完成作业一:3-1-3
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29
0416.py
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29
0416.py
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import numpy as np
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# 1. 定义原始3×3灰度图像
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image = np.array([
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[100, 150, 200],
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[80, 120, 180],
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[60, 90, 140]
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], dtype=np.uint8)
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print("原图:")
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print(image)
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print("-" * 20)
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# 2. 变暗20:每个像素值减20(uint8会自动截断负数,这里所有值减20后均为正,无溢出)
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image_dark = image - 20
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print("变暗20后:")
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print(image_dark)
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print("-" * 20)
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# 3. 裁剪左上角2×2区域:image[0:2, 0:2]
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image_crop = image_dark[0:2, 0:2]
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print("裁剪左上角2×2后:")
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print(image_crop)
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print("-" * 20)
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# 4. 水平翻转:使用np.fliplr()
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image_flip = np.fliplr(image_crop)
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print("水平翻转后:")
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print(image_flip)
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