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ljh.py

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+import numpy as np
+
+image = np.array([
+    [100, 150, 200],
+    [80, 120, 180],
+    [60, 90, 140]
+], dtype=np.uint8)
+
+print("原图：")
+print(image)
+print("-" * 20)
+
+
+image_dark = image - 20
+image_dark = np.clip(image_dark, 0, 255)  
+print("变暗20后：")
+print(image_dark)
+print("-" * 20)
+
+
+image_crop = image[0:2, 0:2]
+print("裁剪左上角2×2后：")
+print(image_crop)
+print("-" * 20)
+
+
+image_flip = np.fliplr(image)
+print("水平翻转后：")
+print(image_flip)