Fisheye camera model
lastmod 2026-11-10created 2024-07-033 edits
Fisheye camera model is a camera model that mathematically describes the projection of a fisheye lens with a field of view close to 180 degrees. Because in the pinhole model the image moves infinitely far away at wide angles, projections such as equidistant projection, which determine image distance from the angle of incidence, are used instead, with polynomial distortion coefficients added on top for correction. OpenCV's cv::fisheye namespace provides calibration and undistortion functions for this model.