Abstract: At present，many model simplified algorithms can not guarantee the visual characteristics of the simplified model，resulting in serious visual distortion.To solve the issues，this paper presents a model simplified algorithm，which solves the reflection of the vertex Convexo-Concave attribute by introducing the vertex curvature attribute factor，and maintains the geometry features of the model commendably by restricting the creation of long-narrow triangular，and keeps the texture features of model by signing the triangular whose color has changed distinctly，and resolves the visual affection of the error accumulation by computing the data which are in both the queue storing the edge collapse costs and the queue noting the changes of edges，so that the visual characteristics of the simplified model are maintained.The experiment shows that the algorithm is efficient，reliable，can maintain the visual characteristics of the model better.

Key words: edge collapse, level-of-detail, long-narrow triangular, color-difference triangle, texture

摘要： 目前，很多模型简化算法在进行大规模简化后并不能很好保证模型的视觉特征，从而产生视觉失真。针对上述问题，提出一种模型简化算法，该算法通过引入顶点曲度特征因子和限制狭长三角形的生成，保持了模型的几何特征；通过标记色差明显的三角形，很好地保持模型的纹理特征；通过衡量边折叠代价队列和边变化队列中的数据，解决误差累积在模型简化后影响视觉效果的问题，进而保证模型简化后的几何特征和纹理特征。实验表明，该算法高效、可靠、能很好保持模型的视觉特征。

关键词: 边折叠, 细节层次, 狭长三角形, 色差三角形, 纹理