All Outputs (44)

Using polarization to estimate surface normals at air-water interfaces for correction of refraction in seafloor imaging (2024)
Journal Article

The retrieval of sea surface normal vectors using shape-from-polarization is investigated for the purpose of correcting for refraction at the water–air interface when imaging from above the water. In shallow clear water and overcast conditions, spect... Read More about Using polarization to estimate surface normals at air-water interfaces for correction of refraction in seafloor imaging.

Experimental investigation of buckling and post-buckling behaviour of repaired composite laminates under in-plane shear loading (2024)
Journal Article

The performance of Ramped Scarf (RS) and Stepped Scarf (SS) repair schemes for highly loaded composite structures has been extensively studied under compressive, tensile, and flexural loadings. However, there is a lack of research on the buckling and... Read More about Experimental investigation of buckling and post-buckling behaviour of repaired composite laminates under in-plane shear loading.

An experimental investigation of tensile residual strength of repaired composite laminates after low velocity impact (2024)
Journal Article

Low Velocity Impact (LVI) of Carbon Fibre Reinforced Polymer (CFRP) components are common during the manufacture and in-service life of aerostructures. However, the resulting effect on structural mechanical properties has not been extensively studied... Read More about An experimental investigation of tensile residual strength of repaired composite laminates after low velocity impact.

An experimental investigation of the impact response and post-impact shear buckling behaviour of hybrid composite laminates (2023)
Journal Article

This paper investigates the effect of transverse impact loading on the in-plane shear behaviour of two laminate configurations. The extensive experimental studies consider a pure carbon laminate (type 1) and a novel X-shaped carbon/glass laminate (ty... Read More about An experimental investigation of the impact response and post-impact shear buckling behaviour of hybrid composite laminates.

Design, novel quality check and experimental test of an original variable length stepped scarf repair scheme (2021)
Journal Article

The performance of well-established stepped scarf repair schemes for highly loaded composite structures has been studied in previous works. However, none of the proposed repair schemes appear to minimise healthy material removal. Thus, this paper pro... Read More about Design, novel quality check and experimental test of an original variable length stepped scarf repair scheme.

Precision fibre angle inspection for carbon fibre composite structures using polarisation vision (2021)
Journal Article

This paper evaluates the precision of polarisation imaging technology for the inspection of carbon fibre composite components. Specifically, it assesses the feasibility of the technology for fibre orientation measurements based on the premise that li... Read More about Precision fibre angle inspection for carbon fibre composite structures using polarisation vision.

A matter of evidence (2020)
Newspaper / Magazine

A computer vision approach to improving cattle digestive health by the monitoring of faecal samples (2020)
Journal Article

The digestive health of cows is one of the primary factors that determine their well-being and productivity. Under- and over-feeding are both commonplace in the beef and dairy industry; leading to welfare issues, negative environmental impacts, and e... Read More about A computer vision approach to improving cattle digestive health by the monitoring of faecal samples.

High-sensitivity analysis of polarization by surface reflection (2018)
Journal Article

© 2018, The Author(s). The exploitation of polarization information in the field of computer vision has become progressively more popular during the last few decades. This is primarily due to (1) the fact that polarization is a source of mostly untap... Read More about High-sensitivity analysis of polarization by surface reflection.

Vanishing point detection for visual surveillance systems in railway platform environments (2018)
Journal Article

© 2018 Elsevier B.V. Visual surveillance is of paramount importance in public spaces and especially in train and metro platforms which are particularly susceptible to many types of crime from petty theft to terrorist activity. Image resolution of vis... Read More about Vanishing point detection for visual surveillance systems in railway platform environments.

Polarisation photometric stereo (2017)
Journal Article

© 2017 This paper concerns a novel approach to fuse two-source photometric stereo (PS) data with polarisation information for complete surface normal recovery for smooth or slightly rough surfaces. PS is a well-established method but is limited in ap... Read More about Polarisation photometric stereo.

Two-source surface reconstruction using polarisation (2017)
Presentation / Conference Contribution

© Springer International Publishing AG 2017. Polarisation vision aims to capture and interpret the polarisation state of incoming light as part of a computer vision system. In this paper, polarisation information is fused with two-source photometric... Read More about Two-source surface reconstruction using polarisation.

Computer vision: A reference guide entries: "Polarization" and "polarized light in computer vision" (2014)
Book Chapter

Entry into "Computer Vision: A reference guide".

BRDF estimation for faces from a sparse dataset using a neural network (2013)
Presentation / Conference Contribution

We present a novel �ve source near-infrared photometric
stereo 3D face capture device. The accuracy of the system is demonstrated by a comparison with ground truth from a commercial 3D scanner. We also use the data from the �ve captured images to mo... Read More about BRDF estimation for faces from a sparse dataset using a neural network.

Face recognition and verification using photometric stereo: The photoface database and a comprehensive evaluation (2013)
Journal Article

This paper presents a new database suitable for both 2-D and 3-D face recognition based on photometric stereo (PS): the Photoface database. The database was collected using a custom-made four-source PS device designed to enable data capture with mini... Read More about Face recognition and verification using photometric stereo: The photoface database and a comprehensive evaluation.

Robust 3D face capture using example-based photometric stereo (2013)
Journal Article

We show that using example-based photometric stereo, it is possible to achieve realistic reconstructions of the human face. The method can handle non-Lambertian reflectance and attached shadows after a simple calibration step. We use spherical harmon... Read More about Robust 3D face capture using example-based photometric stereo.

In vivo measurement of skin microrelief using photometric stereo in the presence of interreflections (2013)
Journal Article

This paper proposes and describes an implementation of a novel photometric stereo based technique for in vivo assessment of three-dimensional (3D) skin topography
in the presence of interreflections. The proposed method illuminates skin with red, gr... Read More about In vivo measurement of skin microrelief using photometric stereo in the presence of interreflections.

Dynamic deflectometry: A novel approach for the on-line reconstruction of specular freeform surfaces (2012)
Journal Article

The dynamic inspection and reverse engineering of specular freeform surfaces is a challenge so far largely unsolved. Products produced in high quantities in industrial environments are still inspected manually which is labour intensive, expensive, mo... Read More about Dynamic deflectometry: A novel approach for the on-line reconstruction of specular freeform surfaces.

A robust multi-scale integration method to obtain the depth from gradient maps (2012)
Journal Article

We describe a robust method for the recovery of the depth map (or height map) from a gradient map (or normal map) of a scene, such as would be obtained by photometric stereo or interferometry. Our method allows for uncertain or missing samples, which... Read More about A robust multi-scale integration method to obtain the depth from gradient maps.

Branch cutting algorithm for unwrapping photoelastic phase map with isotropic point (2012)
Journal Article

A branch cutting algorithm is proposed to solve the wrapped isoclinic causing isochromatic discontinuity and thus to decouple the isoclinicisochromatic interaction of photoelastic phase maps. Rather than pixel by pixel, the branch-cutting isoclinic w... Read More about Branch cutting algorithm for unwrapping photoelastic phase map with isotropic point.