Can I set transparent pixels with the function to warp image perspective?
cvWarpPerspective( src, dst, map_matrix, CV_INTER_LINEAR+CV_WARP_FILL_OUTLIERS, cvScalarAll(0) );
the last parameter cvScalarAll(0) set the background pixels (usually the corners of the output image, since they remains empty once the image is warped).
At the moment is 0. I would like those pixels being transparent (I'm saving the file as png).
thanks
