func (img *IplImage) GetMat() *Mat {
	var null C.int
	tmp := CreateMat(img.Height(), img.Width(), CV_32S)
	m := C.cvGetMat(unsafe.Pointer(img), (*C.CvMat)(tmp), &null, C.int(0))
	return (*Mat)(m)
}
func (img *IplImage) GetMat() *Mat {
	var null C.int
	tmp := CreateMat(img.Height(), img.Width(), CV_32S)
	m := C.cvGetMat(unsafe.Pointer(img), (*C.CvMat)(tmp), &null, C.int(0))
	return (*Mat)(m)
}
/* GetMat returns the matrix header for an image.*/