Remapping
lastmod 2026-11-10created 2023-10-242 edits
Remapping is an image processing technique that creates a new image by moving each pixel of an image to a different location according to a given mapping function. Because it builds and applies a map holding, for each coordinate of the output image, the coordinate to fetch from the source, it can express arbitrary geometric transformations such as horizontal flipping, downscaling, and fisheye lens distortion correction. In OpenCV the cv2.remap function does this, applying interpolation when coordinates are not integers.