func SubtractWithMask(src1, src2, dst, mask *IplImage) {
	C.cvSub(
		unsafe.Pointer(src1),
		unsafe.Pointer(src2),
		unsafe.Pointer(dst),
		unsafe.Pointer(mask),
	)
}
func SubtractWithMask(src1, src2, dst, mask *IplImage) {
	C.cvSub(
		unsafe.Pointer(src1),
		unsafe.Pointer(src2),
		unsafe.Pointer(dst),
		unsafe.Pointer(mask),
	)
}
func SubtractWithMask ( src1 , src2 , dst , mask * IplImage ) { C . cvSub ( unsafe . Pointer ( src1 ) , unsafe . Pointer ( src2 ) , unsafe . Pointer ( dst ) , unsafe . Pointer ( mask ) , ) }
// Calculates the per-element difference between two arrays with a mask.
//   dst = src1 - src2
Calculates the per - element difference between two arrays with a mask . dst = src1 - src2