I am converting them using
src2.convertTo(src2, CV_32FC3, 1.0, 0.0);
src.convertTo(src, CV_32FC3, 1.0, 0.0);
// doing oidn stuf
// then converting back
src2.convertTo(src2, CV_32FC4, 1.0, 0.0);
src.convertTo(src, CV_32FC4 1.0, 0.0);
Should I be doing something else?