Geometric Back-Projection Network for Point Cloud Classification

As the basic task of point cloud analysis, classification is fundamental but always challenging. To address some unsolved problems of existing methods, we propose a network that captures geometric features of point clouds for better representations. To achieve this, on the one hand, we enrich the ge...

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Vydáno v:IEEE transactions on multimedia Ročník 24; s. 1943 - 1955
Hlavní autoři: Qiu, Shi, Anwar, Saeed, Barnes, Nick
Médium: Journal Article
Jazyk:angličtina
Vydáno: Piscataway IEEE 2022
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Témata:
3D Deep Learning
Attention Mechanism
Classification
Error correction
Error-correcting Feedback
Feature extraction
Feature maps
Geometric Features
Geometry
Microbalances
Point Cloud Classification
Redundancy
Shape
Task analysis
Three-dimensional displays
Visualization
ISSN:1520-9210, 1941-0077
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Popis
Shrnutí:As the basic task of point cloud analysis, classification is fundamental but always challenging. To address some unsolved problems of existing methods, we propose a network that captures geometric features of point clouds for better representations. To achieve this, on the one hand, we enrich the geometric information of points in low-level 3D space explicitly. On the other hand, we apply CNN-based structures in high-level feature spaces to learn local geometric context implicitly. Specifically, we leverage an idea of error-correcting feedback structure to capture the local features of point clouds comprehensively. Furthermore, an attention module based on channel affinity assists the feature map to avoid possible redundancy by emphasizing its distinct channels. The performance on both synthetic and real-world point clouds datasets demonstrate the superiority and applicability of our network. Comparing with other state-of-the-art methods, our approach balances accuracy and efficiency.
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ISSN:1520-9210
1941-0077
DOI:10.1109/TMM.2021.3074240