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)

print("原图：")
print(img)

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

img_flipped = np.fliplr(img)
print("\n水平翻转后：")
print(img_flipped)

img_rotated = np.rot90(img, k=1)  
print("\n逆时针旋转90度后：")
print(img_rotated)