Results 31 to 40 of about 296 (144)

Motion and temporal B0‐shift corrections for QSM and R2* mapping using dual‐echo spiral navigators and conjugate‐phase reconstruction

open access: yesMagnetic Resonance in Medicine, Volume 93, Issue 1, Page 199-212, January 2025.
Abstract Purpose To develop an efficient navigator‐based motion and temporal B0‐shift correction technique for 3D multi‐echo gradient‐echo (ME‐GRE) MRI for quantitative susceptibility mapping (QSM) and R2*$$ {\mathrm{R}}_2^{\ast } $$ mapping. Theory and Methods A dual‐echo 3D stack‐of‐spiral navigator was designed to interleave with the Cartesian multi‐
Yuguang Meng   +3 more
wiley   +1 more source

TransPrint: A Method for Fabricating Flexible Transparent Free‐Form Displays

open access: yesAdvances in Human-Computer Interaction, Volume 2019, Issue 1, 2019., 2019
TransPrint is a method for fabricating flexible, transparent free‐form displays based on electrochromism. Using screen‐printing or inkjet printing of electrochromic ink, plus a straightforward assembly process, TransPrint enables rapid prototyping of displays by nonexperts.
Walther Jensen   +5 more
wiley   +1 more source

Using a smartphone‐based digital fundus camera for screening of retinal and optic nerve diseases in veterinary medicine: A preliminary investigation

open access: yesVeterinary Record, Volume 194, Issue 9, 4/11 May 2024.
Abstract Background Ophthalmoscopy is a valuable tool in clinical practice. We report the use of a novel smartphone‐based handheld device for visualisation and photo‐documentation of the ocular fundus in veterinary medicine. Methods Selected veterinary patients of a referral ophthalmology service were included if one or both eyes had clear ocular media,
Lionel Sebbag   +4 more
wiley   +1 more source

On‐Board Correction of Systematic Odometry Errors in Differential Robots

open access: yesJournal of Sensors, Volume 2019, Issue 1, 2019., 2019
An easier method for the calibration of differential drive robots is presented. Most calibration is done on‐board and it is not necessary to spend too much time taking note of the robot’s position. The calibration method does not need a large free space to perform the tests. The bigger space is merely in a straight line, which is easy to find.
S. Maldonado-Bascón   +4 more
wiley   +1 more source

Extrinsics autocalibration for dense planar visual odometry [PDF]

open access: yes, 2014
A single downward-looking camera can be used as a high-precision visual odometry sensor in a wide range of real-world mobile robotics applications. In particular, a simple and computationally efficient dense alignment approach can take full advantage of ...
Zienkiewicz, J, Davison, A
core   +1 more source

A deep‐learning framework for classifying the type, location, and severity of bridge damage using drive‐by measurements

open access: yesComputer-Aided Civil and Infrastructure Engineering, Volume 39, Issue 6, Page 852-871, 15 March 2024.
Abstract This paper proposes a new deep‐learning framework for drive‐by bridge condition monitoring. The proposed approach represents a bridge monitoring regime that enables the presence, type, location, and severity of bridge damage to be identified purely from measurements taken on a passing vehicle, without needing any pre‐measured training data ...
Robert Corbally, Abdollah Malekjafarian
wiley   +1 more source

Autocalibration in the Presence of Critical Motions

open access: yes, 1998
Autocalibration is a difficult problem. Not only is its computation very noisesensitive, but there also exist many critical motions that prevent the estimation of some of the camera parameters. When a "stratified" approach is considered, affine
Demirdjian, David   +8 more
core   +1 more source

Matching algorithm performance analysis for autocalibration method of stereo vision

open access: yes, 2020
Stereo vision is one of the interesting research topics in the computer vision field. Two cameras are used to generate a disparity map, resulting in the depth estimation. Camera calibration is the most important step in stereo vision.
Setyawan, Raden Arief; Brawijaya University   +3 more
core   +2 more sources

High-Quality Virtual Single-Viewpoint Surgical Video: Geometric Autocalibration of Multiple Cameras in Surgical Lights

open access: yes, 2023
Accepted at ...
Yuna Kato   +5 more
openaire   +2 more sources

Practical autocalibration

open access: yes, 2010
As it has been noted several times in literature, the difficult part of autocalibration efforts resides in the structural non-linearity of the search for the plane at infinity.
Andrea Fusiello   +3 more
core   +1 more source

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