import numpy as np

image = np.array([
    [100, 150, 200],
    [80,  120, 180],
    [60,  90,  140]
], dtype=np.uint8)

print("原图：")
print(image)

image_dark = image - 20
print("变暗20: ")
print(image_dark)

image_crop = image[0:2, 0:2]
print("裁剪左上角: ")
print(image_crop)

image_flip = np.fliplr(image)
print("水平翻转: ")
print(image_flip)