Introduction to OpenCV - build and install OpenCV on your computer
The Core Functionality (core module) - basic building blocks of the library
Image Processing (imgproc module) - image processing functions
Application utils (highgui, imgcodecs, videoio modules) - application utils (GUI, image/video input/output)
Camera calibration and 3D reconstruction (calib3d module) - extract 3D world information from 2D images
2D Features framework (feature2d module) - feature detectors, descriptors and matching framework
Deep Neural Networks (dnn module) - infer neural networks using built-in dnn module
Graph API (gapi module) - graph-based approach to computer vision algorithms building
Other tutorials (ml, objdetect, photo, stitching, video) - other modules (ml, objdetect, stitching, video, photo)
OpenCV iOS - running OpenCV on an iDevice
GPU-Accelerated Computer Vision (cuda module) - utilizing power of video card to run CV algorithms