An improved description method of the bumpy texture

查看全文 作　　者：GAO RongHua KONG DeHui YIN [1]BaoCai 机构地区：[1]Beijing Municipal Key Laboratory of Multimedia and Intelligent Software, Beijing University of Technology, Beijing 100124, China 出　　处：《Science in China(Series F)》索引2009年第52卷第3期,共6页 基　　金：Supported partially by the National Natural Science Foundation of China (Grant Nos. 60533030, 60825203, 60572104);National High-Tech Re-search & Development Program of China (Grant No.2006AA01Z317);Science and Technology Development Program of Education Commission in Beijing (Grant No. KM200710005017) 摘　　要：Bump mapping is a texture-based rendering approach for simulating surface details to make its illumi- nation results have three-dimensional effects. The bumpy properties of an object are determined by height maps. But in the process of generating height maps, a problem arises, i.e. to get a correct value of the pixel height, empirical data should be calculated repeatedly, which proves very complicated, and meanwhile the realistic rendering effect is reduced, because the bumpy property is exaggerated in the height map. Therefore, in this paper, we present a method for describing the details of the bumpy tex- ture, where a new concept 'bumpy map' is introduced to replace the height map. Experimental results demonstrate that the bumpy details produced by the 'bumpy map' are more consistent with the original bumpy texture than by the method of height map. 关 键 词：纹理 高度图 绘制方法 凹凸映射 三维效果 照明效果 生成过程 颠簸