- Alpha Matting 
- Aruco markers, module functionality was moved to objdetect module 
- Improved Background-Foreground Segmentation Methods 
- Biologically inspired vision models and derivated tools 
- Camera Calibration and 3D Reconstruction 
- Custom Calibration Pattern for 3D reconstruction 
- Core functionality 
- Operations on Matrices 
- Background Segmentation 
- Video Encoding/Decoding 
- Feature Detection and Description 
- Image Filtering 
- Image Processing 
- Object Detection 
- Optical Flow 
- Stereo Correspondence 
- Image Warping 
- GUI for Interactive Visual Debugging of Computer Vision Programs 
- Deep Neural Network module 
- DNN used for super resolution 
- Deformable Part-based Models 
- Face Analysis 
- 2D Features Framework 
- Clustering and Search in Multi-Dimensional Spaces 
- Drawing UTF-8 strings with freetype/harfbuzz 
- Image processing based on fuzzy mathematics 
- \defgroup gapi G-API framework 
- Hierarchical Data Format I/O routines 
- Hierarchical Feature Selection for Efficient Image Segmentation 
- High-level GUI 
- The module brings implementations of different image hashing algorithms. 
- Image file reading and writing 
- Image Processing 
- The module brings implementations of intensity transformation algorithms to adjust image contrast. 
- Binary descriptors for lines extracted from an image 
- Macbeth Chart module 
- Machine Learning 
- Object Detection 
- Optical Flow Algorithms 
- OGRE 3D Visualiser 
- Phase Unwrapping API 
- Computational Photography 
- Reexported platform types that are used by OpenCV 
- Plot function for Mat data 
- silhouette based 3D object tracking 
- RGB-Depth Processing 
- Saliency API 
- Structure From Motion 
- Shape Distance and Matching 
- Stereo Correspondance Algorithms 
- Images stitching 
- Structured Light API 
- Super Resolution 
- Surface Matching 
- Scene Text Detection and Recognition 
- Tracking API 
- Video Analysis 
- Video I/O 
- Video Stabilization 
- 3D Visualizer 
- WeChat QR code detector for detecting and parsing QR code. 
- Extra 2D Features Framework 
- Extended Image Processing 
- Extended object detection 
- Additional photo processing algorithms