完

lx1

@@ -0,0 +1,22 @@
+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)

lx2

@@ -0,0 +1,11 @@
+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)
+
+white_count = np.sum(img == 255)
+black_count = np.sum(img == 0)