针对经典约束纹理映射算法在保持纹理有效性的同时算法复杂度高的问题,提出了根据评估值自适应选取目标函数的约束纹理映射方法.结合模型的参数化平面,计算模型特征点三角化后每一个三角块内部所有顶点的评估值,根据与给定阈值比较后的结果自适应选择目标函数.对于不能直接应用两种目标函数的三角块进行迭代三角化并计算下一级三角块的评估值.针对局部特征点映射不精确的问题采取局部邻域调整方法,只需调整一阶或者二阶领域的顶点位置即可.实验表明本文算法相较于经典算法时间复杂度平均提高75%以上.将本文算法映射后的模型加载到高帧频实时渲染系统中,实验表明本文算法具有很好的鲁棒性,重复实验表明本文算法可以保持纹理的有效性.
参考文献
[1] | Bruno L,Jean L M.Non distorted texture mapping for sheared triangulated meshes[J].Proc.of Sgigarph98,1998,6(3):343-352.,1998. |
[2] | Bruno L.Constrained texture mapping for polygonal meshes[J].Engineering with Computers,2001,11 (5):679-689.,2001. |
[3] | Sheffer A,de Sturler E.Parameterization of faceted surfaces for meshing using angle based flattening[J].Engineering with Computers,2001,17(1):326-337.,2001. |
[4] | Alia S T,de Eric T.Smoothing an overlay grid to minimize linear distortion in texture mapping[J].ACM Transactions on Graphics,2002,21(4):874-890.,2002. |
[5] | Kraevoy V,Sheffer A,Gotsman C.Matchmaker:constructing constrained texture maps[J].ACM Trans.Graphics,2003,22(3):326-333.,2003. |
[6] | Guo Y W,Pan Y J,Cui X F,et al.Harmonic maps based constrained texture mapping method【Jl.Journal of Computer Aided Design & Computer Graphics,2005,7(17):1358-1370.,2005. |
[7] | Lee T Y,Yen S W,Yeh I C.Texture mapping with hard constraints using warping scheme[J].Transactions on Visualization and Computer Graphics,2008,14(2):382-395.,2008. |
[8] | Se'bastien H,Anatole L,Tony R,et al.Design and application of real time visual attention model for the exploration of 3D virtual environments[J].Transactions on Visualization and Computer Graphics,2012,18(3):356-368.,2012. |
[9] | Yu H C,Lee T Y,Cheng Y,et al.RBF-based reparameterization method for constrained texture mapping[J].Transactions on Journal Name,2012,8(2):785-796.,2012. |
[10] | 丁南南,刘艳滢,朱明.尺度相互作用墨西哥帽小波提取图像特征点[J].液晶与显示,2012(01):125-129. |
[11] | 吴一全,孟天亮,王凯.基于斜分倒数交叉熵和蜂群优化的火焰图像阈值选取[J].光学精密工程,2014(01):235-243. |
[12] | 杨利红,赵变红,张星祥,任建岳.点扩散函数高斯拟合估计与遥感图像恢复[J].中国光学,2012(02):181-188. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%