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We present a novel method for single image depth estimation using surface normal constraints. Existing depth estimation methods either suffer from the lack of geometric constraints, or are limited to the difficulty of reliably capturing…

Computer Vision and Pattern Recognition · Computer Science 2021-07-13 Xiaoxiao Long , Cheng Lin , Lingjie Liu , Wei Li , Christian Theobalt , Ruigang Yang , Wenping Wang

Colorectal cancer is the fourth leading cause of cancer deaths worldwide and the second leading cause in the United States. The risk of colorectal cancer can be mitigated by the identification and removal of premalignant lesions through…

Computer Vision and Pattern Recognition · Computer Science 2017-11-29 Faisal Mahmood , Nicholas J. Durr

Monocular 3D object detection reveals an economical but challenging task in autonomous driving. Recently center-based monocular methods have developed rapidly with a great trade-off between speed and accuracy, where they usually depend on…

Computer Vision and Pattern Recognition · Computer Science 2023-02-22 Zizhang Wu , Yuanzhu Gan , Lei Wang , Guilian Chen , Jian Pu

Although recent 3D-native generators have made great progress in synthesizing reliable geometry, they still fall short in achieving realistic appearances. A key obstacle lies in the lack of diverse and high-quality real-world 3D assets with…

Computer Vision and Pattern Recognition · Computer Science 2026-03-09 Xinyue Liang , Zhinyuan Ma , Lingchen Sun , Yanjun Guo , Lei Zhang

We address the challenges in estimating 3D human poses from multiple views under occlusion and with limited overlapping views. We approach multi-view, single-person 3D human pose reconstruction as a regression problem and propose a novel…

Computer Vision and Pattern Recognition · Computer Science 2023-12-29 Olivier Moliner , Sangxia Huang , Kalle Åström

Recovering the metric 3D shape from a single image is particularly relevant for robotics and embodied intelligence applications, where accurate spatial understanding is crucial for navigation and interaction with environments. Usually, the…

Computer Vision and Pattern Recognition · Computer Science 2025-02-14 Chenghao Zhang , Lubin Fan , Shen Cao , Bojian Wu , Jieping Ye

In recent years, 3D visual foundation models pioneered by pointmap-based approaches such as DUSt3R have attracted a lot of interest, achieving impressive accuracy and strong generalization across diverse scenes. However, these methods are…

Computer Vision and Pattern Recognition · Computer Science 2026-03-17 Shuang Guo , Filbert Febryanto , Lei Sun , Guillermo Gallego

The rise of chronic diseases related to diet, such as obesity and diabetes, emphasizes the need for accurate monitoring of food intake. While AI-driven dietary assessment has made strides in recent years, the ill-posed nature of recovering…

Computer Vision and Pattern Recognition · Computer Science 2026-01-29 Gautham Vinod , Bruce Coburn , Siddeshwar Raghavan , Jiangpeng He , Fengqing Zhu

Recovering the scene depth from a single image is an ill-posed problem that requires additional priors, often referred to as monocular depth cues, to disambiguate different 3D interpretations. In recent works, those priors have been learned…

Computer Vision and Pattern Recognition · Computer Science 2020-08-18 Lam Huynh , Phong Nguyen-Ha , Jiri Matas , Esa Rahtu , Janne Heikkila

Purpose: Visual 3D scene reconstruction can support colonoscopy navigation. It can help in recognising which portions of the colon have been visualised and characterising the size and shape of polyps. This is still a very challenging…

Computer Vision and Pattern Recognition · Computer Science 2025-02-19 Rema Daher , Francisco Vasconcelos , Danail Stoyanov

Video depth estimation extends monocular prediction into the temporal domain to ensure coherence. However, existing methods often suffer from spatial blurring in fine-detail regions and temporal inconsistencies. We argue that current…

Computer Vision and Pattern Recognition · Computer Science 2026-05-20 Yuecheng Liu , Junda Cheng , Longliang Liu , Wenjing Liao , Hanrui Cheng , Yuzhou Wang , Xin Yang

We present a new learning-based method for multi-frame depth estimation from a color video, which is a fundamental problem in scene understanding, robot navigation or handheld 3D reconstruction. While recent learning-based methods estimate…

Computer Vision and Pattern Recognition · Computer Science 2021-07-13 Xiaoxiao Long , Lingjie Liu , Christian Theobalt , Wenping Wang

High screening coverage during colonoscopy is crucial to effectively prevent colon cancer. Previous work has allowed alerting the doctor to unsurveyed regions by reconstructing the 3D colonoscopic surface from colonoscopy videos in…

Computer Vision and Pattern Recognition · Computer Science 2021-03-19 Yubo Zhang , Shuxian Wang , Ruibin Ma , Sarah K. McGill , Julian G. Rosenman , Stephen M. Pizer

We introduce MapAnything, a unified transformer-based feed-forward model that ingests one or more images along with optional geometric inputs such as camera intrinsics, poses, depth, or partial reconstructions, and then directly regresses…

We present NOVA3R, an effective approach for non-pixel-aligned 3D reconstruction from a set of unposed images in a feed-forward manner. Unlike pixel-aligned methods that tie geometry to per-ray predictions, our formulation learns a global,…

Computer Vision and Pattern Recognition · Computer Science 2026-03-06 Weirong Chen , Chuanxia Zheng , Ganlin Zhang , Andrea Vedaldi , Daniel Cremers

Articulation-centric 2D/3D pose supervision forms the core training objective in most existing 3D human pose estimation techniques. Except for synthetic source environments, acquiring such rich supervision for each real target domain at…

Computer Vision and Pattern Recognition · Computer Science 2022-04-05 Mugalodi Rakesh , Jogendra Nath Kundu , Varun Jampani , R. Venkatesh Babu

Monocular depth estimation (MDE) is a critical task to guide autonomous medical robots. However, obtaining absolute (metric) depth from an endoscopy camera in surgical scenes is difficult, which limits supervised learning of depth on real…

Computer Vision and Pattern Recognition · Computer Science 2025-11-05 Hao Li , Daiwei Lu , Jesse d'Almeida , Dilara Isik , Ehsan Khodapanah Aghdam , Nick DiSanto , Ayberk Acar , Susheela Sharma , Jie Ying Wu , Robert J. Webster , Ipek Oguz

Monocular depth estimation is vital for scene understanding and downstream tasks. We focus on the supervised setup, in which ground-truth depth is available only at training time. Based on knowledge about the high regularity of real 3D…

Computer Vision and Pattern Recognition · Computer Science 2022-04-06 Vaishakh Patil , Christos Sakaridis , Alexander Liniger , Luc Van Gool

Recently, learning-based robotic navigation systems have gained extensive research attention and made significant progress. However, the diversity of open-world scenarios poses a major challenge for the generalization of such systems to…

Robotics · Computer Science 2025-04-17 Xingwu Ji , Haochen Niu , Dexin Duan , Rendong Ying , Fei Wen , Peilin Liu

Leveraging the rich semantic features of vision-language models (VLMs) like CLIP for monocular depth estimation tasks is a promising direction, yet often requires extensive fine-tuning or lacks geometric precision. We present a…

Computer Vision and Pattern Recognition · Computer Science 2026-04-02 Reyhaneh Ahani Manghotay , Jie Liang