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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2507.19546 |
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| _version_ | 1866913960249262080 |
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| author | Du, Yansong Deng, Yutong Zhou, Yuting Jiao, Feiyu Wang, Bangyao Xu, Zhancong Jiang, Zhaoxiang Guan, Xun |
| author_facet | Du, Yansong Deng, Yutong Zhou, Yuting Jiao, Feiyu Wang, Bangyao Xu, Zhancong Jiang, Zhaoxiang Guan, Xun |
| contents | We propose a novel compressed sensing method to improve the depth reconstruction accuracy and multi-target separation capability of indirect Time-of-Flight (iToF) systems. Unlike traditional approaches that rely on hardware modifications, complex modulation, or cumbersome data-driven reconstruction, our method operates with a single modulation frequency and constructs the sensing matrix using multiple phase shifts and narrow-duty-cycle continuous waves. During matrix construction, we further account for pixel-wise range variation caused by lens distortion, making the sensing matrix better aligned with actual modulation response characteristics. To enhance sparse recovery, we apply K-Means clustering to the distance response dictionary and constrain atom selection within each cluster during the OMP process, which effectively reduces the search space and improves solution stability. Experimental results demonstrate that the proposed method outperforms traditional approaches in both reconstruction accuracy and robustness, without requiring any additional hardware changes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_19546 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Multipath Interference Suppression in Indirect Time-of-Flight Imaging via a Novel Compressed Sensing Framework Du, Yansong Deng, Yutong Zhou, Yuting Jiao, Feiyu Wang, Bangyao Xu, Zhancong Jiang, Zhaoxiang Guan, Xun Signal Processing Computer Vision and Pattern Recognition We propose a novel compressed sensing method to improve the depth reconstruction accuracy and multi-target separation capability of indirect Time-of-Flight (iToF) systems. Unlike traditional approaches that rely on hardware modifications, complex modulation, or cumbersome data-driven reconstruction, our method operates with a single modulation frequency and constructs the sensing matrix using multiple phase shifts and narrow-duty-cycle continuous waves. During matrix construction, we further account for pixel-wise range variation caused by lens distortion, making the sensing matrix better aligned with actual modulation response characteristics. To enhance sparse recovery, we apply K-Means clustering to the distance response dictionary and constrain atom selection within each cluster during the OMP process, which effectively reduces the search space and improves solution stability. Experimental results demonstrate that the proposed method outperforms traditional approaches in both reconstruction accuracy and robustness, without requiring any additional hardware changes. |
| title | Multipath Interference Suppression in Indirect Time-of-Flight Imaging via a Novel Compressed Sensing Framework |
| topic | Signal Processing Computer Vision and Pattern Recognition |
| url | https://arxiv.org/abs/2507.19546 |