opencv/cxcore.go
func GetRows(arr Arr, submat *Mat, start_row, end_row, delta_row int) *Mat {
	mat_new := C.cvGetRows(
		unsafe.Pointer(arr),
		(*C.CvMat)(submat),
		C.int(start_row),
		C.int(end_row),
		C.int(delta_row),
	)
	return (*Mat)(mat_new)
}
func GetRows(arr Arr, submat *Mat, start_row, end_row, delta_row int) *Mat {
	mat_new := C.cvGetRows(
		unsafe.Pointer(arr),
		(*C.CvMat)(submat),
		C.int(start_row),
		C.int(end_row),
		C.int(delta_row),
	)
	return (*Mat)(mat_new)
}
//#define cvGetSubArr cvGetSubRect
/* Selects row span of the input array: arr(start_row:delta_row:end_row,:)
   (end_row is not included into the span). */