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A multiscale-contour-based interpolation framework for generating a time-varying quasi-dense point cloud sequence 被引量:1
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作者 Chu-hua HUANG Dong-ming LU chang-yu diao 《Frontiers of Information Technology & Electronic Engineering》 SCIE EI CSCD 2016年第5期422-434,共13页
To speed up the reconstruction of 3D dynamic scenes in an ordinary hardware platform, we propose an efficient framework to reconstruct 3D dynamic objects using a multiscale-contour-based interpolation from multi-view ... To speed up the reconstruction of 3D dynamic scenes in an ordinary hardware platform, we propose an efficient framework to reconstruct 3D dynamic objects using a multiscale-contour-based interpolation from multi-view videos. Our framework takes full advantage of spatio-temporal-contour consistency. It exploits the property to interpolate single contours, two neighboring contours which belong to the same model, and two contours which belong to the same view at different times, corresponding to point-, contour-, and model-level interpolations, respectively. The framework formulates the interpolation of two models as point cloud transport rather than non-rigid surface deformation. Our framework speeds up the reconstruction of a dynamic scene while improving the accuracy of point-pairing which is used to perform the interpolation. We obtain a higher frame rate, spatio-temporal-coherence, and a quasi-dense point cloud sequence with color information. Experiments with real data were conducted to test the efficiency of the framework. 展开更多
关键词 Multi-view video Free-viewpoint video Point-pair Multiscale-contour-based interpolation Spatio-temporal-contour Consistency Time-varying point cloud sequence
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A non-Lambertian photometric stereo under perspective projection 被引量:1
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作者 Min LI chang-yu diao +2 位作者 Duan-qing XU Wei XING Dong-ming LU 《Frontiers of Information Technology & Electronic Engineering》 SCIE EI CSCD 2020年第8期1191-1205,共15页
Under the perspective projection assumption,non-Lambertian photometric stereo is a highly non-linear problem.In this study,we present an optimized framework for reconstructing the surface normal and depth with non-Lam... Under the perspective projection assumption,non-Lambertian photometric stereo is a highly non-linear problem.In this study,we present an optimized framework for reconstructing the surface normal and depth with non-Lambertian reflection models under perspective projection.By decomposing the images into diffuse and specular components,we compute the surface normal and reflectance simultaneously.We also propose a variational formulation that is robust and useful for surface reconstruction.The experiments show that our method accurately reconstructs both the surface shape and reflectance of colorful objects with non-Lambertian surfaces. 展开更多
关键词 Photometric stereo Three-dimensional reconstruction Perspective projection Image decomposition
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A low-overhead asynchronous consensus framework for distributed bundle adjustment
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作者 Zhuo-hao LIU chang-yu diao +1 位作者 Wei XING Dong-ming LU 《Frontiers of Information Technology & Electronic Engineering》 SCIE EI CSCD 2020年第10期1442-1454,共13页
Generally,the distributed bundle adjustment(DBA)method uses multiple worker nodes to solve the bundle adjustment problems and overcomes the computation and memory storage limitations of a single computer.However,the p... Generally,the distributed bundle adjustment(DBA)method uses multiple worker nodes to solve the bundle adjustment problems and overcomes the computation and memory storage limitations of a single computer.However,the performance considerably degrades owing to the overhead introduced by the additional block partitioning step and synchronous waiting.Therefore,we propose a low-overhead consensus framework.A partial barrier based asynchronous method is proposed to early achieve consensus with respect to the faster worker nodes to avoid waiting for the slower ones.A scene summarization procedure is designed and integrated into the block partitioning step to ensure that clustering can be performed on the small summarized scene.Experiments conducted on public datasets show that our method can improve the worker node utilization rate and reduce the block partitioning time.Also,sample applications are demonstrated using our large-scale culture heritage datasets. 展开更多
关键词 STRUCTURE-FROM-MOTION Distributed bundle adjustment OVERHEAD Asynchronous consensus Partial barrier Bipartite graph summarization
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