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260416，2509165013/hw2.py

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+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)
+
+print("原图：")
+print(img)
+
+white_count = np.sum(img == 255)
+black_count = np.sum(img == 0)
+print(f"\n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("\n水平翻转后：")
+print(img_flipped)
+
+img_rotated = np.rot90(img, k=1)  
+print("\n逆时针旋转90度后：")
+print(img_rotated)