyboard in Resources */,
162 | 				3E9DEFB71CA3D3E700F9F241 /* railroad.jpg in Resources */,
163 | 				3E2760C01CA96E3400C71B50 /* screenshot.PNG in Resources */,
164 | 			);
165 | 			runOnlyForDeploymentPostprocessing = 0;
166 | 		};
167 | /* End PBXResourcesBuildPhase section */
168 | 
169 | /* Begin PBXSourcesBuildPhase section */
170 | 		3EABB9AE1C9AC91400170E8F /* Sources */ = {
171 | 			isa = PBXSourcesBuildPhase;
172 | 			buildActionMask = 2147483647;
173 | 			files = (
174 | 				3EABB9CE1C9ACA9600170E8F /* CoreImageConvolutionExplorerModel.swift in Sources */,
175 | 				3EABB9D01C9AD17C00170E8F /* KernelDetailView.swift in Sources */,
176 | 				3EABB9CB1C9AC9CD00170E8F /* KernelsTableView.swift in Sources */,
177 | 				3EABB9B81C9AC91400170E8F /* ViewController.swift in Sources */,
178 | 				3E9CD4FB1C9B0C3D00C67CB5 /* ConvolutionImageViewer.swift in Sources */,
179 | 				3EABB9B61C9AC91400170E8F /* AppDelegate.swift in Sources */,
180 | 			);
181 | 			runOnlyForDeploymentPostprocessing = 0;
182 | 		};
183 | /* End PBXSourcesBuildPhase section */
184 | 
185 | /* Begin PBXVariantGroup section */
186 | 		3EABB9B91C9AC91400170E8F /* Main.storyboard */ = {
187 | 			isa = PBXVariantGroup;
188 | 			children = (
189 | 				3EABB9BA1C9AC91400170E8F /* Base */,
190 | 			);
191 | 			name = Main.storyboard;
192 | 			sourceTree = "<group>";
193 | 		};
194 | 		3EABB9BE1C9AC91400170E8F /* LaunchScreen.storyboard */ = {
195 | 			isa = PBXVariantGroup;
196 | 			children = (
197 | 				3EABB9BF1C9AC91400170E8F /* Base */,
198 | 			);
199 | 			name = LaunchScreen.storyboard;
200 | 			sourceTree = "<group>";
201 | 		};
202 | /* End PBXVariantGroup section */
203 | 
204 | /* Begin XCBuildConfiguration section */
205 | 		3EABB9C21C9AC91400170E8F /* Debug */ = {
206 | 			isa = XCBuildConfiguration;
207 | 			buildSettings = {
208 | 				ALWAYS_SEARCH_USER_PATHS = NO;
209 | 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
210 | 				CLANG_CXX_LIBRARY = "libc++";
211 | 				CLANG_ENABLE_MODULES = YES;
212 | 				CLANG_ENABLE_OBJC_ARC = YES;
213 | 				CLANG_WARN_BOOL_CONVERSION = YES;
214 | 				CLANG_WARN_CONSTANT_CONVERSION = YES;
215 | 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
216 | 				CLANG_WARN_EMPTY_BODY = YES;
217 | 				CLANG_WARN_ENUM_CONVERSION = YES;
218 | 				CLANG_WARN_INT_CONVERSION = YES;
219 | 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
220 | 				CLANG_WARN_UNREACHABLE_CODE = YES;
221 | 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
222 | 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
223 | 				COPY_PHASE_STRIP = NO;
224 | 				DEBUG_INFORMATION_FORMAT = dwarf;
225 | 				ENABLE_STRICT_OBJC_MSGSEND = YES;
226 | 				ENABLE_TESTABILITY = YES;
227 | 				GCC_C_LANGUAGE_STANDARD = gnu99;
228 | 				GCC_DYNAMIC_NO_PIC = NO;
229 | 				GCC_NO_COMMON_BLOCKS = YES;
230 | 				GCC_OPTIMIZATION_LEVEL = 0;
231 | 				GCC_PREPROCESSOR_DEFINITIONS = (
232 | 					"DEBUG=1",
233 | 					"$(inherited)",
234 | 				);
235 | 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
236 | 				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
237 | 				GCC_WARN_UNDECLARED_SELECTOR = YES;
238 | 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
239 | 				GCC_WARN_UNUSED_FUNCTION = YES;
240 | 				GCC_WARN_UNUSED_VARIABLE = YES;
241 | 				IPHONEOS_DEPLOYMENT_TARGET = 9.2;
242 | 				MTL_ENABLE_DEBUG_INFO = YES;
243 | 				ONLY_ACTIVE_ARCH = YES;
244 | 				SDKROOT = iphoneos;
245 | 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
246 | 				TARGETED_DEVICE_FAMILY = 2;
247 | 			};
248 | 			name = Debug;
249 | 		};
250 | 		3EABB9C31C9AC91400170E8F /* Release */ = {
251 | 			isa = XCBuildConfiguration;
252 | 			buildSettings = {
253 | 				ALWAYS_SEARCH_USER_PATHS = NO;
254 | 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
255 | 				CLANG_CXX_LIBRARY = "libc++";
256 | 				CLANG_ENABLE_MODULES = YES;
257 | 				CLANG_ENABLE_OBJC_ARC = YES;
258 | 				CLANG_WARN_BOOL_CONVERSION = YES;
259 | 				CLANG_WARN_CONSTANT_CONVERSION = YES;
260 | 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
261 | 				CLANG_WARN_EMPTY_BODY = YES;
262 | 				CLANG_WARN_ENUM_CONVERSION = YES;
263 | 				CLANG_WARN_INT_CONVERSION = YES;
264 | 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
265 | 				CLANG_WARN_UNREACHABLE_CODE = YES;
266 | 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
267 | 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
268 | 				COPY_PHASE_STRIP = NO;
269 | 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
270 | 				ENABLE_NS_ASSERTIONS = NO;
271 | 				ENABLE_STRICT_OBJC_MSGSEND = YES;
272 | 				GCC_C_LANGUAGE_STANDARD = gnu99;
273 | 				GCC_NO_COMMON_BLOCKS = YES;
274 | 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
275 | 				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
276 | 				GCC_WARN_UNDECLARED_SELECTOR = YES;
277 | 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
278 | 				GCC_WARN_UNUSED_FUNCTION = YES;
279 | 				GCC_WARN_UNUSED_VARIABLE = YES;
280 | 				IPHONEOS_DEPLOYMENT_TARGET = 9.2;
281 | 				MTL_ENABLE_DEBUG_INFO = NO;
282 | 				SDKROOT = iphoneos;
283 | 				TARGETED_DEVICE_FAMILY = 2;
284 | 				VALIDATE_PRODUCT = YES;
285 | 			};
286 | 			name = Release;
287 | 		};
288 | 		3EABB9C51C9AC91400170E8F /* Debug */ = {
289 | 			isa = XCBuildConfiguration;
290 | 			buildSettings = {
291 | 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
292 | 				INFOPLIST_FILE = CoreImageConvolutionExplorer/Info.plist;
293 | 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
294 | 				PRODUCT_BUNDLE_IDENTIFIER = uk.co.flexmonkey.CoreImageConvolutionExplorer;
295 | 				PRODUCT_NAME = "$(TARGET_NAME)";
296 | 			};
297 | 			name = Debug;
298 | 		};
299 | 		3EABB9C61C9AC91400170E8F /* Release */ = {
300 | 			isa = XCBuildConfiguration;
301 | 			buildSettings = {
302 | 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
303 | 				INFOPLIST_FILE = CoreImageConvolutionExplorer/Info.plist;
304 | 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
305 | 				PRODUCT_BUNDLE_IDENTIFIER = uk.co.flexmonkey.CoreImageConvolutionExplorer;
306 | 				PRODUCT_NAME = "$(TARGET_NAME)";
307 | 			};
308 | 			name = Release;
309 | 		};
310 | /* End XCBuildConfiguration section */
311 | 
312 | /* Begin XCConfigurationList section */
313 | 		3EABB9AD1C9AC91400170E8F /* Build configuration list for PBXProject "CoreImageConvolutionExplorer" */ = {
314 | 			isa = XCConfigurationList;
315 | 			buildConfigurations = (
316 | 				3EABB9C21C9AC91400170E8F /* Debug */,
317 | 				3EABB9C31C9AC91400170E8F /* Release */,
318 | 			);
319 | 			defaultConfigurationIsVisible = 0;
320 | 			defaultConfigurationName = Release;
321 | 		};
322 | 		3EABB9C41C9AC91400170E8F /* Build configuration list for PBXNativeTarget "CoreImageConvolutionExplorer" */ = {
323 | 			isa = XCConfigurationList;
324 | 			buildConfigurations = (
325 | 				3EABB9C51C9AC91400170E8F /* Debug */,
326 | 				3EABB9C61C9AC91400170E8F /* Release */,
327 | 			);
328 | 			defaultConfigurationIsVisible = 0;
329 | 			defaultConfigurationName = Release;
330 | 		};
331 | /* End XCConfigurationList section */
332 | 	};
333 | 	rootObject = 3EABB9AA1C9AC91400170E8F /* Project object */;
334 | }
335 | 


--------------------------------------------------------------------------------
/CoreImageConvolutionExplorer.xcodeproj/project.xcworkspace/contents.xcworkspacedata:
--------------------------------------------------------------------------------
1 | <?xml version="1.0" encoding="UTF-8"?>
2 | <Workspace
3 |    version = "1.0">
4 |    <FileRef
5 |       location = "self:CoreImageConvolutionExplorer.xcodeproj">
6 |    </FileRef>
7 | </Workspace>
8 | 


--------------------------------------------------------------------------------
/CoreImageConvolutionExplorer.xcodeproj/xcuserdata/simongladman.xcuserdatad/xcschemes/CoreImageConvolutionExplorer.xcscheme:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <Scheme
 3 |    LastUpgradeVersion = "0720"
 4 |    version = "1.3">
 5 |    <BuildAction
 6 |       parallelizeBuildables = "YES"
 7 |       buildImplicitDependencies = "YES">
 8 |       <BuildActionEntries>
 9 |          <BuildActionEntry
10 |             buildForTesting = "YES"
11 |             buildForRunning = "YES"
12 |             buildForProfiling = "YES"
13 |             buildForArchiving = "YES"
14 |             buildForAnalyzing = "YES">
15 |             <BuildableReference
16 |                BuildableIdentifier = "primary"
17 |                BlueprintIdentifier = "3EABB9B11C9AC91400170E8F"
18 |                BuildableName = "CoreImageConvolutionExplorer.app"
19 |                BlueprintName = "CoreImageConvolutionExplorer"
20 |                ReferencedContainer = "container:CoreImageConvolutionExplorer.xcodeproj">
21 |             </BuildableReference>
22 |          </BuildActionEntry>
23 |       </BuildActionEntries>
24 |    </BuildAction>
25 |    <TestAction
26 |       buildConfiguration = "Debug"
27 |       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
28 |       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
29 |       shouldUseLaunchSchemeArgsEnv = "YES">
30 |       <Testables>
31 |       </Testables>
32 |       <MacroExpansion>
33 |          <BuildableReference
34 |             BuildableIdentifier = "primary"
35 |             BlueprintIdentifier = "3EABB9B11C9AC91400170E8F"
36 |             BuildableName = "CoreImageConvolutionExplorer.app"
37 |             BlueprintName = "CoreImageConvolutionExplorer"
38 |             ReferencedContainer = "container:CoreImageConvolutionExplorer.xcodeproj">
39 |          </BuildableReference>
40 |       </MacroExpansion>
41 |       <AdditionalOptions>
42 |       </AdditionalOptions>
43 |    </TestAction>
44 |    <LaunchAction
45 |       buildConfiguration = "Debug"
46 |       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
47 |       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
48 |       launchStyle = "0"
49 |       useCustomWorkingDirectory = "NO"
50 |       ignoresPersistentStateOnLaunch = "NO"
51 |       debugDocumentVersioning = "YES"
52 |       debugServiceExtension = "internal"
53 |       allowLocationSimulation = "YES">
54 |       <BuildableProductRunnable
55 |          runnableDebuggingMode = "0">
56 |          <BuildableReference
57 |             BuildableIdentifier = "primary"
58 |             BlueprintIdentifier = "3EABB9B11C9AC91400170E8F"
59 |             BuildableName = "CoreImageConvolutionExplorer.app"
60 |             BlueprintName = "CoreImageConvolutionExplorer"
61 |             ReferencedContainer = "container:CoreImageConvolutionExplorer.xcodeproj">
62 |          </BuildableReference>
63 |       </BuildableProductRunnable>
64 |       <AdditionalOptions>
65 |       </AdditionalOptions>
66 |    </LaunchAction>
67 |    <ProfileAction
68 |       buildConfiguration = "Release"
69 |       shouldUseLaunchSchemeArgsEnv = "YES"
70 |       savedToolIdentifier = ""
71 |       useCustomWorkingDirectory = "NO"
72 |       debugDocumentVersioning = "YES">
73 |       <BuildableProductRunnable
74 |          runnableDebuggingMode = "0">
75 |          <BuildableReference
76 |             BuildableIdentifier = "primary"
77 |             BlueprintIdentifier = "3EABB9B11C9AC91400170E8F"
78 |             BuildableName = "CoreImageConvolutionExplorer.app"
79 |             BlueprintName = "CoreImageConvolutionExplorer"
80 |             ReferencedContainer = "container:CoreImageConvolutionExplorer.xcodeproj">
81 |          </BuildableReference>
82 |       </BuildableProductRunnable>
83 |    </ProfileAction>
84 |    <AnalyzeAction
85 |       buildConfiguration = "Debug">
86 |    </AnalyzeAction>
87 |    <ArchiveAction
88 |       buildConfiguration = "Release"
89 |       revealArchiveInOrganizer = "YES">
90 |    </ArchiveAction>
91 | </Scheme>
92 | 


--------------------------------------------------------------------------------
/CoreImageConvolutionExplorer.xcodeproj/xcuserdata/simongladman.xcuserdatad/xcschemes/xcschememanagement.plist:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 3 | <plist version="1.0">
 4 | <dict>
 5 | 	<key>SchemeUserState</key>
 6 | 	<dict>
 7 | 		<key>CoreImageConvolutionExplorer.xcscheme</key>
 8 | 		<dict>
 9 | 			<key>orderHint</key>
10 | 			<integer>0</integer>
11 | 		</dict>
12 | 	</dict>
13 | 	<key>SuppressBuildableAutocreation</key>
14 | 	<dict>
15 | 		<key>3EABB9B11C9AC91400170E8F</key>
16 | 		<dict>
17 | 			<key>primary</key>
18 | 			<true/>
19 | 		</dict>
20 | 	</dict>
21 | </dict>
22 | </plist>
23 | 


--------------------------------------------------------------------------------
/CoreImageConvolutionExplorer/AppDelegate.swift:
--------------------------------------------------------------------------------
 1 | //
 2 | //  AppDelegate.swift
 3 | //  CoreImageConvolutionExplorer
 4 | //
 5 | //  Created by Simon Gladman on 17/03/2016.
 6 | //  Copyright © 2016 Simon Gladman. All rights reserved.
 7 | //
 8 | 
 9 | import UIKit
10 | 
11 | @UIApplicationMain
12 | class AppDelegate: UIResponder, UIApplicationDelegate {
13 | 
14 |     var window: UIWindow?
15 | 
16 | 
17 |     func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
18 |         // Override point for customization after application launch.
19 |         return true
20 |     }
21 | 
22 |     func applicationWillResignActive(application: UIApplication) {
23 |         // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
24 |         // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
25 |     }
26 | 
27 |     func applicationDidEnterBackground(application: UIApplication) {
28 |         // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
29 |         // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
30 |     }
31 | 
32 |     func applicationWillEnterForeground(application: UIApplication) {
33 |         // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
34 |     }
35 | 
36 |     func applicationDidBecomeActive(application: UIApplication) {
37 |         // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
38 |     }
39 | 
40 |     func applicationWillTerminate(application: UIApplication) {
41 |         // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
42 |     }
43 | 
44 | 
45 | }
46 | 
47 | 


--------------------------------------------------------------------------------
/CoreImageConvolutionExplorer/Assets.xcassets/AppIcon.appiconset/Contents.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "images" : [
 3 |     {
 4 |       "idiom" : "ipad",
 5 |       "size" : "29x29",
 6 |       "scale" : "1x"
 7 |     },
 8 |     {
 9 |       "idiom" : "ipad",
10 |       "size" : "29x29",
11 |       "scale" : "2x"
12 |     },
13 |     {
14 |       "idiom" : "ipad",
15 |       "size" : "40x40",
16 |       "scale" : "1x"
17 |     },
18 |     {
19 |       "idiom" : "ipad",
20 |       "size" : "40x40",
21 |       "scale" : "2x"
22 |     },
23 |     {
24 |       "idiom" : "ipad",
25 |       "size" : "76x76",
26 |       "scale" : "1x"
27 |     },
28 |     {
29 |       "idiom" : "ipad",
30 |       "size" : "76x76",
31 |       "scale" : "2x"
32 |     }
33 |   ],
34 |   "info" : {
35 |     "version" : 1,
36 |     "author" : "xcode"
37 |   }
38 | }


--------------------------------------------------------------------------------
/CoreImageConvolutionExplorer/Base.lproj/LaunchScreen.storyboard:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 2 | <document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="8150" systemVersion="15A204g" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES" initialViewController="01J-lp-oVM">
 3 |     <dependencies>
 4 |         <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="8122"/>
 5 |     </dependencies>
 6 |     <scenes>
 7 |         <!--View Controller-->
 8 |         <scene sceneID="EHf-IW-A2E">
 9 |             <objects>
10 |                 <viewController id="01J-lp-oVM" sceneMemberID="viewController">
11 |                     <layoutGuides>
12 |                         <viewControllerLayoutGuide type="top" id="Llm-lL-Icb"/>
13 |                         <viewControllerLayoutGuide type="bottom" id="xb3-aO-Qok"/>
14 |                     </layoutGuides>
15 |                     <view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
16 |                         <rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
17 |                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
18 |                         <animations/>
19 |                         <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
20 |                     </view>
21 |                 </viewController>
22 |                 <placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>
23 |             </objects>
24 |             <point key="canvasLocation" x="53" y="375"/>
25 |         </scene>
26 |     </scenes>
27 | </document>
28 | 


--------------------------------------------------------------------------------
/CoreImageConvolutionExplorer/Base.lproj/Main.storyboard:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 2 | <document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="6211" systemVersion="14A298i" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="BYZ-38-t0r">
 3 |     <dependencies>
 4 |         <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="6204"/>
 5 |     </dependencies>
 6 |     <scenes>
 7 |         <!--View Controller-->
 8 |         <scene sceneID="tne-QT-ifu">
 9 |             <objects>
10 |                 <viewController id="BYZ-38-t0r" customClass="ViewController" customModuleProvider="target" sceneMemberID="viewController">
11 |                     <layoutGuides>
12 |                         <viewControllerLayoutGuide type="top" id="y3c-jy-aDJ"/>
13 |                         <viewControllerLayoutGuide type="bottom" id="wfy-db-euE"/>
14 |                     </layoutGuides>
15 |                     <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
16 |                         <rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
17 |                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
18 |                         <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
19 |                     </view>
20 |                 </viewController>
21 |                 <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
22 |             </objects>
23 |         </scene>
24 |     </scenes>
25 | </document>
26 | 


--------------------------------------------------------------------------------
/CoreImageConvolutionExplorer/Info.plist:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 3 | <plist version="1.0">
 4 | <dict>
 5 | 	<key>CFBundleDevelopmentRegion</key>
 6 | 	<string>en</string>
 7 | 	<key>CFBundleExecutable</key>
 8 | 	<string>$(EXECUTABLE_NAME)</string>
 9 | 	<key>CFBundleIdentifier</key>
10 | 	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
11 | 	<key>CFBundleInfoDictionaryVersion</key>
12 | 	<string>6.0</string>
13 | 	<key>CFBundleName</key>
14 | 	<string>$(PRODUCT_NAME)</string>
15 | 	<key>CFBundlePackageType</key>
16 | 	<string>APPL</string>
17 | 	<key>CFBundleShortVersionString</key>
18 | 	<string>1.0</string>
19 | 	<key>CFBundleSignature</key>
20 | 	<string>????</string>
21 | 	<key>CFBundleVersion</key>
22 | 	<string>1</string>
23 | 	<key>LSRequiresIPhoneOS</key>
24 | 	<true/>
25 | 	<key>UILaunchStoryboardName</key>
26 | 	<string>LaunchScreen</string>
27 | 	<key>UIMainStoryboardFile</key>
28 | 	<string>Main</string>
29 | 	<key>UIRequiredDeviceCapabilities</key>
30 | 	<array>
31 | 		<string>armv7</string>
32 | 	</array>
33 | 	<key>UIRequiresFullScreen</key>
34 | 	<true/>
35 | 	<key>UISupportedInterfaceOrientations~ipad</key>
36 | 	<array>
37 | 		<string>UIInterfaceOrientationLandscapeLeft</string>
38 | 		<string>UIInterfaceOrientationLandscapeRight</string>
39 | 	</array>
40 | </dict>
41 | </plist>
42 | 


--------------------------------------------------------------------------------
/CoreImageConvolutionExplorer/ViewController.swift:
--------------------------------------------------------------------------------
 1 | //
 2 | //  ViewController.swift
 3 | //  CoreImageConvolutionExplorer
 4 | //
 5 | //  Created by Simon Gladman on 17/03/2016.
 6 | //  Copyright © 2016 Simon Gladman. All rights reserved.
 7 | //
 8 | 
 9 | import UIKit
10 | 
11 | class ViewController: UIViewController
12 | {
13 |     let kernelsTableView = KernelsTableView()
14 |     let kernelDetailView = KernelDetailView()
15 |     let convolutionImageViewer = ConvolutionImageViewer()
16 |     
17 |     override func viewDidLoad()
18 |     {
19 |         super.viewDidLoad()
20 |    
21 |         view.addSubview(kernelsTableView)
22 |         view.addSubview(kernelDetailView)
23 |         view.addSubview(convolutionImageViewer)
24 |         
25 |         kernelsTableView.addTarget(self, action: #selector(ViewController.kernelSelectionChange),
26 |             forControlEvents: .ValueChanged)
27 |     }
28 |     
29 |     func kernelSelectionChange()
30 |     {
31 |         kernelDetailView.weights = kernelsTableView.weights
32 |         convolutionImageViewer.weights = kernelsTableView.weights
33 |     }
34 |     
35 |     override func viewDidLayoutSubviews()
36 |     {
37 |         let topMargin = topLayoutGuide.length
38 |         let kernelsTableViewWidth = CGFloat(200)
39 |         let workspaceWidth = view.frame.width - kernelsTableViewWidth
40 |         let workspaceHeight = view.frame.height - topMargin
41 |         
42 |         kernelsTableView.frame = CGRect(x: 0,
43 |             y: topMargin,
44 |             width: kernelsTableViewWidth,
45 |             height: workspaceHeight).insetBy(dx: 5, dy: 0)
46 | 
47 |         kernelDetailView.frame = CGRect(x: kernelsTableViewWidth,
48 |             y: topMargin,
49 |             width: workspaceWidth / 2,
50 |             height: workspaceHeight).insetBy(dx: 5, dy: 0)
51 |         
52 |         convolutionImageViewer.frame = CGRect(x: kernelsTableViewWidth + workspaceWidth / 2,
53 |             y: topMargin,
54 |             width: workspaceWidth / 2,
55 |             height: workspaceHeight).insetBy(dx: 5, dy: 0)
56 |     }
57 | 
58 | }
59 | 
60 | 


--------------------------------------------------------------------------------
/CoreImageConvolutionExplorer/components/ConvolutionImageViewer.swift:
--------------------------------------------------------------------------------
  1 | //
  2 | //  ConvolutionImageViewer.swift
  3 | //  CoreImageConvolutionExplorer
  4 | //
  5 | //  Created by Simon Gladman on 17/03/2016.
  6 | //  Copyright © 2016 Simon Gladman. All rights reserved.
  7 | //
  8 | 
  9 | import UIKit
 10 | import GLKit
 11 | 
 12 | class ConvolutionImageViewer: UIView
 13 | {
 14 |     let railroadImage = CIImage(image: UIImage(named: "railroad.jpg")!)!
 15 |     
 16 |     let makeOpaqueKernel = CIColorKernel(string: "kernel vec4 makeOpaque(__sample pixel) { return vec4(pixel.rgb, 1.0); }")
 17 |     
 18 |     let imageView = OpenGLImageView()
 19 |     
 20 |     let biasSlider = LabelledSlider(title: "Bias",
 21 |         minimumValue: 0,
 22 |         maximumValue: 1)
 23 |     
 24 |     let normaliseButton = LabelledSwitch(title: "Normalize",
 25 |         on: true)
 26 |     
 27 |     let premultiplyButton = LabelledSwitch(title: "Premultiply",
 28 |         on: true)
 29 |     
 30 |     override init(frame: CGRect)
 31 |     {
 32 |         super.init(frame: frame)
 33 |      
 34 |         addSubview(imageView)
 35 |         addSubview(biasSlider)
 36 |         addSubview(normaliseButton)
 37 |         addSubview(premultiplyButton)
 38 |         
 39 |         imageView.image = railroadImage
 40 |         
 41 |         biasSlider.addTarget(self,
 42 |             action: #selector(ConvolutionImageViewer.applyConvolutionKernel),
 43 |             forControlEvents: .ValueChanged)
 44 |         
 45 |         normaliseButton.addTarget(self,
 46 |             action: #selector(ConvolutionImageViewer.applyConvolutionKernel),
 47 |             forControlEvents: .ValueChanged)
 48 |         
 49 |         premultiplyButton.addTarget(self,
 50 |             action: #selector(ConvolutionImageViewer.applyConvolutionKernel),
 51 |             forControlEvents: .ValueChanged)
 52 |     }
 53 | 
 54 |     required init?(coder aDecoder: NSCoder)
 55 |     {
 56 |         fatalError("init(coder:) has not been implemented")
 57 |     }
 58 |     
 59 |     override func didMoveToSuperview()
 60 |     {
 61 |         super.didMoveToSuperview()
 62 |         
 63 |         enabled = false
 64 |     }
 65 |     
 66 |     var weights: [CGFloat]?
 67 |     {
 68 |         didSet
 69 |         {
 70 |             if weights?.count != 9 && weights?.count != 25 && weights?.count != 49
 71 |             {
 72 |                 fatalError("Weights array is wrong length!")
 73 |             }
 74 |             
 75 |             enabled = weights != nil
 76 |             
 77 |             applyConvolutionKernel()
 78 |         }
 79 |     }
 80 |     
 81 |     var enabled = false
 82 |     {
 83 |         didSet
 84 |         {
 85 |             biasSlider.enabled = enabled
 86 |             normaliseButton.enabled = enabled
 87 |             alpha = enabled ? 1 : 0.5
 88 |         }
 89 |     }
 90 |     
 91 |     func normaliseWeightsArray(weights: [CGFloat]?, normalise: Bool) -> [CGFloat]?
 92 |     {
 93 |         guard let weights = weights else
 94 |         {
 95 |             return nil
 96 |         }
 97 |         
 98 |         if !normalise
 99 |         {
100 |             return weights
101 |         }
102 |         
103 |         let sum = weights.reduce(0, combine: +)
104 |         
105 |         return sum == 0 ?
106 |             weights :
107 |             weights.map({ $0 / sum })
108 |     }
109 |     
110 |     func applyConvolutionKernel()
111 |     {
112 |         guard let weights = normaliseWeightsArray(weights, normalise: normaliseButton.on) else
113 |         {
114 |             return
115 |         }
116 |         
117 |         let filterName: String
118 |         
119 |         switch weights.count
120 |         {
121 |         case 9:
122 |             filterName = "CIConvolution3X3"
123 |         case 25:
124 |             filterName = "CIConvolution5X5"
125 |         default:
126 |             filterName = "CIConvolution7X7"
127 |         }
128 |         
129 |         let weightsVector: CIVector = CIVector(values: weights, count: weights.count)
130 |         
131 |         let finalImage = railroadImage.imageByApplyingFilter(filterName,
132 |             withInputParameters: [
133 |                 kCIInputWeightsKey: weightsVector,
134 |                 kCIInputBiasKey: CGFloat(biasSlider.value)]).imageByCroppingToRect(railroadImage.extent)
135 |         
136 |         // Two seperate approaches to make opaque to mirror
137 |         // book content. The CIColorMatrix technique could
138 |         // can be replicated by chaning the `makeOpaqueKernel`'s
139 |         // code to:
140 |         //
141 |         // 'return vec4(unpremultiply(pixel).rgb, 1.0)'
142 |         if premultiplyButton.on
143 |         {
144 |             imageView.image = makeOpaqueKernel?.applyWithExtent(railroadImage.extent,
145 |                 arguments: [finalImage])
146 |         }
147 |         else
148 |         {
149 |             imageView.image = finalImage
150 |                 .imageByApplyingFilter("CIColorMatrix", withInputParameters: [ "inputBiasVector": CIVector(x: 0, y: 0, z: 0, w: 1)])
151 |             .imageByCroppingToRect(finalImage.extent)
152 |         }
153 |     }
154 |     
155 |     override func layoutSubviews()
156 |     {
157 |         imageView.frame = bounds
158 |         imageView.setNeedsDisplay()
159 |         
160 |         let buttonY = frame.height - biasSlider.intrinsicContentSize().height - normaliseButton.intrinsicContentSize().height - 20
161 |         
162 |         normaliseButton.frame = CGRect(x: 0,
163 |             y: buttonY,
164 |             width: frame.width / 2 - 5,
165 |             height: normaliseButton.intrinsicContentSize().height)
166 | 
167 |         premultiplyButton.frame = CGRect(x: frame.width / 2 + 5,
168 |             y: buttonY,
169 |             width: frame.width / 2 - 5,
170 |             height: normaliseButton.intrinsicContentSize().height)
171 |         
172 |         biasSlider.frame = CGRect(x: 0,
173 |             y: frame.height - biasSlider.intrinsicContentSize().height - 10,
174 |             width: frame.width,
175 |             height: biasSlider.intrinsicContentSize().height)
176 |     }
177 | }
178 | 
179 | // ------------------------------------------------------
180 | 
181 | // MARK: LabelledControl
182 | 
183 | class LabelledControl: UIControl
184 | {
185 |     let label = UILabel(frame: CGRectZero)
186 |     let title: String
187 |     
188 |     init(title: String)
189 |     {
190 |         self.title = title
191 | 
192 |         super.init(frame: CGRectZero)
193 | 
194 |         layer.cornerRadius = 5
195 |         layer.borderColor = UIColor.lightGrayColor().CGColor
196 |         layer.borderWidth = 1
197 | 
198 |         addSubview(label)
199 | 
200 |         updateLabel()
201 |     }
202 | 
203 |     required init?(coder aDecoder: NSCoder)
204 |     {
205 |         fatalError("init(coder:) has not been implemented")
206 |     }
207 |     
208 |     func updateLabel()
209 |     {
210 |         label.text = title
211 |     }
212 |     
213 |     override func layoutSubviews()
214 |     {
215 |         label.frame = CGRect(x: 0,
216 |             y: 0,
217 |             width: frame.width,
218 |             height: frame.midY).insetBy(dx: 5, dy: 5)
219 |     }
220 | }
221 | 
222 | // MARK: LabelledSwitch
223 | 
224 | class LabelledSwitch: LabelledControl
225 | {
226 |     private let onOffSwitch = UISwitch()
227 |     
228 |     required init(title: String, on: Bool)
229 |     {
230 |         super.init(title: title)
231 |         
232 |         onOffSwitch.on = on
233 |         
234 |         onOffSwitch.addTarget(self,
235 |             action: #selector(LabelledSwitch.switchChangeHandler),
236 |             forControlEvents: .ValueChanged)
237 |         
238 |         addSubview(onOffSwitch)
239 |     }
240 | 
241 |     required init?(coder aDecoder: NSCoder)
242 |     {
243 |         fatalError("init(coder:) has not been implemented")
244 |     }
245 |     
246 |     var on: Bool
247 |     {
248 |         set
249 |         {
250 |             onOffSwitch.on = on
251 |         }
252 |         get
253 |         {
254 |             return onOffSwitch.on
255 |         }
256 |     }
257 |     
258 |     func switchChangeHandler()
259 |     {
260 |         on = onOffSwitch.on
261 |         
262 |         sendActionsForControlEvents(.ValueChanged)
263 |     }
264 | 
265 |     override func intrinsicContentSize() -> CGSize
266 |     {
267 |         return CGSize(width: label.intrinsicContentSize().width + onOffSwitch.intrinsicContentSize().width + 10,
268 |             height: max(label.intrinsicContentSize().height, onOffSwitch.intrinsicContentSize().height) + 10)
269 |     }
270 |     
271 |     override func layoutSubviews()
272 |     {
273 |         label.frame = CGRect(x: 0,
274 |             y: 0,
275 |             width: frame.midX,
276 |             height: frame.height).insetBy(dx: 5, dy: 5)
277 |         
278 |         onOffSwitch.frame = CGRect(x: frame.width - onOffSwitch.intrinsicContentSize().width - 10,
279 |             y: 0,
280 |             width: frame.width / 2,
281 |             height: frame.height).insetBy(dx: 5, dy: 5)
282 |     }
283 | }
284 | 
285 | // MARK: LabelledSlider
286 | 
287 | class LabelledSlider: LabelledControl
288 | {
289 |     private let slider = UISlider(frame: CGRectZero)
290 |     
291 |     required init(title: String, minimumValue: Float = 0, maximumValue: Float = 1)
292 |     {
293 |         super.init(title: title)
294 |         
295 |         slider.minimumValue = minimumValue
296 |         slider.maximumValue = maximumValue
297 |         
298 |         slider.addTarget(self,
299 |             action: #selector(LabelledSlider.sliderChangeHandler),
300 |             forControlEvents: .ValueChanged)
301 | 
302 |         addSubview(slider)
303 |     }
304 | 
305 |     required init(coder aDecoder: NSCoder)
306 |     {
307 |         fatalError("init(coder:) has not been implemented")
308 |     }
309 | 
310 |     var value: Float = 0
311 |     {
312 |         didSet
313 |         {
314 |             slider.value = Float(value)
315 |             updateLabel()
316 |         }
317 |     }
318 | 
319 |     func sliderChangeHandler()
320 |     {
321 |         value = slider.value
322 |         
323 |         sendActionsForControlEvents(.ValueChanged)
324 |     }
325 |     
326 |     override func updateLabel()
327 |     {
328 |         label.text = title + ": " + (NSString(format: "%.3f", Float(value)) as String)
329 |     }
330 |     
331 |     override func intrinsicContentSize() -> CGSize
332 |     {
333 |         return CGSize(width: 100,
334 |             height: label.intrinsicContentSize().height + slider.intrinsicContentSize().height + 10)
335 |     }
336 |     
337 |     override func layoutSubviews()
338 |     {
339 |         label.frame = CGRect(x: 0,
340 |             y: 0,
341 |             width: frame.width,
342 |             height: frame.height / 2).insetBy(dx: 5, dy: 5)
343 |         
344 |         slider.frame = CGRect(x: 0,
345 |             y: frame.height / 2,
346 |             width: frame.width,
347 |             height: frame.height / 2).insetBy(dx: 5, dy: 5)
348 |     }
349 | }
350 | 
351 | // ------------------------------------------------------
352 | 
353 | // MARK: OpenGLImageView
354 | 
355 | class OpenGLImageView: GLKView
356 | {
357 |     let eaglContext = EAGLContext(API: .OpenGLES2)
358 |     
359 |     lazy var ciContext: CIContext =
360 |     {
361 |         [unowned self] in
362 |         
363 |         return CIContext(EAGLContext: self.eaglContext,
364 |             options: [kCIContextWorkingColorSpace: NSNull()])
365 |     }()
366 |     
367 |     override init(frame: CGRect)
368 |     {
369 |         super.init(frame: frame, context: eaglContext)
370 |     
371 |         context = self.eaglContext
372 |         delegate = self
373 |     }
374 | 
375 |     override init(frame: CGRect, context: EAGLContext)
376 |     {
377 |         fatalError("init(frame:, context:) has not been implemented")
378 |     }
379 |     
380 |     required init?(coder aDecoder: NSCoder)
381 |     {
382 |         fatalError("init(coder:) has not been implemented")
383 |     }
384 |     
385 |     /// The image to display
386 |     var image: CIImage?
387 |     {
388 |         didSet
389 |         {
390 |             setNeedsDisplay()
391 |         }
392 |     }
393 | }
394 | 
395 | extension OpenGLImageView: GLKViewDelegate
396 | {
397 |     func glkView(view: GLKView, drawInRect rect: CGRect)
398 |     {
399 |         guard let image = image else
400 |         {
401 |             return
402 |         }
403 |    
404 |         let targetRect = image.extent.aspectFitInRect(
405 |             target: CGRect(origin: CGPointZero,
406 |                 size: CGSize(width: drawableWidth,
407 |                     height: drawableHeight)))
408 |         
409 |         let ciBackgroundColor = CIColor(
410 |             color: backgroundColor ?? UIColor.whiteColor())
411 |         
412 |         ciContext.drawImage(CIImage(color: ciBackgroundColor),
413 |             inRect: CGRect(x: 0,
414 |                 y: 0,
415 |                 width: drawableWidth,
416 |                 height: drawableHeight),
417 |             fromRect: CGRect(x: 0,
418 |                 y: 0,
419 |                 width: drawableWidth,
420 |                 height: drawableHeight))
421 |         
422 |         ciContext.drawImage(image,
423 |             inRect: targetRect,
424 |             fromRect: image.extent)
425 |     }
426 | }
427 | 
428 | extension CGRect
429 | {
430 |     func aspectFitInRect(target target: CGRect) -> CGRect
431 |     {
432 |         let scale: CGFloat =
433 |         {
434 |             let scale = target.width / self.width
435 |             
436 |             return self.height * scale <= target.height ?
437 |                 scale :
438 |                 target.height / self.height
439 |         }()
440 |         
441 |         let width = self.width * scale
442 |         let height = self.height * scale
443 |         let x = target.midX - width / 2
444 |         let y = target.midY - height / 2
445 |         
446 |         return CGRect(x: x,
447 |             y: y,
448 |             width: width,
449 |             height: height)
450 |     }
451 | }


--------------------------------------------------------------------------------
/CoreImageConvolutionExplorer/components/KernelDetailView.swift:
--------------------------------------------------------------------------------
  1 | //
  2 | //  KernelDetailView.swift
  3 | //  CoreImageConvolutionExplorer
  4 | //
  5 | //  Created by Simon Gladman on 17/03/2016.
  6 | //  Copyright © 2016 Simon Gladman. All rights reserved.
  7 | //
  8 | 
  9 | import UIKit
 10 | 
 11 | class KernelDetailView: UIView
 12 | {
 13 |     let totalLabel: UILabel =
 14 |     {
 15 |         let label = UILabel()
 16 |         
 17 |         label.font = UIFont.boldSystemFontOfSize(20)
 18 |         label.textAlignment = .Center
 19 |         label.text = "Select Kernel";
 20 |         
 21 |         return label
 22 |     }()
 23 |     
 24 |     let labels: [UILabel] =
 25 |     {
 26 |         var array = [UILabel]()
 27 |         
 28 |         for _ in 0 ..< 49
 29 |         {
 30 |             let label = UILabel()
 31 |             
 32 |             label.backgroundColor = .darkGrayColor()
 33 |             label.textColor = .whiteColor()
 34 |             label.textAlignment = .Center
 35 |             label.adjustsFontSizeToFitWidth = true
 36 |             label.font = UIFont.boldSystemFontOfSize(20)
 37 |             
 38 |             array.append(label)
 39 |         }
 40 |         
 41 |         return array
 42 |     }()
 43 |     
 44 |     var weights: [CGFloat]?
 45 |     {
 46 |         didSet
 47 |         {
 48 |             if weights?.count != 9 && weights?.count != 25 && weights?.count != 49
 49 |             {
 50 |                 fatalError("Weights array is wrong length!")
 51 |             }
 52 |             
 53 |             if let weights = weights
 54 |             {
 55 |                 let total = weights.reduce(0, combine: +)
 56 | 
 57 |                 totalLabel.textColor = total == 0 ? UIColor.yellowColor() : total < 0 ? UIColor.redColor() : UIColor.blackColor()
 58 |                 totalLabel.backgroundColor = total == 0 ? UIColor.darkGrayColor() : UIColor.whiteColor()
 59 |                 totalLabel.text = "Σ \(total)"
 60 |             }
 61 |             else
 62 |             {
 63 |                 totalLabel.text = ""
 64 |             }
 65 |             
 66 |             updateWeightsGrid()
 67 |         }
 68 |     }
 69 |     
 70 |     override init(frame: CGRect)
 71 |     {
 72 |         super.init(frame: frame)
 73 |         
 74 |         labels.forEach
 75 |         {
 76 |             addSubview($0)
 77 |         }
 78 |         
 79 |         addSubview(totalLabel)
 80 |     }
 81 | 
 82 |     required init?(coder aDecoder: NSCoder)
 83 |     {
 84 |         fatalError("init(coder:) has not been implemented")
 85 |     }
 86 |     
 87 |     func updateWeightsGrid()
 88 |     {
 89 |         guard let weights = weights else
 90 |         {
 91 |             return
 92 |         }
 93 |         
 94 |         var sourceIndex = 0
 95 |         
 96 |         labels.enumerate().forEach
 97 |         {
 98 |             let x = $0 % 7
 99 |             let y = $0 / 7
100 |             
101 |             switch weights.count
102 |             {
103 |             case 9:
104 |                 if x > 1 && x < 5 && y > 1 && y < 5
105 |                 {
106 |                     $1.text = "\(weights[sourceIndex])"
107 |                     sourceIndex += 1
108 |                 }
109 |                 else
110 |                 {
111 |                     $1.text = ""
112 |                 }
113 |             case 25:
114 |                 if x > 0 && x < 6 && y > 0 && y < 6
115 |                 {
116 |                     $1.text = "\(weights[sourceIndex])"
117 |                     sourceIndex += 1
118 |                 }
119 |                 else
120 |                 {
121 |                     $1.text = ""
122 |                 }
123 |             default:
124 |                 $1.text = "\(weights[$0])"
125 |             }
126 |         }
127 |     }
128 |     
129 |     override func layoutSubviews()
130 |     {
131 |         let boxSide = Int(min(frame.width, frame.height) / 7)
132 |         let boxesTop = (Int(max(frame.width, frame.height)) - (boxSide * 7)) / 2
133 | 
134 |         labels.enumerate().forEach
135 |         {
136 |             let x = $0 % 7
137 |             let y = $0 / 7
138 |             
139 |             $1.frame = CGRect(x: x * boxSide,
140 |                 y: boxesTop + y * boxSide,
141 |                 width: boxSide,
142 |                 height: boxSide).insetBy(dx: 0.5, dy: 0.5)
143 |         }
144 |         
145 |         totalLabel.frame = CGRect(x: 0, y:
146 |             frame.height - 10 - totalLabel.intrinsicContentSize().height,
147 |             width: frame.width,
148 |             height: totalLabel.intrinsicContentSize().height)
149 |     }
150 | }
151 | 


--------------------------------------------------------------------------------
/CoreImageConvolutionExplorer/components/KernelsTableView.swift:
--------------------------------------------------------------------------------
 1 | //
 2 | //  KernelsTableView.swift
 3 | //  CoreImageConvolutionExplorer
 4 | //
 5 | //  Created by Simon Gladman on 17/03/2016.
 6 | //  Copyright © 2016 Simon Gladman. All rights reserved.
 7 | //
 8 | 
 9 | import UIKit
10 | 
11 | class KernelsTableView: UIControl
12 | {
13 |     let model = CoreImageConvolutionExplorerModel()
14 |     
15 |     let tableView: UITableView =
16 |     {
17 |         let tableView = UITableView(frame: CGRectZero,
18 |             style: UITableViewStyle.Plain)
19 | 
20 |         tableView.registerClass(UITableViewCell.self,
21 |             forCellReuseIdentifier: "ItemRenderer")
22 |         
23 |         return tableView
24 |     }()
25 |     
26 |     private (set) var weights: [CGFloat]?
27 |     
28 |     override init(frame: CGRect)
29 |     {
30 |         super.init(frame: frame)
31 | 
32 |         addSubview(tableView)
33 |         tableView.dataSource = self
34 |         tableView.delegate = self
35 |         
36 |         tableView.reloadData()
37 |     }
38 | 
39 |     required init?(coder aDecoder: NSCoder)
40 |     {
41 |         fatalError("init(coder:) has not been implemented")
42 |     }
43 |     
44 |     override func layoutSubviews()
45 |     {
46 |         tableView.frame = bounds
47 |     }
48 | }
49 | 
50 | extension KernelsTableView: UITableViewDataSource
51 | {
52 |     func numberOfSectionsInTableView(tableView: UITableView) -> Int
53 |     {
54 |         return 1
55 |     }
56 |     
57 |     func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int
58 |     {
59 |         return model.kernels.count
60 |     }
61 |     
62 |     func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
63 |     {
64 |         let cell = tableView.dequeueReusableCellWithIdentifier("ItemRenderer",
65 |             forIndexPath: indexPath)
66 |      
67 |         cell.textLabel?.text = model.kernels[indexPath.row].name
68 |         cell.textLabel?.numberOfLines = 2
69 |         cell.textLabel?.textAlignment = .Center
70 |         
71 |         return cell
72 |     }
73 | }
74 | 
75 | extension KernelsTableView: UITableViewDelegate
76 | {
77 |     func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath)
78 |     {
79 |         weights = model.kernels[indexPath.row].weights
80 | 
81 |         sendActionsForControlEvents(.ValueChanged)
82 |     }
83 | }


--------------------------------------------------------------------------------
/CoreImageConvolutionExplorer/model/CoreImageConvolutionExplorerModel.swift:
--------------------------------------------------------------------------------
  1 | //
  2 | //  CoreImageConvolutionExplorerModel.swift
  3 | //  CoreImageConvolutionExplorer
  4 | //
  5 | //  Created by Simon Gladman on 17/03/2016.
  6 | //  Copyright © 2016 Simon Gladman. All rights reserved.
  7 | //
  8 | 
  9 | import CoreGraphics
 10 | 
 11 | struct Kernel
 12 | {
 13 |     let name: String
 14 |     let weights: [CGFloat]
 15 | }
 16 | 
 17 | struct CoreImageConvolutionExplorerModel
 18 | {
 19 |     let kernels = [
 20 |         
 21 |         Kernel(name: "3 x 3 Identity", weights: [
 22 |             0,0,0,
 23 |             0,1,0,
 24 |             0,0,0]),
 25 |         
 26 |         Kernel(name: "3 x 3 Box Blur", weights: [
 27 |             1,1,1,
 28 |             1,1,1,
 29 |             1,1,1]),
 30 |         
 31 |         Kernel(name: "3 x 3 Sharpen", weights: [
 32 |              0, -1,  0,
 33 |             -1,  5, -1,
 34 |              0, -1,  0
 35 |             ]),
 36 |         
 37 |         Kernel(name: "3 x 3 Sharper", weights: [
 38 |             -1,-1,-1,
 39 |             -1, 9,-1,
 40 |             -1,-1,-1
 41 |             ]),
 42 |         
 43 |         Kernel(name: "3 x 3 Sharpest", weights: [
 44 |             1,  1, 1,
 45 |             1, -7, 1,
 46 |             1,  1, 1
 47 |             ]),
 48 |         
 49 |         Kernel(name: "3 x 3 Edge Detect", weights: [
 50 |             -1,-1,-1,
 51 |             -1, 8,-1,
 52 |             -1,-1,-1
 53 |             ]),
 54 |         
 55 |         Kernel(name: "3 x 3 Laplacian", weights: [
 56 |             0, 1, 0,
 57 |             1, -4,1,
 58 |             0, 1, 0
 59 |             ]),
 60 |         
 61 |         Kernel(name: "3 x 3 Emboss", weights: [
 62 |             -2, -1, 0,
 63 |             -1,  1, 1,
 64 |              0,  1, 2]),
 65 |         
 66 |         Kernel(name: "3 x 3 Emboss (2)", weights: [
 67 |             2,  0, 0,
 68 |             0, -1, 0,
 69 |             0, 0, -1]),
 70 |         
 71 |         Kernel(name: "3 x 3 Sobel x", weights: [
 72 |             -1, 0, 1,
 73 |             -2, 0, 2,
 74 |             -1, 0, 1]),
 75 |         
 76 |         Kernel(name: "3 x 3 Sobel y", weights: [
 77 |             -1, -2, -1,
 78 |              0,  0,  0,
 79 |              1,  2,  1]),
 80 | 
 81 |         Kernel(name: "5 x 5 Box Blur", weights: [
 82 |             1,1,1,1,1,
 83 |             1,1,1,1,1,
 84 |             1,1,1,1,1,
 85 |             1,1,1,1,1,
 86 |             1,1,1,1,1]),
 87 |         
 88 |         Kernel(name: "5 x 5 Bias Demo Emboss (zero)", weights: [
 89 |             5,5,5,5,5,
 90 |             5,0,0,0,-5,
 91 |             5,0,0,0,-5,
 92 |             5,0,0,0,-5,
 93 |             -5,-5,-5,-5,-5
 94 |             ]),
 95 |         
 96 |         Kernel(name: "5 x 5 Bias Demo Emboss (+ve)", weights: [
 97 |             5,5,5,5,5,
 98 |             5,0,0,0,-5,
 99 |             5,0,0,0,-5,
100 |             5,0,0,0,-5,
101 |             5,-5,-5,-5,-5
102 |             ]),
103 | 
104 |         Kernel(name: "5 x 5 Laplacian", weights: [
105 |             -4, -1, 0, -1, -4,
106 |             -1,  2, 3,  2, -1,
107 |              0,  3, 4,  3,  0,
108 |             -1,  2, 3,  2, -1,
109 |             -4, -1, 0, -1, -4
110 |             ]),
111 |         
112 |         Kernel(name: "5 x 5 Gaussian Blur", weights: [
113 |              1,  4,  7,  4, 1,
114 |              4, 16, 26, 16, 4,
115 |              7, 26, 41, 26, 7,
116 |              4, 16, 26, 16, 4,
117 |              1,  4,  7,  4, 1
118 |             ]),
119 |         
120 |         Kernel(name: "5 x 5 Laplacian of Gaussian", weights: [
121 |              0,  0, -1,  0,  0,
122 |              0, -1, -2, -1,  0,
123 |             -1, -2, 16, -2, -1,
124 |              0, -1, -2, -1,  0,
125 |              0,  0, -1,  0,  0
126 |             ]), 
127 | 
128 |         Kernel(name: "5 x 5 Emboss", weights: [
129 |             -1, -1, -1, -1, 0,
130 |             -1, -1, -1,  0, 1,
131 |             -1, -1,  0,  1, 1,
132 |             -1,  0,  1,  1, 0,
133 |              0,  1,  1,  1, 1
134 |             ]),
135 |         
136 |         Kernel(name: "5 x 5 Unsharp", weights: [
137 |             1, 4, 6, 4, 1,
138 |             4, 16, 24, 16, 4,
139 |             6, 24, -476, 24, 6,
140 |             4, 16, 24, 16, 4,
141 |             1, 4, 6, 4, 1,
142 |             ]),
143 |         
144 |         Kernel(name: "5 x 5 Sharpen", weights: [
145 |             -1, -1, -1, -1, -1,
146 |             -1,  2,  2,  2, -1,
147 |             -1,  2,  8,  2, -1,
148 |             -1,  2,  2,  2, -1,
149 |             -1, -1, -1, -1, -1
150 |             ]),
151 |         
152 |         Kernel(name: "5 x 5 Sobel x", weights: [
153 |             -1, -2, 0, 2, 1,
154 |             -4, -8, 0, 8, 4,
155 |             -6, -12, 0, 12, 6,
156 |             -4, -8, 0, 8, 4,
157 |             -1, -2, 0, 2, 1,
158 |             ]),
159 |         
160 |         Kernel(name: "5 x 5 Sobel y", weights: [
161 |             -1, -4, -6, -4, -1,
162 |             -2, -8, -12, -8, -2,
163 |             0, 0, 0, 0, 0,
164 |             2, 8, 12, 8, 2,
165 |             1, 4, 6, 4, 1
166 |             ]),
167 |         
168 |         Kernel(name: "7 x 7 Box Blur", weights: [
169 |             1,1,1,1,1,1,1,
170 |             1,1,1,1,1,1,1,
171 |             1,1,1,1,1,1,1,
172 |             1,1,1,1,1,1,1,
173 |             1,1,1,1,1,1,1,
174 |             1,1,1,1,1,1,1,
175 |             1,1,1,1,1,1,1]),
176 |         
177 |         Kernel(name: "7 x 7 Sobel y", weights: [
178 |             -1, -3,  -6,  -8,  -6, -3, -1,
179 |             -2, -6, -14, -18, -14, -6, -2,
180 |             -3, -7, -15, -20, -15, -7, -3,
181 |              0,  0,   0,   0,   0,  0,  0,
182 |              3,  7,  15,  20,  15,  7,  3,
183 |              2,  6,  14,  18,  14,  6,  2,
184 |              1,  3,   6,   8,   6,  3,  1
185 |             ]),
186 |         
187 |         Kernel(name: "7 x 7 Sobel x", weights: [
188 |             -1,  -2,  -3, 0,  3,  2, 1,
189 |             -3,  -6,  -7, 0,  7,  6, 3,
190 |             -6, -14, -15, 0, 15, 14, 6,
191 |             -8, -18, -20, 0, 20, 18, 8,
192 |             -6, -14, -15, 0, 15, 14, 6,
193 |             -3,  -6,  -7, 0,  7,  6, 3,
194 |             -1,  -2,  -3, 0,  3,  2, 1,
195 |             ]),
196 |         
197 |         Kernel(name: "7 x 7 Edge Detect", weights: [
198 |              0,  0, -1, -1, -1,  0,  0,
199 |              0, -1, -3, -3, -3, -1,  0,
200 |             -1, -3,  0,  7,  0, -3, -1,
201 |             -1, -3,  7, 25,  7, -3, -1,
202 |             -1, -3,  0,  7,  0, -3, -1,
203 |              0, -1, -3, -3, -3, -1,  0,
204 |              0,  0, -1, -1, -1,  0,  0
205 |             ]),
206 |         
207 |         Kernel(name: "7 x 7 Gaussian Blur", weights: [
208 |             0,  0,   0,   5,   0,  0, 0,
209 |             0,  5,  18,  32,  18,  5, 0,
210 |             0, 18,  64, 100,  64, 18, 0,
211 |             5, 32, 100, 100, 100, 32, 5,
212 |             0, 18,  64, 100,  64, 18, 0,
213 |             0,  5,  18,  32,  18,  5, 0,
214 |             0,  0,   0,  5,    0,  0, 0
215 |             ]),
216 |  
217 |         Kernel(name: "7 x 7 Laplacian", weights: [
218 |             -10, -5, -2, -1, -2, -5, -10,
219 |              -5,  0,  3,  4,  3,  0,  -5,
220 |              -2,  3,  6,  7,  6,  3,  -2,
221 |              -1,  4,  7,  8,  7,  4,  -1,
222 |              -2,  3,  6,  7,  6,  3,  -2,
223 |              -5,  0,  3,  4,  3,  0,  -5,
224 |             -10, -5, -2, -1, -2, -5, -10
225 |             ])
226 |         
227 |         ].sort({$0.name < $1.name})
228 | }
229 | 


--------------------------------------------------------------------------------
/CoreImageConvolutionExplorer/railroad.jpg:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/FlexMonkey/CoreImageConvolutionExplorer/5dc35a3e269fa3953db49ed4cca95e2e9e238efe/CoreImageConvolutionExplorer/railroad.jpg


--------------------------------------------------------------------------------
/CoreImageConvolutionExplorer/screenshot.PNG:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/FlexMonkey/CoreImageConvolutionExplorer/5dc35a3e269fa3953db49ed4cca95e2e9e238efe/CoreImageConvolutionExplorer/screenshot.PNG


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
 1 | # CoreImageConvolutionExplorer
 2 | Core Image Convolution Explorer
 3 | 
 4 | ![CoreImageConvolutionExplorer/screenshot.PNG](CoreImageConvolutionExplorer/screenshot.PNG)
 5 | 
 6 | An iPad app to explore 28 different convolution kernels including blurs, edege detections and embosses. The app includes controls for normalizing the weight values and setting bias. It also includes a toggle to either premultiply or unpremultiply colors when making opaque.
 7 | 
 8 | This project is a companion to the convolution chapter of my book, *Core Image For Swift*. The book is available from:
 9 | 
10 | * [*Core Image for Swift* from iBooks Store](https://itunes.apple.com/us/book/core-image-for-swift/id1073029980?mt=13)
11 | * [*Core Image For Swift* from Gumroad](https://gumroad.com/l/CoreImageForSwift)
12 | 


--------------------------------------------------------------------------------