基于误差控制的多分辨率纹理无缝映射
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摘要
针对大规模地形纹理映射时存在的裂缝问题,通过埃尔米特插值法对视点运动进行判断,将角度与距离加权计算,生成多参数纹理像素信息;进行视锥裁剪时,结合根据视点位置与视线方向构造的基于地形块的包围球;由多分辨率级别、包围球半径计算纹理误差,保证地形纹理无缝绘制。以上即本文提出的一种基于误差控制的多分辨纹理无缝映射的方法。实验结果表明,该方法在保证帧速率变化不大的情况下,纹理误差计算更精确,更好地保证了地形纹理的衔接性,避免了纹理块拼接产生的裂缝。
Aiming at the crack problem of large scale terrain texture mapping,the viewpoint motion was judged using Hermite interpolation method,and weight of angles and distances were calculated to generate multi-parameter texture pixel information.When the frustum was cropped,the bounding sphere based on the terrain block was combined with the position of the viewpoint and the direction of sight.The texture error was calculated using the multi-resolution level and bounding sphere radius.The above was a method of multi-resolution texture mapping based on error control.Experimental results show that the frame rates are high,texture error calculation is more accurate.It can ensure the consistency of the terrain texture,and avoid the crack texture splicing producing.
Aiming at the crack problem of large scale terrain texture mapping,the viewpoint motion was judged using Hermite interpolation method,and weight of angles and distances were calculated to generate multi-parameter texture pixel information.When the frustum was cropped,the bounding sphere based on the terrain block was combined with the position of the viewpoint and the direction of sight.The texture error was calculated using the multi-resolution level and bounding sphere radius.The above was a method of multi-resolution texture mapping based on error control.Experimental results show that the frame rates are high,texture error calculation is more accurate.It can ensure the consistency of the terrain texture,and avoid the crack texture splicing producing.
引文
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[2]Kersten TP,Stallmann D.Automatic texture mapping of architectural and archaeological 3Dmodels[C]//ISPRS-International Archives of the Photogrammetry,Remote Sensing and Spatial Information Sciences,2012:273-278.
[3]YANG Zaixing.Three-dimension visualization of watershed based on multi-resolution LOD[D].Xi’an:Xi’an University of Science and Technology,2012(in Chinese).[杨在兴.基于多分辨率LOD的流域三维可视化研究[D].西安:西安科技大学,2012.]
[4]JIANG Hanqing,WANG Bosheng,ZHANG Guofeng,et al.High-quality texture mapping for complex 3Dscenes[J].Chinese Journal of Computers,2015,38(12):2349-2360(in Chinese).[姜翰青,王博胜,章国锋,等.面向复杂三维场景的高质量纹理映射[J].计算机学报,2015,38(12):2349-2360.]
[5]XING Yue.Real-time dynamic terrain rendering based on GPU[D].Beijing:North China Electric Power University,2016(in Chinese).[邢玥.基于GPU的动态地形实时绘制[D].北京:华北电力大学,2016.]
[6]WAN Yan, WANG Huijie,LU Jun.On texture mapping based on triangular mesh model[J].Computer Applications and Software,2016,33(4):160-163(in Chinese).[万燕,王慧洁,鲁俊.基于三角网格模型的纹理映射研究[J].计算机应用与软件,2016,33(4):160-163.]
[7]XIAO Guanghua.Massive terrain real-time rendering technology research based on the quad-tree[D].Nanchang:Jiangxi Normal University,2012(in Chinese).[肖光华.基于四叉树的海量地形实时绘制技术研究[D].南昌:江西师范大学,2012.]
[8]Bondarev E,Heredia F,Favier R,et al.On photo-realistic3Dreconstruction of large-scale and arbitrary-shaped environments[C]//Consumer Communications and Networking Conference.IEEE,2013:621-624.
[9]LIU Bin,CHEN Xiangning,XUE Junshi.Seamless texture mapping algorithm based on multi parameter weighted[J].Journal of Image and Graphics,2015,20(7):929-936(in Chinese).[刘彬,陈向宁,薛俊诗.多参数加权的无缝纹理映射算法[J].中国图象图形学报,2015,20(7):929-936.]
[10]Quadling M,Tchouprakov A,Severance G,et al.Lighting compensated dynamic texture mapping of 3D models[P].US:US 8532355B2,2013.
[11]Chen Z,Zhou J,Chen Y,et al.3D texture mapping in multi-view reconstruction[G].LNCS 7431:International Symposium on Visual Computing.Berlin:Springer-Verlag Berlin Heidelberg,2012:359-371.
[12]Alexiadis DS,Zarpalas D,Daras P.Real-time,realistic fullbody 3Dreconstruction and texture mapping from multiple Kinects[C]//Ivmsp Workshop.IEEE,2013:1-4.