Simulation Research of Sketch Simulation Technology Based on Non Photorealistic Rendering

Abstract

Through the in-depth study of many sketch style images, this paper aims at the existing computer non photorealistic rendering (NPR) technology about the realization effect of sketch drawing method and hand-painted style. Then a sketch texture improvement scheme is designed. With the help of image sharpening, neon red processing, image segmentation, LIC line integral convolution and other knowledge, the automatic generation method of pencil sketch in NPR is systematically analyzed. The direction field of the whole image is generated by using the direction field theory and the active shape model positioning effect, and the texture direction in the image, especially the muscle texture information of the face, is extracted. Finally, the motion blur method is used to simulate pencil texture instead of the traditional line integral convolution method. It can be seen from the experimental results that the pencil texture simulated by our method is very strong, which is close to the hand drawing style. Without user interaction, it is suitable for multiple applications such as animation production.