摘要
针对许多边折叠网格简化算法在模型进行大规模简化后,不能很好地保持原始模型的重要几何特征,从而产生较严重的视觉失真现象的问题,提出了2种改进的二次误差测度边折叠方法．定义2种三角形重要度并嵌入到原始Garland的二次误差测度中,使得误差测度不仅能度量距离偏差,而且能反映模型局部表面几何变化．结果表明,新的算法在大规模简化后仍然能保留相当多的重要几何特征,降低了视觉失真．
After drastic simplification process, most of the existing simplification algorithms based on edge collapse do not preserve important shape features of the original model very well and lead to visual distortion. This paper presents two edge-collapse based algorithms using improved quadric error metrics. Two important degrees of a triangle are given and embedded into the original Garland＇ s quadric error metrics, so that the metrics can not only measure distance error but also reflect geometric variations of local surface. The experimental results show that the novel algorithms can preserve quite a number of important shape features and reduce visual distortion even after performing drastic level of simplification.
出处
《北京工业大学学报》
EI
CAS
CSCD
北大核心
2007年第7期731-736,共6页
Journal of Beijing University of Technology
基金
国家自然科学基金(60572104
60533030)
北京市自然科学基金(4061001).
关键词
计算机图形学
表面简化
迭代方法
边折叠
二次误差测度
computer graphics
surface simplification
iterative methods
edge collapse
quadric error metrics
