Hi, I want to build a lookup table to use with inverse perspective mapping. Instead of applying warpPerspective with the transform matrix on each frame, I want to use a lookup table (LUT).
Right now I use the following code to generate the transformation matrix
src.put(0, 0, 200,260, 340,260, 440,330, 40,330);
dst.put(0, 0, 220,190, 400,190, 400,400, 220,400);
m = new Mat(3, 3, CvType.CV_32FC1);
m = Imgproc.getPerspectiveTransform(src, dst);
In the onCameraFrame() I apply the warpPerspective() function. How can I build a LUT knowing some input pixels on the original frame and their correspondences in the output frame, and knowing the transfromation matrix??