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BRoPH: An efficient and compact binary descriptor for 3D point clouds
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DOI：10.1016/j.patcog.2017.11.029.png)
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3D feature descriptor plays an essential role in 3D computer vision as it is a pre-requisite step for many 3D vision applications. Despite there exists many 3D feature descriptors currently, they are mostly represented in floating representation, resulting costly computation and storage. In this paper, we propose a 3D binary local feature descriptor, Binary Rotational Projection Histogram (BRoPH), aimed at compactness of representation and efficiency of computation. BRoPH is generated directly from point cloud by turning the description of 3D point cloud into a series binarization of 2D image patches. The exploited local reference frame promotes the construction efficiency meanwhile maintains repeatability and stability, the multi view mechanism and integration of density distribution and depth information employed in BRoPH complement each other and enhance its descriptiveness, and the multi-scale extension of Center-Symmetric Local Binary Patterns (CS-LBP) provides an efficient and compact way to generate binary string. We compare BRoPH against several representative descriptors on public datasets and demonstrate that it achieves about 14 times more compact, 28 and 4 times more faster in terms of describing and matching time respectively, than the average performance of the compared floating descriptors. (C) 2017 Published by Elsevier Ltd.
Keyword:
Local reference frame
Binary feature descriptor
Object recognition
Multi-view&multi-scale
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7.6
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