图像平移只是改变图像在屏幕上的位置，图像本身并不发生变化。

　　假设原图像区域左上角坐标为(x0, y0)，右下角坐标为(x1, y1)，将图像分别沿x和y轴平移dx和dy，则新图像的左上角坐标为(x0 ＋ dx, y0 ＋ dy)，右下角坐标为(x1 ＋ dx, y1 ＋ dy)。-image translation is only a change in the image on the screen location, image itself is not changing. Assuming the original image coordinates of the upper left corner of the region (x0, y0), the lower right coordinates (x1, y1), image along the x and y axis translation dx and dy, new images in the upper left hand corner coordinates (x0 + dx. y0 + dy), the lower right coordinates (x1 + dx, dy + y1).