计算机应用 ›› 2005, Vol. 25 ›› Issue (09): 2123-2125.DOI: 10.3724/SP.J.1087.2005.02123

• 图形图像处理 • 上一篇    下一篇

基于图像的三维光照效果的动态重现

韩慧健1,徐琳2   

  1. 1.山东经济学院计算机科学与技术系; 2.国家自然科学基金委员会信息科学部
  • 发布日期:2011-04-11 出版日期:2005-09-01
  • 基金资助:

    国家自然科学基金资助项目(60403036);;山东经济学院科研基金资助项目(04081206)

Dynamically representing 3D lighting effect based on photos

HAN Hui-jian1,XU Lin2   

  1. 1.Department of Computer Science & Technology,Shandong Economic University,Jinan Shandong 250014,China;2.Department of Information Sciences,National Natural Science Foundation of China,Beijing 100085,China
  • Online:2011-04-11 Published:2005-09-01

摘要: 传统图像纹理可以给虚拟物体增加丰富的细节,但由于纹理是在特定光照条件下获取的照片,当虚拟光照条件变化时,纹理细节缺少随之动态变化的真实感。凹凸纹理通过扰动法向量可以实现细节的基本阴影变化,但生成一张真实照片的凹凸纹理是困难的。文中介绍了BRDF和BTF的概念和理论,提出了一种基于图像的适用于漫反射物体表面细节动态重现的方法,可以使映射后的纹理在不同虚拟光照条件下呈现动态变化的效果。

关键词: 纹理映射, BRDF, BTF, 纹理合成

Abstract: Traditional image texture mapping can increase abundant details for virtual object.As virtual lighting condition varies,textures lack realistic representation with dynamic lighting changes.Bump mapping can get basic shadow varying by disturbing normal vectors.But it is difficult for a realistic photo to create a Bump map.Some concepts and theories of BRDF & BTF were described.An image-based method was offered,which could dynamically represent surface detail of diffuse objects.Using it,the mapped textures can represent dynamical effect in different virtual lighting.

Key words: texture mapping, BRDF, BTF, textures synthesizing

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