python cv2 opencv手写一个棋盘格

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有时候我们需要用棋盘格测试我们写的代码或者用于校准相机。虽然opencv里面有自带的代码。但是了解下如何写一个棋盘格也是有必要的。下图是一个简单的实现。

import cv2
import numpy as np
checker_img = np.zeros((320,320))
block_width = 320//8
black_block = np.full((block_width,block_width),255)
for row in range(8):
    for col in range(8):
        if (row+col)%2==0:
            row_begin = row*block_width
            row_end = row_begin+block_width
            col_begin = col*block_width
            col_end = col_begin+block_width
            checker_img[row_begin:row_end,col_begin:col_end] = black_block
cv2.imwrite("checker_board.jpg",checker_img)
cv2.imshow("checker_board",checker_img)
cv2.waitKey(0)