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The ability to extend the field of view of laparoscopy images can help the surgeons to obtain a better understanding of the anatomical context. However, due to tissue deformation, complex camera motion and significant three-dimensional (3D)…

Computer Vision and Pattern Recognition · Computer Science 2021-03-15 Haoyin Zhou , Jagadeesan Jayender

Accurate 3D scene reconstruction is essential for numerous medical tasks. Given the challenges in obtaining ground truth data, there has been an increasing focus on self-supervised learning (SSL) for endoscopic depth estimation as a basis…

Computer Vision and Pattern Recognition · Computer Science 2025-03-21 Beilei Cui , Long Bai , Mobarakol Islam , An Wang , Zhiqi Ma , Yiming Huang , Feng Li , Zhen Chen , Zhongliang Jiang , Nassir Navab , Hongliang Ren

The SCARED dataset is a widely used benchmark for endoscopic depth estimation, offering ground-truth 3D reconstructions captured with a structured light sensor. However, the depth maps for non-keyframe images rely on robot kinematics that…

Computer Vision and Pattern Recognition · Computer Science 2026-05-19 John J. Han , Adam Schmidt , Max Allan , Jie Ying Wu , Omid Mohareri

This letter introduces a novel framework for dense Visual Simultaneous Localization and Mapping (VSLAM) based on Gaussian Splatting. Recently, SLAM based on Gaussian Splatting has shown promising results. However, in monocular scenarios,…

Computer Vision and Pattern Recognition · Computer Science 2024-09-11 Pengcheng Zhu , Yaoming Zhuang , Baoquan Chen , Li Li , Chengdong Wu , Zhanlin Liu

Initial applications of 3D Gaussian Splatting (3DGS) in Visual Simultaneous Localization and Mapping (VSLAM) demonstrate the generation of high-quality volumetric reconstructions from monocular video streams. However, despite these…

Robotics · Computer Science 2024-10-23 Yan Song Hu , Dayou Mao , Yuhao Chen , John Zelek

As the significance of simulation in medical care and intervention continues to grow, it is anticipated that a simplified and low-cost platform can be set up to execute personalized diagnoses and treatments. 3D Slicer can not only perform…

Computer Vision and Pattern Recognition · Computer Science 2024-06-21 Ruijie Tang , Beilei Cui , Hongliang Ren

We present PHORHUM, a novel, end-to-end trainable, deep neural network methodology for photorealistic 3D human reconstruction given just a monocular RGB image. Our pixel-aligned method estimates detailed 3D geometry and, for the first time,…

Computer Vision and Pattern Recognition · Computer Science 2022-04-20 Thiemo Alldieck , Mihai Zanfir , Cristian Sminchisescu

Dietary assessment is a key contributor to monitoring health status. Existing self-report methods are tedious and time-consuming with substantial biases and errors. Image-based food portion estimation aims to estimate food energy values…

Computer Vision and Pattern Recognition · Computer Science 2023-08-04 Zeman Shao , Gautham Vinod , Jiangpeng He , Fengqing Zhu

We propose Unblur-SLAM, a novel RGB SLAM pipeline for sharp 3D reconstruction from blurred image inputs. In contrast to previous work, our approach is able to handle different types of blur and demonstrates state-of-the-art performance in…

Computer Vision and Pattern Recognition · Computer Science 2026-03-31 Qi Zhang , Denis Rozumny , Francesco Girlanda , Sezer Karaoglu , Marc Pollefeys , Theo Gevers , Martin R. Oswald

Colonoscopy is a routine outpatient procedure used to examine the colon and rectum for any abnormalities including polyps, diverticula and narrowing of colon structures. A significant amount of the clinician's time is spent in…

Computer Vision and Pattern Recognition · Computer Science 2022-09-28 Aniruddha Tamhane , Tse'ela Mida , Erez Posner , Moshe Bouhnik

We propose a depth estimation method from a single-shot monocular endoscopic image using Lambertian surface translation by domain adaptation and depth estimation using multi-scale edge loss. We employ a two-step estimation process including…

Image and Video Processing · Electrical Eng. & Systems 2022-01-13 Masahiro Oda , Hayato Itoh , Kiyohito Tanaka , Hirotsugu Takabatake , Masaki Mori , Hiroshi Natori , Kensaku Mori

To support minimally-invasive intraoperative mitral valve repair, quantitative measurements from the valve can be obtained using an infra-red tracked stylus. It is desirable to view such manually measured points together with the endoscopic…

Computer Vision and Pattern Recognition · Computer Science 2022-01-27 Lukas Burger , Lalith Sharan , Samantha Fischer , Julian Brand , Maximillian Hehl , Gabriele Romano , Matthias Karck , Raffaele De Simone , Ivo Wolf , Sandy Engelhardt

We present VGGT-SLAM, a dense RGB SLAM system constructed by incrementally and globally aligning submaps created from the feed-forward scene reconstruction approach VGGT using only uncalibrated monocular cameras. While related works align…

Computer Vision and Pattern Recognition · Computer Science 2025-05-26 Dominic Maggio , Hyungtae Lim , Luca Carlone

We present a generic framework for scale-aware direct monocular odometry based on depth prediction from a deep neural network. In contrast with previous methods where depth information is only partially exploited, we formulate a novel depth…

Robotics · Computer Science 2022-07-25 Carlos Campos , Juan D. Tardós

3D reconstruction from 2D inputs, especially for non-rigid objects like humans, presents unique challenges due to the significant range of possible deformations. Traditional methods often struggle with non-rigid shapes, which require…

Computer Vision and Pattern Recognition · Computer Science 2025-05-26 Fahd Alhamazani , Yu-Kun Lai , Paul L. Rosin

The spinal angle is an important indicator of body balance. It is important to restore the 3D shape of the human body and estimate the spine center line. Existing mul-ti-image-based body restoration methods require expensive equipment and…

Computer Vision and Pattern Recognition · Computer Science 2026-01-06 Sehyun Kim , Hye Jun Lee , Jiwoo Lee , Changgyun Kim , Taemin Lee

The accurate 3D reconstruction of deformable soft body tissues from endoscopic videos is a pivotal challenge in medical applications such as VR surgery and medical image analysis. Existing methods often struggle with accuracy and the…

Computer Vision and Pattern Recognition · Computer Science 2024-01-25 Yangsen Chen , Hao Wang

We present Implicit-Scale 3D Reconstruction from Monocular Multi-Food Images, a benchmark dataset designed to advance geometry-based food portion estimation in realistic dining scenarios. Existing dietary assessment methods largely rely on…

Computer Vision and Pattern Recognition · Computer Science 2026-02-16 Yuhao Chen , Gautham Vinod , Siddeshwar Raghavan , Talha Ibn Mahmud , Bruce Coburn , Jinge Ma , Fengqing Zhu , Jiangpeng He

Visual SLAM systems targeting static scenes have been developed with satisfactory accuracy and robustness. Dynamic 3D object tracking has then become a significant capability in visual SLAM with the requirement of understanding dynamic…

Computer Vision and Pattern Recognition · Computer Science 2022-10-06 Hanwei Zhang , Hideaki Uchiyama , Shintaro Ono , Hiroshi Kawasaki

We present HI-SLAM2, a geometry-aware Gaussian SLAM system that achieves fast and accurate monocular scene reconstruction using only RGB input. Existing Neural SLAM or 3DGS-based SLAM methods often trade off between rendering quality and…

Robotics · Computer Science 2026-02-03 Wei Zhang , Qing Cheng , David Skuddis , Niclas Zeller , Daniel Cremers , Norbert Haala