Filters








27,454 Hits in 7.4 sec

Incorporation of 3D Model and Panoramic View for Gastroscopic Lesion Surveillance [chapter]

Yun Zong, Weiling Hu, Jiquan Liu, Xu Zhang, Bin Wang, Huilong Duan, Jianmin Si
2015 Lecture Notes in Computer Science  
view; 3D surface modeling using structure from motion.  ...  In this paper, 3D model and panoramic view are incorporated into CAEN with three improvements: selection of reference and tracking features; perspective projection for constructing local and global panoramic  ...  The work was supported by the National Natural Science Foundation of China (No. 31470955) and Zhejiang province key science and technology innovation team (2013TD13).  ... 
doi:10.1007/978-3-319-21963-9_40 fatcat:tdxhilyvevdjjjwhq4byhuvqtu

Localization and mapping of surveillance cameras in city map

Wee Kheng Leow, Cheng-Chieh Chiang, Yi-Ping Hung
2008 Proceeding of the 16th ACM international conference on Multimedia - MM '08  
An important surveillance application is to track the motion of an object of interest, e.g., a car or a human, using one or more cameras, and plot the motion path in a city map.  ...  Quantitative test results show that the method is accurate and robust in camera localization and position mapping.  ...  An important surveillance application is to track the motion of an object of interest, e.g., a car or a human, using one or more cameras, and plot the motion path in a city map.  ... 
doi:10.1145/1459359.1459409 dblp:conf/mm/LeowCH08 fatcat:6csf7blnv5cq5jqcjxewauqq3i

Toward Wide-Area Camera Localization for Mixed Reality [article]

Valeria Garro, Andrea Fusiello
2010 Smart Tools and Applications in Graphics  
In particular we present an accurate localization of the mobile device that leverages on a pre-computed 3D structure to obtain image-model correspondences.  ...  Preliminary experiments with a calibrated camera – indoor and outdoor – demonstrate sufficient accuracy to support mixed reality.  ...  Stefano de Muro for allowing the authors to take pictures the train station of Padova.  ... 
doi:10.2312/localchapterevents/italchap/italianchapconf2010/117-122 dblp:conf/egItaly/GarroF10 fatcat:lxoj2fj5wravrgukcmqs4im6ki

AVP-SLAM: Semantic Visual Mapping and Localization for Autonomous Vehicles in the Parking Lot [article]

Tong Qin, Tongqing Chen, Yilun Chen, Qing Su
2020 arXiv   pre-print
We adopt four surround-view cameras to increase the perception range. Assisting by an IMU (Inertial Measurement Unit) and wheel encoders, the proposed system generates a global visual semantic map.  ...  Accurate localization ability is of great importance. Traditional visual-based methods suffer from tracking lost due to texture-less regions, repeated structures, and appearance changes.  ...  • We propose a novel type of semantic features used in the visual SLAM framework. • We propose a complete mapping and localization system for autonomous driving in the parking lot. • We conduct the real-world  ... 
arXiv:2007.01813v2 fatcat:6l53fbk6gfa5dbdc7xaomm5ooy

A Novel Three-Dimensional Navigation Method for the Visually Impaired [article]

Stanley Shen
2022 arXiv   pre-print
The approach can be used by a wide variety of mobile low-power devices, like cell phones, ensuring this research remains accessible to all.  ...  All in all, this research demonstrates a 3D-based navigation system for the visually impaired.  ...  Acknowledgments Thank you to my parents for supporting my research, Cathy Messenger for mentoring my project, as well as the rest of 2021-2022 ASR class for encouragement and moral support along the way  ... 
arXiv:2206.11136v1 fatcat:632kk3ydobcanc6oqhkwita2ve

Registration Techniques for Clinical Applications of Three-Dimensional

Christopher M. Andrews, Alexander B. Henry, Ignacio M. Soriano, Michael K. Southworth, Jonathan R. Silva
2020 IEEE Journal of Translational Engineering in Health and Medicine  
For this reason, a variety of approaches for improving 3D-AR registration accuracy have been explored.  ...  However, commercially available 3D-AR devices have spatial localization errors that are too large for many clinical procedures.  ...  An external infrared (IR) camera tracks objects with passive IR markers (white spheres) in a coordinate system local to the camera (C).  ... 
doi:10.1109/jtehm.2020.3045642 pmid:33489483 pmcid:PMC7819530 fatcat:rvxdnuytwzb3lclwcmyvxjhlem

Automated surface deformations detection and marking on automotive body panels

V Borsu, A Yogeswaran, P Payeur
2010 2010 IEEE International Conference on Automation Science and Engineering  
The positions of the surface defects are provided to a robotic marking station that handles pose and motion estimation of the part on an assembly line using passive vision.  ...  Starting from a 3D image of the surface of the panel, deformations are extracted and classified automatically.  ...  guide the marking operation.  ... 
doi:10.1109/coase.2010.5584643 dblp:conf/case/BorsuYP10 fatcat:3niz3wxlxbc2tfv5wlfjojayja

Robot-Assisted Distal Locking of Long Bone Intramedullary Nails: Localization, Registration, and In Vitro Experiments [chapter]

Ziv Yaniv, Leo Joskowicz
2004 Lecture Notes in Computer Science  
This paper describes new methods for accurate and robust drill guide and nail hole localization and registration and reports the results of our in-vitro system accuracy experiments.  ...  We are developing an image-guided robot-based system to assist orthopaedic surgeons in performing distal locking of long bone intramedullary nails.  ...  To cope with these challenges, we have developed a novel model-based approach for robust and accurate localization of the drill guide target and nail holes and for the spatial registration of their axes  ... 
doi:10.1007/978-3-540-30136-3_8 fatcat:sxfx4iy24ncr3pzxyewxgglyxa

A stereoscopic fibroscope for camera motion and 3D depth recovery during Minimally Invasive Surgery

D.P. Noonan, P. Mountney, D.S. Elson, A. Darzi, Guang-Zhong Yang
2009 2009 IEEE International Conference on Robotics and Automation  
Images captured by the system have been used to build a 3D map of the environment and reconstruct the laparoscope's 3D pose and motion using a SLAM algorithm.  ...  mounted CCD camera to recover both camera motion and 3D scene information.  ...  ACKNOWLEDGMENT The authors would like to thank the Hamlyn Centre for Robotic Surgery for funding this proof-of-concept study and Drs Andrew Davison, Danail Stoyanov and Phillip Edwards for their support  ... 
doi:10.1109/robot.2009.5152698 dblp:conf/icra/NoonanMEDY09 fatcat:fypyssb63bbbjkilr5o4oz7nji

A monthly quality assurance procedure for 3D surface imaging

H. Omar Wooten, Eric E. Klein, Garima Gokrhoo, Lakshmi Santanam
2010 Journal of Applied Clinical Medical Physics  
AlignRT is a video camera-based patient localization system that captures and compares images of a patient's topography to a DICOM-formatted external contour, then calculates shifts required to accurately  ...  A procedure for periodic quality assurance of a video surface imaging system is introduced.  ...  It uses a CT-derived surface image as a reference and 3D representations of the patient's topography obtained from a video camera-based inroom monitoring system.  ... 
doi:10.1120/jacmp.v12i1.3338 fatcat:4a64gjb7fzdhnez2zywpsfjysu

A monthly quality assurance procedure for 3D surface imaging

H Omar Wooten, Eric E Klein, Garima Gokhroo, Lakshmi Santanam
2010 Journal of Applied Clinical Medical Physics  
AlignRT is a video camera-based patient localization system that captures and compares images of a patient's topography to a DICOM-formatted external contour, then calculates shifts required to accurately  ...  A procedure for periodic quality assurance of a video surface imaging system is introduced.  ...  It uses a CT-derived surface image as a reference and 3D representations of the patient's topography obtained from a video camera-based inroom monitoring system.  ... 
pmid:21330981 pmcid:PMC5718592 fatcat:3bhiv6tzf5hvxog7fcllxo27b4

Coupled structure-from-motion and 3D symmetry detection for urban facades

Duygu Ceylan, Niloy J. Mitra, Youyi Zheng, Mark Pauly
2014 ACM Transactions on Graphics  
We present an optimization framework for extracting repeated elements in images of urban facades, while simultaneously calibrating the input images and recovering the 3D scene geometry using a graph-based  ...  We show that the recovered symmetry information along with the 3D geometry enables a range of novel image editing operations that maintain consistency across the images.  ...  This research has been also supported by a Marie Curie CIG, an Adobe Research grant, and a UCL impact award.  ... 
doi:10.1145/2517348 fatcat:x6nvp3ourzcdrkyowj62nd3pba

Robust extraction of image correspondences exploiting the image scene geometry and approximate camera orientation

B. Alsadik, F. Remondino, F. Menna, M. Gerke, G. Vosselman
2013 The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences  
Image-based modeling techniques are an important tool for producing 3D models in a practical and cost effective manner.  ...  This semi-automatic procedure results in wide-baseline high resolution images covering an object of interest, and including approximations of image orientations, a rough 3D object geometry and a matching  ...  For a more accurate localization of the tie points, the Least Square Matching (LSM) method (Gruen, 1985) is used to refine the localization of the matched points into sub-pixel accuracy (Barazzetti  ... 
doi:10.5194/isprsarchives-xl-5-w1-1-2013 fatcat:mreoibhn2zda3itthl6kbiw32e

Deep Multi-Sensor Lane Detection [article]

Min Bai, Gellert Mattyus, Namdar Homayounfar, Shenlong Wang, Shrinidhi Kowshika Lakshmikanth, Raquel Urtasun
2019 arXiv   pre-print
To address this issue, we propose a novel deep neural network that takes advantage of both LiDAR and camera sensors and produces very accurate estimates directly in 3D space.  ...  Reliable and accurate lane detection has been a long-standing problem in the field of autonomous driving.  ...  Despite very accurate results in camera perspective, the results in 3D are not very accurate.  ... 
arXiv:1905.01555v1 fatcat:72xl3mv2zjhprkhcvulgo2fize

Development and validation of a 3D-printed neuronavigation headset for therapeutic brain stimulation

Farrokh Mansouri, Arsalan Mir-Moghtadaei, Vanathy Niranjan, Jian Shu Wu, Daniyar Akhmedjanov, Mishael Nuh, Terri Cairo, Peter Giacobbe, José Zariffa, Jonathan Downar
2018 Journal of Neural Engineering  
Within-subject accuracy (against a gold-standard centroid of three MRI-guided localizations) for MRI-guided, scalp-measurement, and headset methods was 3.7 ± 1.6 mm, 14.8 ± 7.1 mm, and 9.7 ± 5.2 mm respectively  ...  We present and assess a novel neuronavigation method using commercially-available, inexpensive 3D head scanning, computer-aided design, and 3D-printing tools to fabricate form-fitted headsets for individuals  ...  Funding sources The work was supported by a MITACS Accelerate Grant (#IT05799) to author FM.  ... 
doi:10.1088/1741-2552/aacb96 pmid:29888708 fatcat:jcqljtxyjvh2zi3ho37stdrtlm
« Previous Showing results 1 — 15 out of 27,454 results