func Add(src1, src2, dst *IplImage) {
	AddWithMask(src1, src2, dst, nil)
}
func Add(src1, src2, dst *IplImage) {
	AddWithMask(src1, src2, dst, nil)
}
/****************************************************************************************\
*                                Math operations                              *
\****************************************************************************************/
// Calculates the per-element sum of two arrays.
//   dst = src1 + src2