中文摘要：

在考虑不严重影响画面视觉效果的前期下,提出了保持视觉特征的LoD模型简化算法,该方法能较好地解决复杂地形场景模型引起的绘制视觉失真问题。在保持视觉特征的前提下,引入顶点的曲度特征因子,通过限制狭长三角形的生成和标记色差明显的三角形,很好地保证了模型的几何和纹理特征。通过计算折叠代价的方法减少模型误差累积,有效地解决了影响视觉效果的问题。实验结果表明,在保证视觉特征的前提下,利用半边折叠算法简化模型,实现三维场景的地形绘制。

英文摘要：

At present,there are a lot of problems with model simplification algorithms when rendering 3D geometric and terrain models testing the relationship between quality and the display effect.In order to maintain visual characteristics of the model,a reasonable implementation model for simplification is put forward.This model simplification algorithm solves the reflection of the LoD simplified model by introducing a vertex curvature characteristic factor,limiting narrow triangle formation and signing triangles whose color changed quite differently.Experimental results show that：the algorithm is efficient when guaranteeing the visual features of the simplified model,andcan be used to the terrain rendering of 3D scene.