• Introduction
• OpenCV Tutorials
• OpenCV-Python Tutorials
• OpenCV.js Tutorials
• Tutorials for contrib modules
• Frequently Asked Questions
• Bibliography
• Main modules:
  • core. Core functionality
  • imgproc. Image Processing
  • imgcodecs. Image file reading and writing
  • videoio. Video I/O
  • highgui. High-level GUI
  • video. Video Analysis
  • calib3d. Camera Calibration and 3D Reconstruction
  • features2d. 2D Features Framework
  • objdetect. Object Detection
  • dnn. Deep Neural Network module
  • ml. Machine Learning
  • flann. Clustering and Search in Multi-Dimensional Spaces
  • photo. Computational Photography
  • stitching. Images stitching
  • gapi. Graph API
• Extra modules:
  • alphamat. Alpha Matting
  • aruco. Aruco markers, module functionality was moved to objdetect module
  • bgsegm. Improved Background-Foreground Segmentation Methods
  • bioinspired. Biologically inspired vision models and derivated tools
  • cannops. Ascend-accelerated Computer Vision
  • ccalib. Custom Calibration Pattern for 3D reconstruction
  • cudaarithm. Operations on Matrices
  • cudabgsegm. Background Segmentation
  • cudacodec. Video Encoding/Decoding
  • cudafeatures2d. Feature Detection and Description
  • cudafilters. Image Filtering
  • cudaimgproc. Image Processing
  • cudalegacy. Legacy support
  • cudaobjdetect. Object Detection
  • cudaoptflow. Optical Flow
  • cudastereo. Stereo Correspondence
  • cudawarping. Image Warping
  • cudev. Device layer
  • cvv. GUI for Interactive Visual Debugging of Computer Vision Programs
  • datasets. Framework for working with different datasets
  • dnn_objdetect. DNN used for object detection
  • dnn_superres. DNN used for super resolution
  • dpm. Deformable Part-based Models
  • face. Face Analysis
  • fastcv. Module-wrapper for FastCV hardware accelerated functions
  • freetype. Drawing UTF-8 strings with freetype/harfbuzz
  • fuzzy. Image processing based on fuzzy mathematics
  • hdf. Hierarchical Data Format I/O routines
  • hfs. Hierarchical Feature Selection for Efficient Image Segmentation
  • img_hash. The module brings implementations of different image hashing algorithms.
  • intensity_transform. The module brings implementations of intensity transformation algorithms to adjust image contrast.
  • julia. Julia bindings for OpenCV
  • line_descriptor. Binary descriptors for lines extracted from an image
  • mcc. Macbeth Chart module
  • optflow. Optical Flow Algorithms
  • ovis. OGRE 3D Visualiser
  • phase_unwrapping. Phase Unwrapping API
  • plot. Plot function for Mat data
  • quality. Image Quality Analysis (IQA) API
  • rapid. silhouette based 3D object tracking
  • reg. Image Registration
  • rgbd. RGB-Depth Processing
  • saliency. Saliency API
  • sfm. Structure From Motion
  • shape. Shape Distance and Matching
  • signal. Signal Processing
  • stereo. Stereo Correspondance Algorithms
  • structured_light. Structured Light API
  • superres. Super Resolution
  • surface_matching. Surface Matching
  • text. Scene Text Detection and Recognition
  • tracking. Tracking API
  • videostab. Video Stabilization
  • viz. 3D Visualizer
  • wechat_qrcode. WeChat QR code detector for detecting and parsing QR code.
  • xfeatures2d. Extra 2D Features Framework
  • ximgproc. Extended Image Processing
  • xobjdetect. Extended object detection
  • xphoto. Additional photo processing algorithms