opencv/cv.go
func CvtColor(src, dst *IplImage, code int) {
	C.cvCvtColor(unsafe.Pointer(src), unsafe.Pointer(dst), C.int(code))
}
func CvtColor(src, dst *IplImage, code int) {
	C.cvCvtColor(unsafe.Pointer(src), unsafe.Pointer(dst), C.int(code))
}
//CVAPI(void)  cvConvertScale( const CvArr* src,
//                             CvArr* dst,
//                             double scale CV_DEFAULT(1),
//                             double shift CV_DEFAULT(0) );
/* Converts input array pixels from one color space to another */