Frequency-Selective Geometry Upsampling of Point Clouds

The demand for high-resolution point clouds has increased throughout the last years. However, capturing high-resolution point clouds is expensive and thus, frequently replaced by upsampling of low-resolution data. Most state-of-the-art methods are either restricted to a rastered grid, incorporate no...

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Bibliographic Details
Main Authors: Heimann, Viktoria, Spruck, Andreas, Kaup, Andre
Format: Conference Proceeding
Language:English
Subjects:
3D point cloud
Discrete cosine transforms
Frequency estimation
frequency selectivity
Geometry
geometry upsampling
Image color analysis
Point cloud compression
Three-dimensional displays
Visualization
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Summary:The demand for high-resolution point clouds has increased throughout the last years. However, capturing high-resolution point clouds is expensive and thus, frequently replaced by upsampling of low-resolution data. Most state-of-the-art methods are either restricted to a rastered grid, incorporate normal vectors, or are trained for a single use case. We propose to use the frequency selectivity principle, where a frequency model is estimated locally that approximates the surface of the point cloud. Then, additional points are inserted into the approximated surface. Our novel frequency-selective geometry upsampling shows superior results in terms of subjective as well as objective quality compared to state-of-the-art methods for scaling factors of 2 and 4. On average, our proposed method shows a 4.4 times smaller point-to-point error than the second best state-of-the-art PU-Net for a scale factor of 4.
ISSN:2381-8549
DOI:10.1109/ICIP46576.2022.9897920