Papers by Author: Yao Li

Abstract: In the field of virtual reality, tree modeling and rendering technique is a hotspot. This paper summarizes the current basic methods of tree modeling and rendering. At first, we present basic principles of making tree models, then show the two methods of tree modeling and rendering used in game scenes in virtual reality. One is the tree modeling technique based on 3Dmax, the other is the tree rendering technique based on OpenGL. At last we give the application examples of these two methods and compare the two methods in navigation system project.

Abstract: This paper proposes a novel algorithm for the automatic generation of pencil drawing from digital image. We use multi-scale edge detector to construct an outline map according to the structural importance. Using strokes as the major building blocks, we smooth the boundary and rendering outline according to the pencil sketch style. Then, tone rendering is carried out to convey both the tone and textures of the original image. Experimental results on natural scenery and architectural scenery images show that the pencil sketch drawings produced by our method are of good visual effects. Besides, the implementation require less than 1 second on the image with 400*300 pixels.