func ConvertScale(a, b *IplImage, scale, shift float64) {
	C.cvConvertScale(unsafe.Pointer(a), unsafe.Pointer(b), C.double(scale), C.double(shift))
}
func ConvertScale(a, b *IplImage, scale, shift float64) {
	C.cvConvertScale(unsafe.Pointer(a), unsafe.Pointer(b), C.double(scale), C.double(shift))
}
//CVAPI(void) cvLaplace( const CvArr* src,
//                       CvArr* dst,
//                       int aperture_size CV_DEFAULT(3) );
/*
ConvertScale converts one image to another with optional linear transformation.
*/