Study and implementation of algorithm for pencil drawing automatic generation based on computer

Non-photorealistic rendering (NPR) as the iconology branch corresponding to photorealistic aims to generate artistic effect using computer. At present, NPR technology can successfully simulate oil painting, watercolor, cartoon, pencil drawing, etc. and has been widely applied in many fields. Pencil drawing is the monochrome that uses lines to present light and shade of objective image, and its rendering mainly includes detection and rendering of contour line and rendering of textures. This paper first introduced the research status of pencil drawing, then analyzed operator and improved algorithm based on effect implementation, used algorithm to rendering the input image into pencil drawing, and finally made the rendering effect closer to the practical drawing style of artists.