说明：  方格识别算法：输入具有外部轮廓和外部标记的九宫格图像，标记设定在右上角，个小格的位置从左到右，从下到上一次表示成0-8位的二进制数，其中黑—1，白—0.输出对应的十进制数，对任意角度放置的图像能准确识别。
(Grid recognition algorithm: Enter an external contour and external marking squares image, mark set at the upper right corner, a small grid position from left to right, from bottom to top into a 0-8 first express-bit binary number, in which black-1,-0 white. output corresponding to a decimal number, for any angle to place the image can accurately identify.)