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Object shadow computation is a critical issue for object rendering in image processing,and thus it is an impor— tant research issue in image processing field.In order to further improve the efficiency of shadow rendering,this paper proposed a clustering based object shadow recognition algorithm.We represented each light as a sphere according tO its attenuation range,classified lights into different classes while the distance between them extended the predefined mini— mum distance,and applied 3 top—down hierarchal clustering method for lights.During the process of clustering,the at— tenuation range of light increases linearly with the distance between light and the light source.After clustering the lights into different classes,we rendered lights of a class by the same texture,and thus,the efficiency of rendering shadow in an image is improved largely.Finally,we validated the efficiency of our algorithm according to some experiments.

基于聚类方法的对象阴影识别方法研究 (Clustering Based Object Shadow Recognition Algorithm).