Cited by 3,270Advanced Vision and ImagingAdvanced Neural Network ApplicationsImage Processing Techniques and Applications

Unsupervised Monocular Depth Estimation with Left-Right Consistency

Godard, Clement, Aodha, Oisin Mac, Brostow, Gabriel J.·2017·2017 IEEE Conference on Computer Vision and Pattern Recognition (CVPR)

Abstract

Learning based methods have shown very promising results for the task of depth estimation in single images. However, most existing approaches treat depth prediction as a supervised regression problem and as a result, require vast quantities of corresponding ground truth depth data for training. Just recording quality depth data in a range of environments is a challenging problem. In this paper, we innovate beyond existing approaches, replacing the use of explicit depth data during training with easier-to-obtain binocular stereo footage. We propose a novel training objective that enables our convolutional neural network to learn to perform single image depth estimation, despite the absence of ground truth depth data. Ex-ploiting epipolar geometry constraints, we generate disparity images by training our network with an image reconstruction loss. We show that solving for image reconstruction alone results in poor quality depth images. To overcome this problem, we propose a novel training loss that enforces consistency between the disparities produced relative to both the left and right images, leading to improved performance and robustness compared to existing approaches. Our method produces state of the art results for monocular depth estimation on the KITTI driving dataset, even outperforming supervised methods that have been trained with ground truth depth.

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Crossref · 10.1109/cvpr.2017.699

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  • Monocular visual odometry recovers translation only up to an unknown scale because depth is unobservable from a monocular camera.

    “Monocular VO approaches recover translation up to an unknown scale [13], [14], [15], [16] as depth is unobservable from monocular cameras and thus there is ambiguity in the scale of translational estimates.”

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Authors
Godard, C., Aodha, O. M., & Brostow, G. J.
Affiliations
University College London (GB)
Venue
2017 IEEE Conference on Computer Vision and Pattern Recognition (CVPR)
Publisher
IEEE
Published
2017-07
Pages
6602-6611
ISSN
1063-6919 (ISSN-L)
OpenAlex
W2520707372
Cited by
3,270
References
61
Citations by year
2026: 139 · 2025: 283 · 2024: 374 · 2023: 416 · 2022: 407 · 2021: 521 · 2020: 468 · 2019: 429 · 2018: 208 · 2017: 25
FWCI
90.42
Type
conference paper
Language
en
Open access
closed
Locations
IEEE Computer Society Conference on Computer Vision and Pattern Recognition/Proceedings - IEEE Computer Society Conference on Computer Vision and Pattern Recognition/Proceedings (publishedVersion)
Funders
Engineering and Physical Sciences Research Council (EP/K023578/1, EP/K015664/1)
Topics
  • Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Advanced Vision and Imaging
  • Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Advanced Neural Network Applications
  • Physical Sciences › Engineering › Media Technology › Image Processing Techniques and Applications
Keywords
monocular depth estimation, unsupervised learning, left-right consistency, stereo disparity, epipolar geometry

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