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Sensors 2017, 17(4), 911; doi:10.3390/s17040911

Rapid Texture Optimization of Three-Dimensional Urban Model Based on Oblique Images

1
,
1,2,* , 1,* , 1,2
and
1
1
State Key Laboratory of Information Engineering in Surveying Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China
2
Collaborative Innovation Center for Geospatial Technology, Wuhan University, Wuhan 430079, China
*
Authors to whom correspondence should be addressed.
Received: 10 March 2017 / Revised: 12 April 2017 / Accepted: 14 April 2017 / Published: 20 April 2017
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Abstract

Seamless texture mapping is one of the key technologies for photorealistic 3D texture reconstruction. In this paper, a method of rapid texture optimization of 3D urban reconstruction based on oblique images is proposed aiming at the existence of texture fragments, seams, and inconsistency of color in urban 3D texture mapping based on low-altitude oblique images. First, we explore implementing radiation correction on the experimental images with a radiation procession algorithm. Then, an efficient occlusion detection algorithm based on OpenGL is proposed according to the mapping relation between the terrain triangular mesh surface and the images to implement the occlusion detection of the visible texture on the triangular facets as well as create a list of visible images. Finally, a texture clustering algorithm is put forward based on Markov Random Field utilizing the inherent attributes of the images and solve the energy function minimization by Graph-Cuts. The experimental results display that the method is capable of decreasing the existence of texture fragments, seams, and inconsistency of color in the 3D texture model reconstruction. View Full-Text
Keywords: oblique images; 3D texture reconstruction; radiation correction; occlusion detection; Graph-Cuts; texture mapping oblique images; 3D texture reconstruction; radiation correction; occlusion detection; Graph-Cuts; texture mapping
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Zhang, W.; Li, M.; Guo, B.; Li, D.; Guo, G. Rapid Texture Optimization of Three-Dimensional Urban Model Based on Oblique Images. Sensors 2017, 17, 911.

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