一种基于GPU并行计算的无人机影像快速镶嵌方法
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摘要
提出了一种从匀光后无人机影像出发,以Voronoi图为镶嵌线网络,基于GPU并行计算的无人机影像快速镶嵌方法。首先,通过Wallis滤波处理影像间色彩不一致问题;然后,以测区影像位置自动生成Voronoi图镶嵌线网络;最后,基于GPU并行计算将无人机影像快速正射纠正并镶嵌。通过对230张空间分辨率为0.1 m的无人机影像进行快速纠正镶嵌,实验结果表明,该方法较传统方法效率有很大提升。
A method for rapid mosaicking UAV images is introduced,which is based on Voronoi network and GPU parallel computing. Firstly,the radiometric difference between the images is solved by Wallis dodging. Then the seamline network based on Voronoi diagram is created by the locations of all UAV images. At last,the UAV images are ortho-rectified and mosaicked rapidly based on the GPU parallel computing. Experimental results indicate that the method's efficiency has increased by several times compared with the traditional methods by mosaicking 230 UAV images whose resolution is 0. 1 meter. The mere rectification of the valid area of every UAV image and the application of GPU parallel computing not only avoid the huge data redundancy but also greatly reduces the computation time.
A method for rapid mosaicking UAV images is introduced,which is based on Voronoi network and GPU parallel computing. Firstly,the radiometric difference between the images is solved by Wallis dodging. Then the seamline network based on Voronoi diagram is created by the locations of all UAV images. At last,the UAV images are ortho-rectified and mosaicked rapidly based on the GPU parallel computing. Experimental results indicate that the method's efficiency has increased by several times compared with the traditional methods by mosaicking 230 UAV images whose resolution is 0. 1 meter. The mere rectification of the valid area of every UAV image and the application of GPU parallel computing not only avoid the huge data redundancy but also greatly reduces the computation time.
引文
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[9]李朋龙,邓非,何江,等.GPU-CPU协同航空影像快速正射纠正方法[J].测绘地理信息,2016,41(2):44-47.Li P L,Deng F,He J,et al.GPU-CPU cooperate processing of aerial image rapid ortho-rectification[J].Journal of Geomatics,2016,41(2):44-47.
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[11]方留杨,王密,李德仁.CPU和GPU协同处理的光学卫星遥感影像正射校正方法[J].测绘学报,2013,42(5):668-675.Fang L Y,Wang M,Li D R.A CPU-GPU co-processing orthographic rectification approach for optical satellite imagery[J].Acta Geodaetica et Cartographica Sinica,2013,42(5):668-675.
[12]韩宇韬.数字正射影像镶嵌中色彩一致性处理的若干问题研究[D].武汉:武汉大学,2014.Han Y T.Research on Key Technology of Color Consistency Processing for Digtial Ortho Map Mosaicing[D].Wuhan:Wuhan University,2014.
[13]李德仁,王密,潘俊.光学遥感影像的自动匀光处理及应用[J].武汉大学学报(信息科学版),2006,31(9):753-756.Li D R,Wang M,Pan J.Auto-dodging processing and its application for optical RS images[J].Geomatics and Information Science of Wuhan University,2006,31(9):753-756.
[14]于涵,李朋龙,胡冯伟.基于Voronoi图无人机影像快速拼接方法研究[J].地理空间信息,2016,14(4):27-29.Yu H,Li P L,Hu F W.UAV images rapid mosaic method based on Voronoi diagram[J].Geospatial Information,2016,14(4):27-29.
[2]Kerschner M.Seamline detection in colour orthoimage mosaicking by use of twin snakes[J].ISPRS Journal of Photogrammetry and Remote Sensing,2001,56(1):53-64.
[3]Davis J.Mosaics of scenes with moving objects[C]//Processing of1998 IEEE Computer Society Conference on Computer Vision and Pattern Recognition.Santa Barbara,CA,USA:IEEE,1998.
[4]Chon J,Kim H,Lin C S.Seam-line determination for image mosaicking:A technique minimizing the maximum local mismatch and the global cost[J].ISPRS Journal of Photogrammetry and Remote Sensing,2010,65(1):86-92.
[5]袁修孝,钟灿.一种改进的正射影像镶嵌线最小化最大搜索算法[J].测绘学报,2012,41(2):199-204.Yuan X X,Zhong C.An improvement of minimize local maximum algorithm on searching seam line for orthoimage mosaicking[J].Acta Geodaetica et Cartographica Sinica,2012,41(2):199-204.
[6]潘俊,王密,李德仁.基于顾及重叠的面Voronoi图的接缝线网络生成方法[J].武汉大学学报(信息科学版),2009,34(5):518-521.Pan J,Wang M,Li D R.Generation of seamline network using area Voronoi diagram with overlap[J].Geomatics and Information Science of Wuhan University,2009,34(5):518-521.
[7]李烁,王慧,程挺,等.顾及有效区域的Voronoi图的正射影像拼接[J].测绘科学技术学报,2014,31(5):519-523.Li S,Wang H,Cheng T,et al.Orthoimage mosaicking based on Voronoi diagram with valid area[J].Journal of Geomatics Science and Technology,2014,31(5):519-523.
[8]侯毅,沈彦男,王睿索,等.基于GPU的数字影像的正射纠正技术的研究[J].现代测绘,2009,32(3):10-11.Hou Y,Shen Y N,Wang R S,et al.The discussion of GPU-based digital differential rectification[J].Modern Surveying and Mapping,2009,32(3):10-11.
[9]李朋龙,邓非,何江,等.GPU-CPU协同航空影像快速正射纠正方法[J].测绘地理信息,2016,41(2):44-47.Li P L,Deng F,He J,et al.GPU-CPU cooperate processing of aerial image rapid ortho-rectification[J].Journal of Geomatics,2016,41(2):44-47.
[10]杨靖宇,张永生,李正国,等.遥感影像正射纠正的GPU-CPU协同处理研究[J].武汉大学学报(信息科学版),2011,36(9):1043-1046.Yang J Y,Zhang Y S,Li Z G,et al.GPU-CPU cooperate processing of RS image ortho-rectification[J].Geomatics and Information Science of Wuhan University,2011,36(9):1043-1046.
[11]方留杨,王密,李德仁.CPU和GPU协同处理的光学卫星遥感影像正射校正方法[J].测绘学报,2013,42(5):668-675.Fang L Y,Wang M,Li D R.A CPU-GPU co-processing orthographic rectification approach for optical satellite imagery[J].Acta Geodaetica et Cartographica Sinica,2013,42(5):668-675.
[12]韩宇韬.数字正射影像镶嵌中色彩一致性处理的若干问题研究[D].武汉:武汉大学,2014.Han Y T.Research on Key Technology of Color Consistency Processing for Digtial Ortho Map Mosaicing[D].Wuhan:Wuhan University,2014.
[13]李德仁,王密,潘俊.光学遥感影像的自动匀光处理及应用[J].武汉大学学报(信息科学版),2006,31(9):753-756.Li D R,Wang M,Pan J.Auto-dodging processing and its application for optical RS images[J].Geomatics and Information Science of Wuhan University,2006,31(9):753-756.
[14]于涵,李朋龙,胡冯伟.基于Voronoi图无人机影像快速拼接方法研究[J].地理空间信息,2016,14(4):27-29.Yu H,Li P L,Hu F W.UAV images rapid mosaic method based on Voronoi diagram[J].Geospatial Information,2016,14(4):27-29.