import numpy as np
image = np.array([
    [100,150,200],
    [80,20,180],
    [60,90,140],
],dtype=np.uint8)

print("原图：")
print(image)

dark_image = np.clip(image - 20, 0, 255).astype(np.uint8)
print("\n变暗20后：")
print(dark_image)

crop_image = image[0:2, 0:2]
print("\n裁剪左上角2×2区域：")
print(crop_image)

flip_image = np.fliplr(image)
print("\n水平翻转后：")
print(flip_image)