完成作业3-1-3

练习2.py

@@ -0,0 +1,30 @@
+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)
+print()
+
+white_pixels = np.sum(img == 255)
+black_pixels = np.sum(img == 0)
+
+print(f"白色像素(255)的数量：{white_pixels}")
+print(f"黑色像素(0)的数量：{black_pixels}")
+print()
+
+
+flipped_horizontal = np.fliplr(img)
+print("水平翻转后的图像：")
+print(flipped_horizontal)
+print()
+
+rotated_ccw = np.flipud(img.T)
+
+print("逆时针旋转90度后的图像:")
+print(rotated_ccw)