opencv/cxcore.go
func (img *IplImage) Get2D(x, y int) Scalar {
	ret := C.cvGet2D(unsafe.Pointer(img), C.int(y), C.int(x))
	return Scalar(ret)
}
func (img *IplImage) Get2D(x, y int) Scalar {
	ret := C.cvGet2D(unsafe.Pointer(img), C.int(y), C.int(x))
	return Scalar(ret)
}
/* Get2D return a specific element from a 2-dimensional matrix. */