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We introduce a novel class of projectors for 3D cone beam tomographic reconstruction. Analytical formulas are derived to compute the relationship between the volume of a voxel projected onto a detector pixel and its contribution to the line…

Image and Video Processing · Electrical Eng. & Systems 2025-03-27 Vojtěch Kulvait , Julian Moosmann , Georg Rose

Semi monolithic detector designs with a series of stacked thin monolithic scintillator plates and side readout are an attractive approach for potentially achieving very high performance in a positron emission tomography (PET) scanner. In…

Instrumentation and Detectors · Physics 2025-02-12 Shiv K. Subedi , Simon R. Cherry , Yi Qiang , Peng Peng

This paper presents VoxelMap++: a voxel mapping method with plane merging which can effectively improve the accuracy and efficiency of LiDAR(-inertial) based simultaneous localization and mapping (SLAM). This map is a collection of voxels…

Robotics · Computer Science 2023-08-08 Yifei Yuan , Chang Wu , Yuan You , Xiaotong Kong , Ying Zhang , Qiyan Li

This paper proposes SOLVR, a unified pipeline for learning based LiDAR-Visual re-localisation which performs place recognition and 6-DoF registration across sensor modalities. We propose a strategy to align the input sensor modalities by…

Computer Vision and Pattern Recognition · Computer Science 2025-02-07 Joshua Knights , Sebastián Barbas Laina , Peyman Moghadam , Stefan Leutenegger

A novel interface reconstruction strategy for volume of fluid (VOF) methods is introduced that represents the liquid-gas interface as two planes that co-exist within a single computational cell. In comparison to the piecewise linear…

Fluid Dynamics · Physics 2024-03-19 Austin Han , Robert Chiodi , Olivier Desjardins

Open-set object detection (OSOD) is highly desirable for robotic manipulation in unstructured environments. However, existing OSOD methods often fail to meet the requirements of robotic applications due to their high computational burden…

Computer Vision and Pattern Recognition · Computer Science 2024-12-30 Yonghao He , Hu Su , Haiyong Yu , Cong Yang , Wei Sui , Cong Wang , Song Liu

A number of applications, such as mobile robots or automated vehicles, use LiDAR sensors to obtain detailed information about their three-dimensional surroundings. Many methods use image-like projections to efficiently process these LiDAR…

Computer Vision and Pattern Recognition · Computer Science 2021-12-01 Larissa T. Triess , David Peter , J. Marius Zöllner

This paper presents CSST-PSFNet, a deep learning method for high-fidelity point spread function (PSF) reconstruction developed for the Chinese Space Station Survey Telescope (CSST). The model integrates a residual neural network, a…

Instrumentation and Methods for Astrophysics · Physics 2026-03-12 Peipei Wang , Peng Wei , Chao Liu , Rui Wang , Feng Wang , Xin Zhang

In this work, we present modeling and imaging performance of a dual panel limited-angle TOF-PET system for intraoperative surgical applications using GATE monte carlo toolkit. Several detector parameters such as detector pixel dimensions,…

Medical Physics · Physics 2024-02-13 Salar Sajedi , Yuemeng Feng , Hamid Sabet

New sensing technologies and more advanced processing algorithms are transforming computer-integrated surgery. While researchers are actively investigating depth sensing and 3D reconstruction for vision-based surgical assistance, it remains…

Image and Video Processing · Electrical Eng. & Systems 2024-01-22 Guido Caccianiga , Julian Nubert , Marco Hutter , Katherine J. Kuchenbecker

Synchrotron-based X-ray computed tomography is widely used for investigating inner structures of specimens at high spatial resolutions. However, potential beam damage to samples often limits the X-ray exposure during tomography experiments.…

Image and Video Processing · Electrical Eng. & Systems 2020-09-30 Ziling Wu , Tekin Bicer , Zhengchun Liu , Vincent De Andrade , Yunhui Zhu , Ian T. Foster

We present a novel method for reconstructing clothed humans from a sparse set of, e.g., 1 to 6 RGB images. Despite impressive results from recent works employing deep implicit representation, we revisit the volumetric approach and…

Computer Vision and Pattern Recognition · Computer Science 2023-07-26 Sicong Tang , Guangyuan Wang , Qing Ran , Lingzhi Li , Li Shen , Ping Tan

Virtual Reality headsets enable users to explore the environment by performing self-induced movements. The retinal velocity produced by such motion reduces the visual system's ability to resolve fine detail. We measured the impact of…

Graphics · Computer Science 2023-01-24 David Petrescu , Paul A. Warren , Zahra Montazeri , Stephen Pettifer

Deformable image registration (DIR) is an enabling technology in many diagnostic and therapeutic tasks. Despite this, DIR algorithms have limited clinical use, largely due to a lack of benchmark datasets for quality assurance during…

Computer Vision and Pattern Recognition · Computer Science 2025-01-17 Edward R Criscuolo , Yao Hao , Zhendong Zhang , Trevor McKeown , Deshan Yang

Positron emission tomography (PET) is a medical imaging method based on the measurement of concentrations of positron-emitting radionuclides in a living body. In the PET imaging system, glucose is labeled with a positron-emitting…

Signal Processing · Electrical Eng. & Systems 2022-09-27 Mehmet Akif Ozdemir , Ali Tangel

The challenging spatial resolution of DWI could be addressed by deep learning based image reconstruction, by reducing noise without increasing acquisition time. To compare the image quality of the Echo Planar Imaging Deep Learning (EPI DL)…

Image and Video Processing · Electrical Eng. & Systems 2024-10-02 Marialena I. Tsarouchi , Antonio Portaluri , Marnix Maas , Ritse M. Mann

Reconstructing images from very long baseline interferometry (VLBI) data with sparse sampling of the Fourier domain (uv-coverage) constitutes an ill-posed deconvolution problem. It requires application of robust algorithms maximizing the…

Instrumentation and Methods for Astrophysics · Physics 2022-10-19 Hendrik Müller , Andrei Lobanov

Facial expression recognition (FER) is a challenging topic in artificial intelligence. Recently, many researchers have attempted to introduce Vision Transformer (ViT) to the FER task. However, ViT cannot fully utilize emotional features…

Computer Vision and Pattern Recognition · Computer Science 2023-03-15 Yu Zhou , Liyuan Guo , Lianghai Jin

Visual challenges in underwater environments significantly hinder the accuracy of vision-based localisation and the high-fidelity dense reconstruction. In this paper, we propose VISO, a robust underwater SLAM system that fuses a stereo…

Robotics · Computer Science 2026-03-09 Shu Pan , Simon Archieri , Ahmet Cinar , Jonatan Scharff Willners , Ignacio Carlucho , Yvan Petillot

Clinical imaging trials play a crucial role in advancing medical innovation but are often costly, inefficient, and ethically constrained. Virtual Imaging Trials (VITs) present a solution by simulating clinical trial components in a…