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)
print()

white_pixels = np.sum(img == 255)
black_pixels = np.sum(img == 0)

print(f"白色像素(255)的数量：{white_pixels}")
print(f"黑色像素(0)的数量：{black_pixels}")
print()


flipped_horizontal = np.fliplr(img)
print("水平翻转后的图像：")
print(flipped_horizontal)
print()

rotated_ccw = np.flipud(img.T)

print("逆时针旋转90度后的图像:")
print(rotated_ccw)