C++ implementation of an allRGB filter with OpenCV.
This program provides transformer and a checker.
The program targets an input image, checks that it has 2²⁴ colors, or scales it to a picture with enough pixels. Once the given image has 2²⁴ colors, each color is replaced with itself (if not already chosen), or the closest available.
The colors are stored in an octree, it allows a computation of the closest availaible color within an O(log(N)) complexity.
The --check option allows you to not transform an image to its allRGB
equivalent, but to check if a picture does contain all 2²⁴ pictures only once.