Main modules

Sphinx-rendered API reference. Each entry below is a module’s umbrella @defgroup; sub-pages mirror the Doxygen subgroup hierarchy.

• calib. Camera Calibration

• core. Core functionality

• dnn. Deep Neural Network module

• features. Features Framework

• flann. Clustering and Search in Multi-Dimensional Spaces

• geometry. Computational Geometry Primitives Module

• highgui. High-level GUI

• imgcodecs. Image file reading and writing

• imgproc. Image Processing

• objdetect. Object Detection

• photo. Computational Photography

• ptcloud. Point Cloud Processing

• stereo. Stereo Correspondence

• stitching. Images stitching

• video. Video Analysis

• videoio. Video I/O

Learn about HAL

OpenCV ships a Hardware Acceleration Layer that lets hardware vendors inject tuned, silicon-specific implementations behind a stable C interface. See OpenCV Hardware Acceleration Layer (HAL).