OpenCV:features2d

lastmod 2026-11-10created 2022-06-146 edits

features2d is the OpenCV module for working with keypoints in 2D images. Keypoint detectors and descriptor extractors such as SIFT, ORB, and AKAZE are provided through the common cv::Feature2D interface, and the module also includes DescriptorMatcher (BFMatcher, FLANN) for finding correspondences between descriptors and functions for drawing keypoints and match results. It is used as a basic step for image registration, panoramas, object recognition, tracking, and more.

2D Features Framework

cv::Feature2D

• 2D Features framework (feature2d module)
• cv::Feature2D Class Reference

Categories

• Feature Detection and Description
• Descriptor Matchers
• Drawing Function of Keypoints and Matches
• Object Categorization
• Hardware Acceleration Layer

Favorite site

• OpenCV 2.4.13.0 documentation » OpenCV API Reference » features2d. 2D Features Framework » Common Interfaces of Feature Detectors