import numpy as np


img = np.array([
    [255, 255, 0, 0],
    [255, 255, 0, 0],
    [0, 0, 255, 255],
    [0, 0, 255, 255]
], dtype=np.uint8)


white_count = np.sum(img == 255)
black_count = np.sum(img == 0)
print(f"白色像素(255)数量：{white_count}")
print(f"黑色像素(0)数量：{black_count}")
print("-" * 20)


img_flip = np.fliplr(img)
print("水平翻转后的图像：")
print(img_flip)
print("-" * 20)


img_transpose = img.T
img_rot90_ccw = np.fliplr(img_transpose)
print("逆时针旋转90度后的图像：")
print(img_rot90_ccw)