├── README.md
├── Text Detection Starter Project.xcodeproj
    ├── project.pbxproj
    ├── project.xcworkspace
    │   ├── contents.xcworkspacedata
    │   └── xcuserdata
    │   │   ├── SaiKambampati.xcuserdatad
    │   │       └── UserInterfaceState.xcuserstate
    │   │   ├── idscomercial.xcuserdatad
    │   │       └── UserInterfaceState.xcuserstate
    │   │   └── simon.xcuserdatad
    │   │       └── UserInterfaceState.xcuserstate
    └── xcuserdata
    │   ├── SaiKambampati.xcuserdatad
    │       └── xcschemes
    │       │   └── xcschememanagement.plist
    │   ├── idscomercial.xcuserdatad
    │       └── xcschemes
    │       │   └── xcschememanagement.plist
    │   └── simon.xcuserdatad
    │       └── xcschemes
    │           └── xcschememanagement.plist
├── Text Detection Starter Project
    ├── AppDelegate.swift
    ├── Assets.xcassets
    │   └── AppIcon.appiconset
    │   │   └── Contents.json
    ├── Base.lproj
    │   ├── LaunchScreen.storyboard
    │   └── Main.storyboard
    ├── Info.plist
    └── ViewController.swift
└── TextDetectionStarter.zip


/README.md:
--------------------------------------------------------------------------------
1 | # Vision Framework Demo on Text Detection
2 | 
3 | Among many of the powerful frameworks Apple released at this year’s WWDC, the Vision framework was one of them. With the Vision framework, you can easily implement computer vision techniques into your apps with no higher knowledge at all! With Vision, you can have your app perform a number of powerful tasks such as identifying faces and faical features (ex: smile, frown, left eyebrow, etc.), barcode detection, classifying scenes in images, object detection and tracking, and horizon detection.
4 | 
5 | In this demo app, we show you how to work the Vision framework in Swift. For the full tutorial, please refer to the link below:
6 | 
7 | http://www.appcoda.com/vision-framework-introduction
8 | 
9 | 


--------------------------------------------------------------------------------
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/Text Detection Starter Project/AppDelegate.swift:
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 1 | //
 2 | //  AppDelegate.swift
 3 | //  Text Detection Starter Project
 4 | //
 5 | //  Created by Sai Kambampati on 6/21/17.
 6 | //  Copyright © 2017 AppCoda. 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: [UIApplication.LaunchOptionsKey: Any]?) -> 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 invalidate graphics rendering callbacks. 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 active 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 | 


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/Text Detection Starter Project/Assets.xcassets/AppIcon.appiconset/Contents.json:
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 1 | {
 2 |   "images" : [
 3 |     {
 4 |       "idiom" : "iphone",
 5 |       "size" : "20x20",
 6 |       "scale" : "2x"
 7 |     },
 8 |     {
 9 |       "idiom" : "iphone",
10 |       "size" : "20x20",
11 |       "scale" : "3x"
12 |     },
13 |     {
14 |       "idiom" : "iphone",
15 |       "size" : "29x29",
16 |       "scale" : "2x"
17 |     },
18 |     {
19 |       "idiom" : "iphone",
20 |       "size" : "29x29",
21 |       "scale" : "3x"
22 |     },
23 |     {
24 |       "idiom" : "iphone",
25 |       "size" : "40x40",
26 |       "scale" : "2x"
27 |     },
28 |     {
29 |       "idiom" : "iphone",
30 |       "size" : "40x40",
31 |       "scale" : "3x"
32 |     },
33 |     {
34 |       "idiom" : "iphone",
35 |       "size" : "60x60",
36 |       "scale" : "2x"
37 |     },
38 |     {
39 |       "idiom" : "iphone",
40 |       "size" : "60x60",
41 |       "scale" : "3x"
42 |     },
43 |     {
44 |       "idiom" : "ipad",
45 |       "size" : "20x20",
46 |       "scale" : "1x"
47 |     },
48 |     {
49 |       "idiom" : "ipad",
50 |       "size" : "20x20",
51 |       "scale" : "2x"
52 |     },
53 |     {
54 |       "idiom" : "ipad",
55 |       "size" : "29x29",
56 |       "scale" : "1x"
57 |     },
58 |     {
59 |       "idiom" : "ipad",
60 |       "size" : "29x29",
61 |       "scale" : "2x"
62 |     },
63 |     {
64 |       "idiom" : "ipad",
65 |       "size" : "40x40",
66 |       "scale" : "1x"
67 |     },
68 |     {
69 |       "idiom" : "ipad",
70 |       "size" : "40x40",
71 |       "scale" : "2x"
72 |     },
73 |     {
74 |       "idiom" : "ipad",
75 |       "size" : "76x76",
76 |       "scale" : "1x"
77 |     },
78 |     {
79 |       "idiom" : "ipad",
80 |       "size" : "76x76",
81 |       "scale" : "2x"
82 |     },
83 |     {
84 |       "idiom" : "ipad",
85 |       "size" : "83.5x83.5",
86 |       "scale" : "2x"
87 |     }
88 |   ],
89 |   "info" : {
90 |     "version" : 1,
91 |     "author" : "xcode"
92 |   }
93 | }


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/Text Detection Starter Project/Base.lproj/LaunchScreen.storyboard:
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 1 | <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 2 | <document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="11134" systemVersion="15F34" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
 3 |     <dependencies>
 4 |         <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="11106"/>
 5 |         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
 6 |     </dependencies>
 7 |     <scenes>
 8 |         <!--View Controller-->
 9 |         <scene sceneID="EHf-IW-A2E">
10 |             <objects>
11 |                 <viewController id="01J-lp-oVM" sceneMemberID="viewController">
12 |                     <layoutGuides>
13 |                         <viewControllerLayoutGuide type="top" id="Llm-lL-Icb"/>
14 |                         <viewControllerLayoutGuide type="bottom" id="xb3-aO-Qok"/>
15 |                     </layoutGuides>
16 |                     <view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
17 |                         <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
18 |                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
19 |                         <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
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 | 


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/Text Detection Starter Project/Base.lproj/Main.storyboard:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="13122.17" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="9jC-VC-uBH">
 3 |     <device id="retina4_7" orientation="portrait">
 4 |         <adaptation id="fullscreen"/>
 5 |     </device>
 6 |     <dependencies>
 7 |         <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="13104.14"/>
 8 |         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
 9 |     </dependencies>
10 |     <scenes>
11 |         <!--Text Detection-->
12 |         <scene sceneID="xZ7-1P-gne">
13 |             <objects>
14 |                 <viewController id="sUm-rZ-Uzf" customClass="ViewController" customModule="Text_Detection_Starter_Project" customModuleProvider="target" sceneMemberID="viewController">
15 |                     <layoutGuides>
16 |                         <viewControllerLayoutGuide type="top" id="g5A-07-oaV"/>
17 |                         <viewControllerLayoutGuide type="bottom" id="hkc-3r-lWU"/>
18 |                     </layoutGuides>
19 |                     <view key="view" contentMode="scaleToFill" id="uNu-gH-O9F">
20 |                         <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
21 |                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
22 |                         <subviews>
23 |                             <imageView userInteractionEnabled="NO" contentMode="scaleToFill" horizontalHuggingPriority="251" verticalHuggingPriority="251" translatesAutoresizingMaskIntoConstraints="NO" id="G3u-JN-vRh">
24 |                                 <rect key="frame" x="0.0" y="64" width="375" height="527"/>
25 |                             </imageView>
26 |                             <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" usesAttributedText="YES" lineBreakMode="tailTruncation" numberOfLines="0" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="ji5-LB-R3A">
27 |                                 <rect key="frame" x="0.0" y="599" width="375" height="68"/>
28 |                                 <attributedString key="attributedText">
29 |                                     <fragment content="Words
">
30 |                                         <attributes>
31 |                                             <color key="NSColor" red="0.91805601120000002" green="0.29896932840000001" blue="0.2010047734" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
32 |                                             <font key="NSFont" size="29" name="SFMono-Bold"/>
33 |                                             <paragraphStyle key="NSParagraphStyle" alignment="center" lineBreakMode="wordWrapping" baseWritingDirection="natural" tighteningFactorForTruncation="0.0"/>
34 |                                         </attributes>
35 |                                     </fragment>
36 |                                     <fragment content="Letters">
37 |                                         <attributes>
38 |                                             <color key="NSColor" red="0.033137437729999997" green="0.34795832570000002" blue="0.85755076139999997" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
39 |                                             <font key="NSFont" size="29" name="SFMono-Bold"/>
40 |                                             <paragraphStyle key="NSParagraphStyle" alignment="center" lineBreakMode="wordWrapping" baseWritingDirection="natural" tighteningFactorForTruncation="0.0"/>
41 |                                         </attributes>
42 |                                     </fragment>
43 |                                 </attributedString>
44 |                                 <nil key="highlightedColor"/>
45 |                             </label>
46 |                         </subviews>
47 |                         <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
48 |                         <constraints>
49 |                             <constraint firstItem="ji5-LB-R3A" firstAttribute="top" secondItem="G3u-JN-vRh" secondAttribute="bottom" constant="8" id="2EO-hQ-dtT"/>
50 |                             <constraint firstAttribute="trailing" secondItem="ji5-LB-R3A" secondAttribute="trailing" id="5la-gB-xZh"/>
51 |                             <constraint firstItem="hkc-3r-lWU" firstAttribute="top" secondItem="ji5-LB-R3A" secondAttribute="bottom" id="Bww-5b-4f7"/>
52 |                             <constraint firstAttribute="trailing" secondItem="G3u-JN-vRh" secondAttribute="trailing" id="Ima-3x-F3l"/>
53 |                             <constraint firstItem="ji5-LB-R3A" firstAttribute="top" secondItem="G3u-JN-vRh" secondAttribute="bottom" constant="8" id="NgV-Mx-4I7"/>
54 |                             <constraint firstItem="ji5-LB-R3A" firstAttribute="leading" secondItem="uNu-gH-O9F" secondAttribute="leading" id="Y1v-rY-xjt"/>
55 |                             <constraint firstItem="G3u-JN-vRh" firstAttribute="leading" secondItem="uNu-gH-O9F" secondAttribute="leading" id="aKe-sc-ngT"/>
56 |                             <constraint firstItem="G3u-JN-vRh" firstAttribute="top" secondItem="g5A-07-oaV" secondAttribute="bottom" id="mSb-Cd-GqK"/>
57 |                         </constraints>
58 |                     </view>
59 |                     <navigationItem key="navigationItem" title="Text Detection" largeTitleDisplayMode="always" id="PXc-39-tmk"/>
60 |                     <connections>
61 |                         <outlet property="imageView" destination="G3u-JN-vRh" id="2LP-bR-Uht"/>
62 |                     </connections>
63 |                 </viewController>
64 |                 <placeholder placeholderIdentifier="IBFirstResponder" id="KwP-w7-o8p" sceneMemberID="firstResponder"/>
65 |             </objects>
66 |             <point key="canvasLocation" x="1255" y="139"/>
67 |         </scene>
68 |         <!--Navigation Controller-->
69 |         <scene sceneID="yJb-ga-FWE">
70 |             <objects>
71 |                 <navigationController automaticallyAdjustsScrollViewInsets="NO" id="9jC-VC-uBH" sceneMemberID="viewController">
72 |                     <toolbarItems/>
73 |                     <navigationBar key="navigationBar" contentMode="scaleToFill" id="v09-hc-Jv2">
74 |                         <rect key="frame" x="0.0" y="0.0" width="375" height="44"/>
75 |                         <autoresizingMask key="autoresizingMask"/>
76 |                     </navigationBar>
77 |                     <nil name="viewControllers"/>
78 |                     <connections>
79 |                         <segue destination="sUm-rZ-Uzf" kind="relationship" relationship="rootViewController" id="ABM-gF-EVw"/>
80 |                     </connections>
81 |                 </navigationController>
82 |                 <placeholder placeholderIdentifier="IBFirstResponder" id="9T9-MV-oUX" userLabel="First Responder" sceneMemberID="firstResponder"/>
83 |             </objects>
84 |             <point key="canvasLocation" x="475.19999999999999" y="138.53073463268368"/>
85 |         </scene>
86 |     </scenes>
87 | </document>
88 | 


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/Text Detection Starter Project/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>$(DEVELOPMENT_LANGUAGE)</string>
 7 | 	<key>CFBundleExecutable</key>
 8 | 	<string>$(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>CFBundleVersion</key>
20 | 	<string>1</string>
21 | 	<key>LSRequiresIPhoneOS</key>
22 | 	<true/>
23 | 	<key>NSCameraUsageDescription</key>
24 | 	<string>for text detection</string>
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>UISupportedInterfaceOrientations</key>
34 | 	<array>
35 | 		<string>UIInterfaceOrientationPortrait</string>
36 | 		<string>UIInterfaceOrientationLandscapeLeft</string>
37 | 		<string>UIInterfaceOrientationLandscapeRight</string>
38 | 	</array>
39 | 	<key>UISupportedInterfaceOrientations~ipad</key>
40 | 	<array>
41 | 		<string>UIInterfaceOrientationPortrait</string>
42 | 		<string>UIInterfaceOrientationPortraitUpsideDown</string>
43 | 		<string>UIInterfaceOrientationLandscapeLeft</string>
44 | 		<string>UIInterfaceOrientationLandscapeRight</string>
45 | 	</array>
46 | </dict>
47 | </plist>
48 | 


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/Text Detection Starter Project/ViewController.swift:
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  1 | //
  2 | //  ViewController.swift
  3 | //  Text Detection Starter Project
  4 | //
  5 | //  Created by Sai Kambampati on 6/21/17.
  6 | //  Copyright © 2017 AppCoda. All rights reserved.
  7 | //
  8 | 
  9 | import UIKit
 10 | import AVFoundation
 11 | import Vision
 12 | 
 13 | class ViewController: UIViewController {
 14 |     
 15 |     @IBOutlet weak var imageView: UIImageView!
 16 |     var session = AVCaptureSession()
 17 |     var requests = [VNRequest]()
 18 |     
 19 |     override func viewDidLoad() {
 20 |         super.viewDidLoad()
 21 |         
 22 |         startLiveVideo()
 23 |         startTextDetection()
 24 |     }
 25 |     
 26 |     override func viewWillAppear(_ animated: Bool) {
 27 |         
 28 |     }
 29 |     
 30 |     override func didReceiveMemoryWarning() {
 31 |         super.didReceiveMemoryWarning()
 32 |         // Dispose of any resources that can be recreated.
 33 |     }
 34 |     
 35 |     func startLiveVideo() {
 36 |         //1
 37 |         session.sessionPreset = AVCaptureSession.Preset.photo
 38 |         let captureDevice = AVCaptureDevice.default(for: AVMediaType.video)
 39 |         
 40 |         //2
 41 |         let deviceInput = try! AVCaptureDeviceInput(device: captureDevice!)
 42 |         let deviceOutput = AVCaptureVideoDataOutput()
 43 |         deviceOutput.videoSettings = [kCVPixelBufferPixelFormatTypeKey as String: Int(kCVPixelFormatType_32BGRA)]
 44 |         deviceOutput.setSampleBufferDelegate(self, queue: DispatchQueue.global(qos: DispatchQoS.QoSClass.default))
 45 |         session.addInput(deviceInput)
 46 |         session.addOutput(deviceOutput)
 47 |         
 48 |         //3
 49 |         let imageLayer = AVCaptureVideoPreviewLayer(session: session)
 50 |         imageLayer.frame = imageView.bounds
 51 |         imageView.layer.addSublayer(imageLayer)
 52 |         
 53 |         session.startRunning()
 54 |     }
 55 |     
 56 |     override func viewDidLayoutSubviews() {
 57 |         imageView.layer.sublayers?[0].frame = imageView.bounds
 58 |     }
 59 |     
 60 |     func startTextDetection() {
 61 |         let textRequest = VNDetectTextRectanglesRequest(completionHandler: self.detectTextHandler)
 62 |         textRequest.reportCharacterBoxes = true
 63 |         self.requests = [textRequest]
 64 |     }
 65 |     
 66 |     func detectTextHandler(request: VNRequest, error: Error?) {
 67 |         guard let observations = request.results else {
 68 |             print("no result")
 69 |             return
 70 |         }
 71 |         
 72 |         let result = observations.map({$0 as? VNTextObservation})
 73 |         
 74 |         DispatchQueue.main.async() {
 75 |             self.imageView.layer.sublayers?.removeSubrange(1...)
 76 |             for region in result {
 77 |                 guard let rg = region else {
 78 |                     continue
 79 |                 }
 80 |                 
 81 |                 self.highlightWord(box: rg)
 82 |                 
 83 |                 if let boxes = region?.characterBoxes {
 84 |                     for characterBox in boxes {
 85 |                         self.highlightLetters(box: characterBox)
 86 |                     }
 87 |                 }
 88 |             }
 89 |         }
 90 |     }
 91 |     
 92 |     func highlightWord(box: VNTextObservation) {
 93 |         guard let boxes = box.characterBoxes else {
 94 |             return
 95 |         }
 96 |         
 97 |         var maxX: CGFloat = 9999.0
 98 |         var minX: CGFloat = 0.0
 99 |         var maxY: CGFloat = 9999.0
100 |         var minY: CGFloat = 0.0
101 |         
102 |         for char in boxes {
103 |             if char.bottomLeft.x < maxX {
104 |                 maxX = char.bottomLeft.x
105 |             }
106 |             if char.bottomRight.x > minX {
107 |                 minX = char.bottomRight.x
108 |             }
109 |             if char.bottomRight.y < maxY {
110 |                 maxY = char.bottomRight.y
111 |             }
112 |             if char.topRight.y > minY {
113 |                 minY = char.topRight.y
114 |             }
115 |         }
116 |         
117 |         let xCord = maxX * imageView.frame.size.width
118 |         let yCord = (1 - minY) * imageView.frame.size.height
119 |         let width = (minX - maxX) * imageView.frame.size.width
120 |         let height = (minY - maxY) * imageView.frame.size.height
121 |         
122 |         let outline = CALayer()
123 |         outline.frame = CGRect(x: xCord, y: yCord, width: width, height: height)
124 |         outline.borderWidth = 2.0
125 |         outline.borderColor = UIColor.red.cgColor
126 |         
127 |         imageView.layer.addSublayer(outline)
128 |     }
129 |     
130 |     func highlightLetters(box: VNRectangleObservation) {
131 |         let xCord = box.topLeft.x * imageView.frame.size.width
132 |         let yCord = (1 - box.topLeft.y) * imageView.frame.size.height
133 |         let width = (box.topRight.x - box.bottomLeft.x) * imageView.frame.size.width
134 |         let height = (box.topLeft.y - box.bottomLeft.y) * imageView.frame.size.height
135 |         
136 |         let outline = CALayer()
137 |         outline.frame = CGRect(x: xCord, y: yCord, width: width, height: height)
138 |         outline.borderWidth = 1.0
139 |         outline.borderColor = UIColor.blue.cgColor
140 |         
141 |         imageView.layer.addSublayer(outline)
142 |     }
143 | }
144 | 
145 | extension ViewController: AVCaptureVideoDataOutputSampleBufferDelegate {
146 |     func captureOutput(_ output: AVCaptureOutput, didOutput sampleBuffer: CMSampleBuffer, from connection: AVCaptureConnection) {
147 |         guard let pixelBuffer = CMSampleBufferGetImageBuffer(sampleBuffer) else {
148 |             return
149 |         }
150 |         
151 |         var requestOptions:[VNImageOption : Any] = [:]
152 |         
153 |         if let camData = CMGetAttachment(sampleBuffer, key: kCMSampleBufferAttachmentKey_CameraIntrinsicMatrix, attachmentModeOut: nil) {
154 |             requestOptions = [.cameraIntrinsics:camData]
155 |         }
156 |         
157 |         let imageRequestHandler = VNImageRequestHandler(cvPixelBuffer: pixelBuffer, orientation: CGImagePropertyOrientation(rawValue: 6)!, options: requestOptions)
158 |         
159 |         do {
160 |             try imageRequestHandler.perform(self.requests)
161 |         } catch {
162 |             print(error)
163 |         }
164 |     }
165 | }
166 | 


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/TextDetectionStarter.zip:
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https://raw.githubusercontent.com/appcoda/TextDetection/3bfac0600d91d5db91436f528c6bebc1c6cd7770/TextDetectionStarter.zip


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