Abstract
Unsupervised Multi-View Stereo (MVS) methods have achieved promising progress recently. However, previous methods primarily depend on the photometric consistency assumption, which may suffer from two limitations: indistinguishable regions and view-dependent effects, e.g., low-textured areas and reflections. To address these issues, in this paper, we propose a new dual-level contrastive learning approach, named CL-MVSNet. Specifically, our model integrates two contrastive branches into an unsupervised MVS framework to construct additional supervisory signals. On the one hand, we present an image-level contrastive branch to guide the model to acquire more context awareness, thus leading to more complete depth estimation in indistinguishable regions. On the other hand, we exploit a scene-level contrastive branch to boost the representation ability, improving robustness to view-dependent effects. Moreover, to recover more accurate 3D geometry, we introduce an ℒ0.5 photometric consistency loss, which encourages the model to focus more on accurate points while mitigating the gradient penalty of undesirable ones. Extensive experiments on DTU and Tanks&Temples benchmarks demonstrate that our approach achieves state-of-the-art performance among all end-to-end unsupervised MVS frameworks and outperforms its supervised counterpart by a considerable margin without fine-tuning.
Original language | English |
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Title of host publication | 2023 IEEE/CVF International Conference on Computer Vision (ICCV) |
Publisher | IEEE |
Pages | 3746-3757 |
Number of pages | 12 |
ISBN (Electronic) | 9798350307184 |
ISBN (Print) | 9798350307191 |
DOIs | |
Publication status | Published - 15 Jan 2024 |
Event | 2023 IEEE/CVF International Conference on Computer Vision (ICCV) - Paris, France Duration: 1 Oct 2023 → 6 Oct 2023 https://iccv2023.thecvf.com/ |
Publication series
Name | International Conference on Computer Vision (ICCV) |
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Publisher | IEEE |
ISSN (Print) | 1550-5499 |
ISSN (Electronic) | 2380-7504 |
Conference
Conference | 2023 IEEE/CVF International Conference on Computer Vision (ICCV) |
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Abbreviated title | ICCV23 |
Country/Territory | France |
City | Paris |
Period | 1/10/23 → 6/10/23 |
Internet address |
Keywords
- Geometry
- Solid modeling
- Computer vision
- Three-dimensional displays
- Estimation
- Context awareness
- Benchmark testing