图片保存，读取

使用OpenCV

• 读取

cv2.imread(image_path)

• 保存

cv2.imwrite("path", image_name)

使用PIL

• 读取

Image.open('images/city_128.png').convert('RGB')

• 保存

img = Image.fromarray(img_norm, "RGB")
img.save(name, format='PNG')