说明：  在图像非真实感艺术效果处理中，素描风格是一种非常典型的效果，并且应用也越来越广泛，受到广大人士的喜爱。对图像进行素描效果处理，一方面可以用于图像的识别，一方面可以达到艺术效果。能够对输入的图像、照片实现素描转换
(In the image non-photorealistic artistic effect processing, the sketch style is a very typical effect, and the application is more and more widely used, which is loved by the majority of people. The image processing effect on the image can be used for image recognition on the one hand, and artistic effect on the other hand. Ability to convert sketches of imported images and photos)