├── .gitignore ├── LICENSE ├── README.md ├── bin └── kivyopencvdemo-0.1-arm64-v8a-debug.apk ├── buildozer.spec ├── cam.kv ├── main.py ├── myapplayout.kv ├── pics └── Screenshot_20211125-180744.jpg └── video └── VID_20211031_162912.mp4-inference-short.mp4 /.gitignore: -------------------------------------------------------------------------------- 1 | # Byte-compiled / optimized / DLL files 2 | __pycache__/ 3 | *.py[cod] 4 | *$py.class 5 | 6 | # C extensions 7 | *.so 8 | 9 | # Distribution / packaging 10 | .Python 11 | build/ 12 | develop-eggs/ 13 | dist/ 14 | downloads/ 15 | eggs/ 16 | .eggs/ 17 | lib/ 18 | lib64/ 19 | parts/ 20 | sdist/ 21 | var/ 22 | wheels/ 23 | pip-wheel-metadata/ 24 | share/python-wheels/ 25 | *.egg-info/ 26 | .installed.cfg 27 | *.egg 28 | MANIFEST 29 | 30 | # PyInstaller 31 | # Usually these files are written by a python script from a template 32 | # before PyInstaller builds the exe, so as to inject date/other infos into it. 33 | *.manifest 34 | *.spec 35 | 36 | # Installer logs 37 | pip-log.txt 38 | pip-delete-this-directory.txt 39 | 40 | # Unit test / coverage reports 41 | htmlcov/ 42 | .tox/ 43 | .nox/ 44 | .coverage 45 | .coverage.* 46 | .cache 47 | nosetests.xml 48 | coverage.xml 49 | *.cover 50 | *.py,cover 51 | .hypothesis/ 52 | .pytest_cache/ 53 | 54 | # Translations 55 | *.mo 56 | *.pot 57 | 58 | # Django stuff: 59 | *.log 60 | local_settings.py 61 | db.sqlite3 62 | db.sqlite3-journal 63 | 64 | # Flask stuff: 65 | instance/ 66 | .webassets-cache 67 | 68 | # Scrapy stuff: 69 | .scrapy 70 | 71 | # Sphinx documentation 72 | docs/_build/ 73 | 74 | # PyBuilder 75 | target/ 76 | 77 | # Jupyter Notebook 78 | .ipynb_checkpoints 79 | 80 | # IPython 81 | profile_default/ 82 | ipython_config.py 83 | 84 | # pyenv 85 | .python-version 86 | 87 | # pipenv 88 | # According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control. 89 | # However, in case of collaboration, if having platform-specific dependencies or dependencies 90 | # having no cross-platform support, pipenv may install dependencies that don't work, or not 91 | # install all needed dependencies. 92 | #Pipfile.lock 93 | 94 | # PEP 582; used by e.g. github.com/David-OConnor/pyflow 95 | __pypackages__/ 96 | 97 | # Celery stuff 98 | celerybeat-schedule 99 | celerybeat.pid 100 | 101 | # SageMath parsed files 102 | *.sage.py 103 | 104 | # Environments 105 | .env 106 | .venv 107 | env/ 108 | venv/ 109 | ENV/ 110 | env.bak/ 111 | venv.bak/ 112 | 113 | # Spyder project settings 114 | .spyderproject 115 | .spyproject 116 | 117 | # Rope project settings 118 | .ropeproject 119 | 120 | # mkdocs documentation 121 | /site 122 | 123 | # mypy 124 | .mypy_cache/ 125 | .dmypy.json 126 | dmypy.json 127 | 128 | # Pyre type checker 129 | .pyre/ 130 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 593 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 594 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 595 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 596 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 597 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 598 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 599 | 600 | 16. Limitation of Liability. 601 | 602 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 610 | SUCH DAMAGES. 611 | 612 | 17. Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Kivy OpenCV Demo 2 | A simple demo program for using OpenCV on Android 3 | 4 | ![screenshot](pics/Screenshot_20211125-180744.jpg) 5 | 6 | ## Build with: 7 | > buildozer android debug deploy run 8 | 9 | ## Run (on desktop) with: 10 | > python main.py -m screen:one 11 | 12 | ## Manually deploy on Android with: 13 | > adb install -r bin/kivyopencvdemo-0.1-arm64-v8a-debug.apk 14 | 15 | ## Debug on Android with: 16 | > adb shell logcat -s python 17 | -------------------------------------------------------------------------------- /bin/kivyopencvdemo-0.1-arm64-v8a-debug.apk: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/4ndr3aR/kivy-opencv-demo/67f2046272b8a443752d47043e82c22f1e129a0d/bin/kivyopencvdemo-0.1-arm64-v8a-debug.apk -------------------------------------------------------------------------------- /buildozer.spec: -------------------------------------------------------------------------------- 1 | [app] 2 | 3 | # (str) Title of your application 4 | title = Kivy OpenCV Demo 5 | 6 | # (str) Package name 7 | package.name = kivyopencvdemo 8 | 9 | # (str) Package domain (needed for android/ios packaging) 10 | package.domain = it.cnr.imati.ge 11 | 12 | # (str) Source code where the main.py live 13 | source.dir = . 14 | 15 | # (list) Source files to include (let empty to include all the files) 16 | source.include_exts = py,png,jpg,kv,atlas,mp4 17 | 18 | # (list) List of inclusions using pattern matching 19 | #source.include_patterns = assets/*,images/*.png 20 | 21 | # (list) Source files to exclude (let empty to not exclude anything) 22 | #source.exclude_exts = spec 23 | 24 | # (list) List of directory to exclude (let empty to not exclude anything) 25 | #source.exclude_dirs = tests, bin 26 | 27 | # (list) List of exclusions using pattern matching 28 | #source.exclude_patterns = license,images/*/*.jpg 29 | 30 | # (str) Application versioning (method 1) 31 | version = 0.1 32 | 33 | # (str) Application versioning (method 2) 34 | # version.regex = __version__ = ['"](.*)['"] 35 | # version.filename = %(source.dir)s/main.py 36 | 37 | # (list) Application requirements 38 | # comma separated e.g. requirements = sqlite3,kivy 39 | requirements = python3,kivy,opencv 40 | 41 | # (str) Custom source folders for requirements 42 | # Sets custom source for any requirements with recipes 43 | # requirements.source.kivy = ../../kivy 44 | 45 | # (list) Garden requirements 46 | #garden_requirements = 47 | 48 | # (str) Presplash of the application 49 | #presplash.filename = %(source.dir)s/data/presplash.png 50 | 51 | # (str) Icon of the application 52 | #icon.filename = %(source.dir)s/data/icon.png 53 | 54 | # (str) Supported orientation (one of landscape, sensorLandscape, portrait or all) 55 | orientation = landscape 56 | 57 | # (list) List of service to declare 58 | #services = NAME:ENTRYPOINT_TO_PY,NAME2:ENTRYPOINT2_TO_PY 59 | 60 | # 61 | # OSX Specific 62 | # 63 | 64 | # 65 | # author = © Copyright Info 66 | 67 | # change the major version of python used by the app 68 | osx.python_version = 3 69 | 70 | # Kivy version to use 71 | osx.kivy_version = 1.9.1 72 | 73 | # 74 | # Android specific 75 | # 76 | 77 | # (bool) Indicate if the application should be fullscreen or not 78 | fullscreen = 1 79 | 80 | # (string) Presplash background color (for new android toolchain) 81 | # Supported formats are: #RRGGBB #AARRGGBB or one of the following names: 82 | # red, blue, green, black, white, gray, cyan, magenta, yellow, lightgray, 83 | # darkgray, grey, lightgrey, darkgrey, aqua, fuchsia, lime, maroon, navy, 84 | # olive, purple, silver, teal. 85 | #android.presplash_color = #FFFFFF 86 | 87 | # (list) Permissions 88 | #android.permissions = INTERNET 89 | android.permissions = CAMERA 90 | 91 | # (int) Target Android API, should be as high as possible. 92 | #android.api = 27 93 | 94 | # (int) Minimum API your APK will support. 95 | #android.minapi = 21 96 | 97 | # (int) Android SDK version to use 98 | #android.sdk = 20 99 | 100 | # (str) Android NDK version to use 101 | #android.ndk = 19b 102 | 103 | # (int) Android NDK API to use. This is the minimum API your app will support, it should usually match android.minapi. 104 | #android.ndk_api = 21 105 | 106 | # (bool) Use --private data storage (True) or --dir public storage (False) 107 | #android.private_storage = True 108 | 109 | # (str) Android NDK directory (if empty, it will be automatically downloaded.) 110 | #android.ndk_path = 111 | 112 | # (str) Android SDK directory (if empty, it will be automatically downloaded.) 113 | #android.sdk_path = 114 | 115 | # (str) ANT directory (if empty, it will be automatically downloaded.) 116 | #android.ant_path = 117 | 118 | # (bool) If True, then skip trying to update the Android sdk 119 | # This can be useful to avoid excess Internet downloads or save time 120 | # when an update is due and you just want to test/build your package 121 | # android.skip_update = False 122 | 123 | # (bool) If True, then automatically accept SDK license 124 | # agreements. This is intended for automation only. If set to False, 125 | # the default, you will be shown the license when first running 126 | # buildozer. 127 | # android.accept_sdk_license = False 128 | 129 | # (str) Android entry point, default is ok for Kivy-based app 130 | #android.entrypoint = org.renpy.android.PythonActivity 131 | 132 | # (str) Android app theme, default is ok for Kivy-based app 133 | # android.apptheme = "@android:style/Theme.NoTitleBar" 134 | 135 | # (list) Pattern to whitelist for the whole project 136 | #android.whitelist = 137 | 138 | # (str) Path to a custom whitelist file 139 | #android.whitelist_src = 140 | 141 | # (str) Path to a custom blacklist file 142 | #android.blacklist_src = 143 | 144 | # (list) List of Java .jar files to add to the libs so that pyjnius can access 145 | # their classes. Don't add jars that you do not need, since extra jars can slow 146 | # down the build process. Allows wildcards matching, for example: 147 | # OUYA-ODK/libs/*.jar 148 | #android.add_jars = foo.jar,bar.jar,path/to/more/*.jar 149 | 150 | # (list) List of Java files to add to the android project (can be java or a 151 | # directory containing the files) 152 | #android.add_src = 153 | 154 | # (list) Android AAR archives to add (currently works only with sdl2_gradle 155 | # bootstrap) 156 | #android.add_aars = 157 | 158 | # (list) Gradle dependencies to add (currently works only with sdl2_gradle 159 | # bootstrap) 160 | #android.gradle_dependencies = 161 | 162 | # (list) add java compile options 163 | # this can for example be necessary when importing certain java libraries using the 'android.gradle_dependencies' option 164 | # see https://developer.android.com/studio/write/java8-support for further information 165 | # android.add_compile_options = "sourceCompatibility = 1.8", "targetCompatibility = 1.8" 166 | 167 | # (list) Gradle repositories to add {can be necessary for some android.gradle_dependencies} 168 | # please enclose in double quotes 169 | # e.g. android.gradle_repositories = "maven { url 'https://kotlin.bintray.com/ktor' }" 170 | #android.add_gradle_repositories = 171 | 172 | # (list) packaging options to add 173 | # see https://google.github.io/android-gradle-dsl/current/com.android.build.gradle.internal.dsl.PackagingOptions.html 174 | # can be necessary to solve conflicts in gradle_dependencies 175 | # please enclose in double quotes 176 | # e.g. android.add_packaging_options = "exclude 'META-INF/common.kotlin_module'", "exclude 'META-INF/*.kotlin_module'" 177 | #android.add_gradle_repositories = 178 | 179 | # (list) Java classes to add as activities to the manifest. 180 | #android.add_activities = com.example.ExampleActivity 181 | 182 | # (str) OUYA Console category. Should be one of GAME or APP 183 | # If you leave this blank, OUYA support will not be enabled 184 | #android.ouya.category = GAME 185 | 186 | # (str) Filename of OUYA Console icon. It must be a 732x412 png image. 187 | #android.ouya.icon.filename = %(source.dir)s/data/ouya_icon.png 188 | 189 | # (str) XML file to include as an intent filters in tag 190 | #android.manifest.intent_filters = 191 | 192 | # (str) launchMode to set for the main activity 193 | #android.manifest.launch_mode = standard 194 | 195 | # (list) Android additional libraries to copy into libs/armeabi 196 | #android.add_libs_armeabi = libs/android/*.so 197 | #android.add_libs_armeabi_v7a = libs/android-v7/*.so 198 | #android.add_libs_arm64_v8a = libs/android-v8/*.so 199 | #android.add_libs_x86 = libs/android-x86/*.so 200 | #android.add_libs_mips = libs/android-mips/*.so 201 | 202 | # (bool) Indicate whether the screen should stay on 203 | # Don't forget to add the WAKE_LOCK permission if you set this to True 204 | #android.wakelock = False 205 | 206 | # (list) Android application meta-data to set (key=value format) 207 | #android.meta_data = 208 | 209 | # (list) Android library project to add (will be added in the 210 | # project.properties automatically.) 211 | #android.library_references = 212 | 213 | # (list) Android shared libraries which will be added to AndroidManifest.xml using tag 214 | #android.uses_library = 215 | 216 | # (str) Android logcat filters to use 217 | #android.logcat_filters = *:S python:D 218 | 219 | # (bool) Copy library instead of making a libpymodules.so 220 | #android.copy_libs = 1 221 | 222 | # (str) The Android arch to build for, choices: armeabi-v7a, arm64-v8a, x86, x86_64 223 | #android.arch = armeabi-v7a 224 | android.arch = arm64-v8a 225 | 226 | # (int) overrides automatic versionCode computation (used in build.gradle) 227 | # this is not the same as app version and should only be edited if you know what you're doing 228 | # android.numeric_version = 1 229 | 230 | # 231 | # Python for android (p4a) specific 232 | # 233 | 234 | # (str) python-for-android fork to use, defaults to upstream (kivy) 235 | #p4a.fork = kivy 236 | 237 | # (str) python-for-android branch to use, defaults to master 238 | #p4a.branch = master 239 | 240 | # (str) python-for-android git clone directory (if empty, it will be automatically cloned from github) 241 | #p4a.source_dir = 242 | 243 | # (str) The directory in which python-for-android should look for your own build recipes (if any) 244 | #p4a.local_recipes = 245 | 246 | # (str) Filename to the hook for p4a 247 | #p4a.hook = 248 | 249 | # (str) Bootstrap to use for android builds 250 | # p4a.bootstrap = sdl2 251 | 252 | # (int) port number to specify an explicit --port= p4a argument (eg for bootstrap flask) 253 | #p4a.port = 254 | 255 | 256 | # 257 | # iOS specific 258 | # 259 | 260 | # (str) Path to a custom kivy-ios folder 261 | #ios.kivy_ios_dir = ../kivy-ios 262 | # Alternately, specify the URL and branch of a git checkout: 263 | ios.kivy_ios_url = https://github.com/kivy/kivy-ios 264 | ios.kivy_ios_branch = master 265 | 266 | # Another platform dependency: ios-deploy 267 | # Uncomment to use a custom checkout 268 | #ios.ios_deploy_dir = ../ios_deploy 269 | # Or specify URL and branch 270 | ios.ios_deploy_url = https://github.com/phonegap/ios-deploy 271 | ios.ios_deploy_branch = 1.7.0 272 | 273 | # (str) Name of the certificate to use for signing the debug version 274 | # Get a list of available identities: buildozer ios list_identities 275 | #ios.codesign.debug = "iPhone Developer: ()" 276 | 277 | # (str) Name of the certificate to use for signing the release version 278 | #ios.codesign.release = %(ios.codesign.debug)s 279 | 280 | 281 | [buildozer] 282 | 283 | # (int) Log level (0 = error only, 1 = info, 2 = debug (with command output)) 284 | log_level = 2 285 | 286 | # (int) Display warning if buildozer is run as root (0 = False, 1 = True) 287 | warn_on_root = 1 288 | 289 | # (str) Path to build artifact storage, absolute or relative to spec file 290 | # build_dir = ./.buildozer 291 | 292 | # (str) Path to build output (i.e. .apk, .ipa) storage 293 | # bin_dir = ./bin 294 | 295 | # ----------------------------------------------------------------------------- 296 | # List as sections 297 | # 298 | # You can define all the "list" as [section:key]. 299 | # Each line will be considered as a option to the list. 300 | # Let's take [app] / source.exclude_patterns. 301 | # Instead of doing: 302 | # 303 | #[app] 304 | #source.exclude_patterns = license,data/audio/*.wav,data/images/original/* 305 | # 306 | # This can be translated into: 307 | # 308 | #[app:source.exclude_patterns] 309 | #license 310 | #data/audio/*.wav 311 | #data/images/original/* 312 | # 313 | 314 | 315 | # ----------------------------------------------------------------------------- 316 | # Profiles 317 | # 318 | # You can extend section / key with a profile 319 | # For example, you want to deploy a demo version of your application without 320 | # HD content. You could first change the title to add "(demo)" in the name 321 | # and extend the excluded directories to remove the HD content. 322 | # 323 | #[app@demo] 324 | #title = My Application (demo) 325 | # 326 | #[app:source.exclude_patterns@demo] 327 | #images/hd/* 328 | # 329 | # Then, invoke the command line with the "demo" profile: 330 | # 331 | #buildozer --profile demo android debug 332 | -------------------------------------------------------------------------------- /cam.kv: -------------------------------------------------------------------------------- 1 | BoxLayout: 2 | orientation: 'horizontal' 3 | 4 | KivyCamera: 5 | # source: "http://deeplearning.ge.imati.cnr.it/genova-5G/video/VID_20211031_162912.mp4-inference.mp4" 6 | # source: 0 7 | # source: "VID_20211031_162912.mp4-inference.mp4" 8 | source: "video/VID_20211031_162912.mp4-inference-short.mp4" 9 | -------------------------------------------------------------------------------- /main.py: -------------------------------------------------------------------------------- 1 | import kivy 2 | 3 | from kivy.app import App 4 | from kivy.core.window import Window 5 | from kivy.uix.boxlayout import BoxLayout 6 | from kivy.graphics.texture import Texture 7 | from kivy.uix.image import Image 8 | from kivy.uix.camera import Camera 9 | from kivy.lang import Builder 10 | from kivy.clock import Clock 11 | from kivy.logger import Logger 12 | from kivy.properties import ObjectProperty, NumericProperty 13 | 14 | import numpy as np 15 | import cv2 16 | 17 | media_source = 'video' 18 | #media_source = 'camera' # remember to manually grant permissions for this! 19 | 20 | class KivyCamera(Image): 21 | screen_resolution = (544, 544) 22 | if kivy.platform == 'android': 23 | image_resolution = (544, 544) 24 | else: 25 | image_resolution = (540, 540) 26 | 27 | source = ObjectProperty() 28 | fps = NumericProperty(60) 29 | counter = 0 30 | debug = 0 31 | 32 | def __init__(self, **kwargs): 33 | super(KivyCamera, self).__init__(**kwargs) 34 | self._capture = None 35 | if self.source is not None: 36 | self._capture = cv2.VideoCapture(self.source) 37 | 38 | self.screen_resolution = Window.size 39 | print(f'Screen size: {Window.size}, setting new screen resolution to: {self.screen_resolution}') 40 | 41 | Clock.schedule_interval(self.update, 1.0 / self.fps) 42 | 43 | def create_texture(self): 44 | self.texture = Texture.create(size=self.screen_resolution, colorfmt='rgb') 45 | self.texture_size = list(self.texture.size) 46 | if self.debug: 47 | print(f'Created GL texture with size: {self.texture_size}') 48 | 49 | def on_source(self, *args): 50 | if self._capture is not None: 51 | self._capture.release() 52 | self._capture = cv2.VideoCapture(self.source) 53 | 54 | @property 55 | def capture(self): 56 | return self._capture 57 | 58 | def update(self, dt): 59 | ret, frame = self.capture.read() 60 | if self.debug: 61 | print(f'GL texture is {self.texture} - size: {self.texture_size}') 62 | if ret: 63 | self.create_texture() 64 | if self.counter < 5: 65 | print(f'Showing frame: {frame.shape}') 66 | self.frame_to_screen(frame) 67 | else: 68 | print(f'OpenCV failed to get frame: {int(ret)}') 69 | 70 | def frame_to_screen(self, frame): 71 | if kivy.platform == 'android': 72 | frame_rgb = frame 73 | else: 74 | frame_rgb = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB) 75 | cv2.putText(frame_rgb, str(self.counter), (20, 50), cv2.FONT_HERSHEY_SIMPLEX, 1, (0, 255, 0), 2, cv2.LINE_AA) 76 | if self.counter == 0: 77 | print(f'frame_rgb: {frame_rgb[:3]}') 78 | self.counter += 1 79 | flipped = np.flip(frame_rgb, 0) 80 | if self.screen_resolution != self.image_resolution: 81 | aspect_ratio = self.image_resolution[0] / self.image_resolution[1] 82 | if self.counter < 5: 83 | print(f'{aspect_ratio = }') 84 | flipped = cv2.resize(flipped, (int(self.screen_resolution[1]*aspect_ratio), self.screen_resolution[1])) # I know, this one takes into account one case out of four or more (TODO) 85 | self.screen_resolution = (int(self.screen_resolution[1]*aspect_ratio), self.screen_resolution[1]) 86 | if self.counter < 5: 87 | print(f'Screen resolution != image resolution with aspect ratio: {aspect_ratio}, setting new screen resolution to: {self.screen_resolution}') 88 | buf = flipped.tostring() 89 | self.texture.blit_buffer(buf, colorfmt='rgb', bufferfmt='ubyte') 90 | 91 | class CamApp(App): 92 | pass 93 | 94 | 95 | 96 | 97 | 98 | 99 | 100 | class AndroidCamera(Camera): 101 | camera_resolution = (640, 480) 102 | counter = 0 103 | 104 | def _camera_loaded(self, *largs): 105 | self.texture = Texture.create(size=self.camera_resolution, colorfmt='rgb') 106 | self.texture_size = list(self.texture.size) 107 | print(f'Created GL texture with size: {self.texture_size}') 108 | 109 | def on_tex(self, *l): 110 | if self._camera._buffer is None: 111 | return None 112 | frame = self.frame_from_buf() 113 | self.frame_to_screen(frame) 114 | super(AndroidCamera, self).on_tex(*l) 115 | 116 | def frame_from_buf(self): 117 | w, h = self.resolution 118 | frame = np.frombuffer(self._camera._buffer.tostring(), 'uint8').reshape((h + h // 2, w)) # TODO: try to understand why the frame size has nothing to do with the original resolution 119 | print(f'{frame.shape = }') 120 | frame_bgr = cv2.cvtColor(frame, cv2.COLOR_YUV2BGR_NV21) 121 | return frame_bgr 122 | 123 | def frame_to_screen(self, frame): 124 | frame_rgb = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB) 125 | cv2.putText(frame_rgb, str(self.counter), (20, 50), cv2.FONT_HERSHEY_SIMPLEX, 1, (0, 255, 0), 2, cv2.LINE_AA) 126 | self.counter += 1 127 | flipped = np.flip(frame_rgb, 0) 128 | buf = flipped.tostring() 129 | self.texture.blit_buffer(buf, colorfmt='rgb', bufferfmt='ubyte') 130 | 131 | class MyLayout(BoxLayout): 132 | pass 133 | 134 | class MyApp(App): 135 | def build(self): 136 | return MyLayout() 137 | 138 | if __name__ == '__main__': 139 | if media_source == 'video': 140 | Builder.load_file("cam.kv") 141 | CamApp().run() 142 | else: 143 | Builder.load_file("myapplayout.kv") 144 | MyApp().run() 145 | 146 | 147 | -------------------------------------------------------------------------------- /myapplayout.kv: -------------------------------------------------------------------------------- 1 | 2 | orientation: 'horizontal' 3 | size: root.width, root.height 4 | 5 | AndroidCamera: 6 | index: 0 7 | resolution: self.camera_resolution 8 | allow_stretch: True 9 | play: True 10 | 11 | -------------------------------------------------------------------------------- /pics/Screenshot_20211125-180744.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/4ndr3aR/kivy-opencv-demo/67f2046272b8a443752d47043e82c22f1e129a0d/pics/Screenshot_20211125-180744.jpg -------------------------------------------------------------------------------- /video/VID_20211031_162912.mp4-inference-short.mp4: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/4ndr3aR/kivy-opencv-demo/67f2046272b8a443752d47043e82c22f1e129a0d/video/VID_20211031_162912.mp4-inference-short.mp4 --------------------------------------------------------------------------------