功能确实很强大，可以直接使用，包括图像处理中的基础：打开、保存、退出、剪裁、反色、灰度、复制等等功能，很好的东西-Function is indeed very powerful, can be used directly, including image processing on the basis of: open, save, quit, cut, anti-color, grayscale, copy and so on, a very good thing