All Outputs (11)

Optical Imaging Technology In Colonoscopy - Is There A Role For Photometric Stereo (2020)
Journal Article

Abstract
Colonoscopy screening for the detection and removal of colonic adenomas is central to efforts to reduce the morbidity and mortality of colorectal cancer. However, up to a third of adenomas may be missed at colonoscopy, and the majority of p... Read More about Optical Imaging Technology In Colonoscopy - Is There A Role For Photometric Stereo.

Ensemble-Empirical-Mode-Decomposition based micro-Doppler signal separation and classification (2017)
Journal Article

The target echo signals obtained by Synthetic Aperture Radar (SAR) and Ground Moving Target Indicator (GMTI platforms are mainly composed of two parts, the micro-Doppler signal and the target body part signal. The wheeled vehicle and the track vehicl... Read More about Ensemble-Empirical-Mode-Decomposition based micro-Doppler signal separation and classification.

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.

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.

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.

A novel photometric stereo imaging sensor for endoscopy imaging: Proof of concept studies on a porcine model (2014)
Journal Article

The American Society of Gastroenterology Endoscopy led Preservation and Incorporation of Valuable Endoscopy Innovations initiative has identified real time poly diagnosis as one of the next major technology driven changes in endoscopy (1). A number o... Read More about A novel photometric stereo imaging sensor for endoscopy imaging: Proof of concept studies on a porcine model.

Paper type classification based on a new 3D surface texture measure (2014)
Journal Article

A novel three-dimensional (3D) surface texture measure (3DSTM) is presented based on the micro-geometry of paper surfaces to classify different paper substrates. This is useful to automatically determine whether a document is printed on the correct p... Read More about Paper type classification based on a new 3D surface texture measure.

Real-time recovery of moving 3D faces for emerging applications (2013)
Journal Article

Existing face imaging systems are not suitable to meet the face representation and recognition demands for emerging applications in areas such as interactive gaming, enhanced learning environments and directed advertising. This is mainly due to the p... Read More about Real-time recovery of moving 3D faces for emerging applications.

Human subjectivity to apparent randomness of surface textures (2010)
Presentation / Conference Contribution

Measuring perceived differences in surface texture due to changes in higher order statistics (2010)
Journal Article

We investigate the ability of humans to perceive changes in the appearance of images of surface texture caused by the variation of their higher order statistics. We incrementally randomize their phase spectra while holding their first and second orde... Read More about Measuring perceived differences in surface texture due to changes in higher order statistics.

Change in appearance of textures with randomisation of Fourier phase (2009)
Journal Article

It is known that humans can discriminate visual textures on the basis of differences in statistics higher than the second order. However, these results have been obtained using artificial textures made up of geometric elements, and the effects of man... Read More about Change in appearance of textures with randomisation of Fourier phase.