Mediapipe

* New Features
- [YT8m Feature extractor](https://github.com/google/youtube-8m/tree/master/feature_extractor) for [Kaggle challenge](https://www.kaggle.com/c/youtube8m-2019) for [ICCV workshop](https://research.google.com/youtube8m/workshop2019/index.html)
- [Deepmind Kinetics I3D](https://github.com/deepmind/kinetics-i3d) [pre-processing pipeline](https://github.com/google/mediapipe/blob/master/mediapipe/examples/desktop/media_sequence/kinetics_dataset.py)
* Bug fixes
- OpenCVVideoDecoderCalculator for [issue 57](https://github.com/google/mediapipe/issues/57)
* Documentation
- Fix to Android studio setup instruction for [issue 65](https://github.com/google/mediapipe/issues/65)
- Fix to iOS setup bundle ID for [issue 50](https://github.com/google/mediapipe/issues/50)
- Fix to Android NDK location for [issue 98](https://github.com/google/mediapipe/issues/98)

* Subgraph API in C++
* Graph Execution API in Obj-C
* [Updated previous mobile examples with iOS](https://github.com/google/mediapipe/blob/master/mediapipe/docs/examples.md)
- Edge detection with GPU (Hello World! on iOS )
- Object Detection with GPU
- Face Detection with GPU
- Face Detection with CPU
* 2 new mobile examples with Android & iOS
- [Hand detection with GPU](https://github.com/google/mediapipe/blob/master/mediapipe/docs/hand_detection_mobile_gpu.md)
- [Hand tracking with GPU](https://github.com/google/mediapipe/blob/master/mediapipe/docs/hand_tracking_mobile_gpu.md)
* [A new data preprocessing graph for preparing kinetics dataset](https://github.com/google/mediapipe/blob/master/mediapipe/examples/desktop/media_sequence/kinetics_dataset.py)
* [Audio Calculators - decoding, resampling, spectrogram, mfcc](https://github.com/google/mediapipe/tree/master/mediapipe/calculators/audio)
* [Visualizer](https://viz.mediapipe.dev)
- Multi-tab support
- Subgraph visualization
* [Documentation](https://github.com/google/mediapipe/tree/master/mediapipe/docs)
- Added iOS section for edge detection, face detection, and object detection
- [Google AI blog post on hand tracking](https://mediapipe.page.link/handgoogleaiblog)
- Hand detection
- Hand tracking
- [Hand model card](https://mediapipe.page.link/handmc)
- Subgraph visualization

Major Features
* Calculator API in C++
* Graph Construction API in ProtoBuf
* OpenGL ES support for Calculator API
* Graph Execution API in C++
* Graph Execution API in Java (Android)
* 5 Desktop and Android examples (Graphs, Calculators, TF/TFlite models)
- Edge detection on GPU for Android (Hello World! on Android)
- Object Detection on CPU and GPU for Android
- Face Detection on GPU for Android
- Hair Segmentation on GPU for Android
- Object Detection on Desktop (No desktop GPU support)
* Visualizer launched at https://viz.mediapipe.dev
* Dataset preprocessing using MediaSequence
* Set of 59 calculators for core framework, image, tensorflow, tflite, util, video
* Initial v0.5 documentation launched at https://docs.mediapipe.dev