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"1. 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("\n2. 水平翻转后:")
print(img_flipped)
img_rotated = np.fliplr(img.T)
print("\n3. 逆时针旋转90度后:")
print(img_rotated)