Tutorials for contrib modules

• aruco. ArUco marker detection (aruco module)
• bgsegm. Tutorials for bgsegm module
• bioinspired. Discovering the human retina and its use for image processing
• ccalib. Multi-camera Calibration
• ccalib. Omnidirectional Camera Calibration
• cvv. Interactive Visual Debugging of Computer Vision applications
• dnn_objdetect. Object Detection using CNNs
• face. Tutorials for face module
• face. Tutorial on Facial Landmark Detector API
• fuzzy. Fuzzy image processing tutorials
• hdf. The Hierarchical Data Format (hdf) I/O
• line_descriptor. Line Features Tutorial
• phase_unwrapping. Phase Unwrapping tutorial
• sfm. Structure From Motion
• structured_light. Structured Light tutorials
• text. Text module
• tracking. Customizing the CN Tracker
• tracking. Introduction to OpenCV Tracker
• tracking. Using MultiTracker
• ximgproc. Disparity map post-filtering
• ximgproc. Structured forests for fast edge detection
• ximgproc. Structured forest training
• xphoto. Training the learning-based white balance algorithm