@@ -1,2 +1,11 @@
# imageio
+## Usage
+
+```
+import imageio
+im = imageio.imread('imageio:astronaut.png')
+print(im.shape) # im 是一个 NumPy 数组 (512, 512, 3)
+imageio.imwrite('astronaut-gray.jpg', im[:, :, 0])
