Outputs (91)

Eye center localization and gaze gesture recognition for human-computer interaction (2016)
Journal Article

© 2016 Optical Society of America. This paper introduces an unsupervised modular approach for accurate and real-time eye center localization in images and videos, thus allowing a coarse-to-fine, global-to-regional scheme. The trajectories of eye cent... Read More about Eye center localization and gaze gesture recognition for human-computer interaction.

Ptu-024 - photometric stereo reconstruction for surface analysis of mucosal tissue (2015)
Journal Article

This paper provides a novel approach for real-time detection of polyps. Using a photometric stereo sensor for endoscopy imaging in a porcine model, the 3D surface geometry of a porcine gut is recovered. Shape features are extracted from the 3D surfac... Read More about Ptu-024 - photometric stereo reconstruction for surface analysis of mucosal tissue.

A 3D machine vision method for non-invasive assessment of respiratory function (2015)
Journal Article

Copyright © 2015 John Wiley & Sons, Ltd. Background: Respiratory function testing is important for detecting and monitoring illness, however, it is difficult for some patients, such as the young and severely ill, to perform conventional tests that... Read More about A 3D machine vision method for non-invasive assessment of respiratory function.

Combination of 3D skin surface texture features and 2D ABCD features for improved melanoma diagnosis (2015)
Journal Article

© 2015, International Federation for Medical and Biological Engineering. Two-dimensional asymmetry, border irregularity, colour variegation and diameter (ABCD) features are important indicators currently used for computer-assisted diagnosis of malign... Read More about Combination of 3D skin surface texture features and 2D ABCD features for improved melanoma diagnosis.

Testing the validity of Lambert's law for micro-scale photometric stereo applied to paper substrates (2015)
Presentation / Conference Contribution

This paper presents an empirical study to investigate the use of photometric stereo (PS) for micro-scale 3D measurement of paper samples. PS estimates per-pixel surface orientation from images of a surface captured from the same viewpoint but under d... Read More about Testing the validity of Lambert's law for micro-scale photometric stereo applied to paper substrates.

A photometric stereo approach for chronic wound measurement (2015)
Journal Article

© 2015 © Emerald Group Publishing Limited. Purpose-This paper aims to review state of the art of techniques for dimensioning chronic wounds, and validate the possibilities of employing a new proposed optical imaging approach for general task of wound... Read More about A photometric stereo approach for chronic wound measurement.

Long-range concealed object detection through active covert illumination (2015)
Presentation / Conference Contribution

© 2015 SPIE. When capturing a scene for surveillance, the addition of rich 3D data can dramatically improve the accuracy of object detection or face recognition. Traditional 3D techniques, such as geometric stereo, only provide a coarse grained recon... Read More about Long-range concealed object detection through active covert illumination.

An improved photometric stereo through distance estimation and light vector optimization from diffused maxima region (2014)
Journal Article

© 2013 Elsevier B.V. All rights reserved. Although photometric stereo offers an attractive technique for acquiring 3D data using low-cost equipment, inherent limitations in the methodology have served to limit its practical application, particularly... Read More about An improved photometric stereo through distance estimation and light vector optimization from diffused maxima region.

Non contact pulmonary functional testing through an improved photometric stereo approach (2014)
Presentation / Conference Contribution

A non-contact computer vision based system is developed for Pulmonary Functional Testing. The unique and novel features of the system are that it views the patients from both front and back and creates a 3D structure of the whole torso. By observing... Read More about Non contact pulmonary functional testing through an improved photometric stereo approach.

Photometric stereo reconstruction for surface analysis of mucosal tissue (2014)
Presentation / Conference Contribution

We introduce photometric stereo reconstruction for surface analysis of mucosal tissue. Photometric stereo captures images of a surface from a single camera, but illuminated
from different light sources. From the set of images, a detailed surface rec... Read More about Photometric stereo reconstruction for surface analysis of mucosal tissue.