Skip to main content

Research Repository

Advanced Search

Outputs (41)

An experimental investigation of the impact response and post-impact shear buckling behaviour of hybrid composite laminates (2023)
Journal Article
Damghani, M., Saddler, J., Sammon, E., Atkinson, G. A., Matthews, J., & Murphy, A. (2023). An experimental investigation of the impact response and post-impact shear buckling behaviour of hybrid composite laminates. Composite Structures, 305, 116506. https://doi.org/10.1016/j.compstruct.2022.116506

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
Damghani, M., Bolanos, S., Chahar, A., Matthews, J., Atkinson, G. A., Murphy, A., & Edwards, T. (2022). Design, novel quality check and experimental test of an original variable length stepped scarf repair scheme. Composites Part B: Engineering, 230, Article 109542. https://doi.org/10.1016/j.compositesb.2021.109542

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
Atkinson, G., O'Hara Nash, S., & Smith, L. (2021). Precision fibre angle inspection for carbon fibre composite structures using polarisation vision. Electronics, 10(22), Article 2765. https://doi.org/10.3390/electronics10222765

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 computer vision approach to improving cattle digestive health by the monitoring of faecal samples (2020)
Journal Article
Atkinson, G. A., Smith, L. N., Smith, M. L., Reynolds, C. K., Humphries, D. J., Moorby, J. M., …Kingston-Smith, A. H. (2020). A computer vision approach to improving cattle digestive health by the monitoring of faecal samples. Scientific Reports, 10, Article 17557. https://doi.org/10.1038/s41598-020-74511-0

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
Ernst, J. D., & Atkinson, G. (2018). High-sensitivity analysis of polarization by surface reflection. Machine Vision and Applications, 29(7), 1171-1189. https://doi.org/10.1007/s00138-018-0962-7

© 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
Tarrit, K., Molleda, J., Atkinson, G. A., Smith, M. L., Wright, G. C., & Gaal, P. (2018). Vanishing point detection for visual surveillance systems in railway platform environments. Computers in Industry, 98, 153-164. https://doi.org/10.1016/j.compind.2018.03.005

© 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
Atkinson, G. (2017). Polarisation photometric stereo. Computer Vision and Image Understanding, 160, 158-167. https://doi.org/10.1016/j.cviu.2017.04.014

© 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)
Journal Article
Atkinson, G. A., & Atkinson, G. (2017). Two-source surface reconstruction using polarisation. Lecture Notes in Artificial Intelligence, 10270 LNCS, 123-135. https://doi.org/10.1007/978-3-319-59129-2_11

© 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.

BRDF estimation for faces from a sparse dataset using a neural network (2013)
Presentation / Conference
Hansen, M. F., Atkinson, G., & Smith, M. (2013, August). BRDF estimation for faces from a sparse dataset using a neural network. Paper presented at Computer Analysis of Images and Patterns, CAIP 2013, York, UK

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
Smith, L. N., Smith, M. L., Hansen, M. F., Atkinson, G. A., Zafeiriou, S., Atkinson, G., …Smith, L. (2013). Face recognition and verification using photometric stereo: The photoface database and a comprehensive evaluation. IEEE Transactions on Information Forensics and Security, 8(1), 121-135. https://doi.org/10.1109/TIFS.2012.2224109

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.

In vivo measurement of skin microrelief using photometric stereo in the presence of interreflections (2013)
Journal Article
Sohaib, A., Farooq, A., Atkinson, G., Smith, L., Smith, M., & Warr, R. (2013). In vivo measurement of skin microrelief using photometric
stereo in the presence of interreflections. Journal of the Optical Society of America A,

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.

Robust 3D face capture using example-based photometric stereo (2013)
Journal Article
Smith, M. L., Atkinson, G. A., Leitão, H. C., Saracchini, R. F., Saracchini, R., Stolfi, J., …Smith, M. (2013). Robust 3D face capture using example-based photometric stereo. Computers in Industry, 64(9), 1399-1410. https://doi.org/10.1016/j.compind.2013.04.003

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.

Dynamic deflectometry: A novel approach for the on-line reconstruction of specular freeform surfaces (2012)
Journal Article
Wedowski, R. D., Atkinson, G., Smith, M., & Smith, L. (2012). Dynamic deflectometry: A novel approach for the on-line reconstruction of specular freeform surfaces. Optics and Lasers in Engineering, 50(12), 1765-1778. https://doi.org/10.1016/j.optlaseng.2012.07.003

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
Smith, M. L., Atkinson, G. A., Leitão, H. C., Saracchini, R. F., Saracchini, R., Stolfi, J., …Smith, M. (2012). A robust multi-scale integration method to obtain the depth from gradient maps. Computer Vision and Image Understanding, 116(8), 882-895. https://doi.org/10.1016/j.cviu.2012.03.006

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
Lao, F. Y., Liang, H. R., Huang, M. J., Zhang, Y. T., Wedowski, R., Atkinson, G., …Smith, L. (2012). Branch cutting algorithm for unwrapping photoelastic phase map with isotropic point. Optics and Lasers in Engineering, 50(5), 619-631. https://doi.org/10.1016/j.optlaseng.2011.10.013

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.

Face recognition in 2D and 2.5D using ridgelets and photometric stereo (2012)
Journal Article
Smith, M. L., Atkinson, G. A., Kautkar, S. N., Kautkar, S., Atkinson, G., & Smith, M. (2012). Face recognition in 2D and 2.5D using ridgelets and photometric stereo. Pattern Recognition, 45(9), 3317-3327. https://doi.org/10.1016/j.patcog.2012.03.007

A new technique for face recognition - Ridgefaces - is presented. The method combines the well-known Fisherface method with the ridgelet transform and high-speed Photometric Stereo (PS). The paper first derives ridgelet projections for 2D/2.5D face i... Read More about Face recognition in 2D and 2.5D using ridgelets and photometric stereo.

Multi-scale integration of slope data on an irregular mesh (2011)
Presentation / Conference
Saracchini, R., Stolfi, J., Leitão, H., Atkinson, G., & Smith, M. (2011, November). Multi-scale integration of slope data on an irregular mesh. Paper presented at Pacific-Rim Symposium on Image and Video Technology, Gwangju, South Korea, 2011, Gwangju, South Korea

Psychologically inspired dimensionality reduction for 2D and 3D Face Recognition (2011)
Presentation / Conference
Hansen, M. F., Atkinson, G., Smith, M., & Smith, L. (2011, September). Psychologically inspired dimensionality reduction for 2D and 3D Face Recognition. Paper presented at British Machine Vision Conference 2011, Dundee, UK

We present a number of related novel methods for reducing the dimensionality of data for the purposes of 2D and 3D face recognition. Results from psychology show that humans are capable of very good recognition of low resolution images and caricature... Read More about Psychologically inspired dimensionality reduction for 2D and 3D Face Recognition.

The photoface database (2011)
Presentation / Conference
Zafeirou, S., Hansen, M. F., Atkinson, G., Argyriou, V., Petrou, M., Smith, M., & Smith, L. (2011, June). The photoface database. Paper presented at Biometrics Workshop of Computer Vision and Pattern Recognition, Colorado Springs, Colorado, USA

An efficient and practical 3D face scanner using near infrared and visible photometric stereo (2010)
Presentation / Conference
Atkinson, G., Hansen, M. F., Smith, M., & Smith, L. (2010, September). An efficient and practical 3D face scanner using near infrared and visible photometric stereo. Paper presented at International Conference and Exhibition on Biometrics Technology, Coimbatore, India

This paper is concerned with the acquisition of model data for automatic 3D face recognition applications. As 3D methods become progressively more popular in face recognition research, the need for fast and accurate data capture has become crucial. T... Read More about An efficient and practical 3D face scanner using near infrared and visible photometric stereo.

Baseline face recognition using photometric stereo data (2010)
Presentation / Conference
Zafeiriou, S., Hansen, M. F., Atkinson, G., Petrou, M., & Smith, M. (2010, September). Baseline face recognition using photometric stereo data. Paper presented at International Conference and Exhibition on Biometrics Technology, Coimbatore, Tamil Nadu, India, 2010, Coimbatore, Tamil Nadu, India

Face recognition based on ridgelet transforms (2010)
Presentation / Conference
Kautkar, S., Koche, R., Keskar, T., Pande, A., Rane, M., & Atkinson, G. (2010, September). Face recognition based on ridgelet transforms. Paper presented at International Conference and Exhibition on Biometrics Technology, Coimbatore, India

Biologically inspired 3D face recognition from surface normals (2010)
Presentation / Conference
Hansen, M. F., & Atkinson, G. (2010, September). Biologically inspired 3D face recognition from surface normals. Paper presented at Procedia Computer Science, Coimbatore, India

A major consideration in state-of-the-art face recognition systems is the amount of data that is required to represent a face. Even a small (64 × 64) photograph of a face has 2 12 dimensions in which a face may sit. When large (> 1MB) photographs of... Read More about Biologically inspired 3D face recognition from surface normals.

Multi-scale depth from slope with weights (2010)
Presentation / Conference
Saracchini, R., Stolfi, J., Leitão, H., Atkinson, G., & Smith, M. (2010, September). Multi-scale depth from slope with weights. Poster presented at British Machine Vision Conference, Aberystwyth, Wales

We describe a robust method to recover the depth coordinate from a normal or slope map of a scene, obtained e.g. through photometric stereo or interferometry. The key feature of our method is the fast solution of the Poisson-like integration equation... Read More about Multi-scale depth from slope with weights.

3D face reconstructions from photometric stereo using near infrared and visible light (2010)
Journal Article
Hansen, M. F., Atkinson, G., Smith, L., & Smith, M. (2010). 3D face reconstructions from photometric stereo using near infrared and visible light. Computer Vision and Image Understanding, 114(8), 942-951. https://doi.org/10.1016/j.cviu.2010.03.001

This paper seeks to advance the state-of-the-art in 3D face capture and processing via novel Photometric Stereo (PS) hardware and algorithms. The first contribution is a new high-speed 3D data capture system, which is capable of acquiring four raw im... Read More about 3D face reconstructions from photometric stereo using near infrared and visible light.

Correlating plagiocephaly skull deformations with facial asymmetry using projected pattern 3D imaging (2010)
Book Chapter
Atkinson, G., Smith, M., Smith, L., & Warr, R. (2010). Correlating plagiocephaly skull deformations with facial asymmetry using projected pattern 3D imaging. In A. Hierlemann (Ed.), Proceedings of the 7th IASTED International Conference: Biomedical Engineering (BioMED 2010) February 17-19, 2010 Innsbruck, Austria (249-256). Acta Press

In this paper, we present a statistical study into skull deformations caused by positional plagiocephaly. We also consider the hardware used for the assessment of both severity and treatment. State-of-the-art external imaging hardware is employed to... Read More about Correlating plagiocephaly skull deformations with facial asymmetry using projected pattern 3D imaging.

Facial geometry estimation using photometric stereo and profile views (2009)
Journal Article
Atkinson, G., Smith, M., Smith, L., & Farooq, A. (2009). Facial geometry estimation using photometric stereo and profile views. Lecture Notes in Artificial Intelligence, 5558 LNCS, 1-11. https://doi.org/10.1007/978-3-642-01793-3_1

This paper presents a novel method for estimating the three-dimensional shape of faces, facilitating the possibility of enhanced face recognition. The method involves a combined use of photometric stereo and profile view information. It can be divide... Read More about Facial geometry estimation using photometric stereo and profile views.

Facial reconstruction and alignment using photometric stereo and surface fitting (2009)
Journal Article
Farooq, A. R., Atkinson, G., Smith, M., & Smith, L. (2009). Facial reconstruction and alignment using photometric stereo and surface fitting. Lecture Notes in Artificial Intelligence, 5524 LNCS, 88-95. https://doi.org/10.1007/978-3-642-02172-5_13

This paper presents a novel 3D face shape capture device suitable for practical face recognition applications. A new surface fitting based face alignment algorithm is then presented to normalise the pose in preparation for recognition. The 3D data ca... Read More about Facial reconstruction and alignment using photometric stereo and surface fitting.

Facial reconstruction and alignment using photometric stereo and surface fitting (2009)
Presentation / Conference
Atkinson, G., Farooq, A., Smith, M., & Smith, L. (2009, June). Facial reconstruction and alignment using photometric stereo and surface fitting. Paper presented at Iberian Conference on Pattern Recognition and Image Analysis, Povoa de Varzim, Portugal, 2009, Povoa de Varzim, Portugal

The nose on your face may not be so plain: Using the nose as a biometric (2009)
Presentation / Conference
Moorhouse, A., Evans, N., Atkinson, G., Sun, J., & Smith, M. (2009, June). The nose on your face may not be so plain: Using the nose as a biometric. Paper presented at International Conference on Imaging for Crime Detection and Prevention, Kingston-Upon-Thames, London, UK 2009, Kingston-Upon-Thames, London, UK

Facial geometry estimation using photometric stereo and profile views (2009)
Presentation / Conference
Atkinson, G., Smith, M., Smith, L., & Farooq, A. (2009, June). Facial geometry estimation using photometric stereo and profile views. Paper presented at International Conference on Biometrics, Alghero, Sardinia, Italy, 2009, Alghero, Sardinia, Italy

Two-dimensional BRDF estimation from polarisation (2008)
Journal Article
Atkinson, G., & Hancock, E. R. (2008). Two-dimensional BRDF estimation from polarisation. Computer Vision and Image Understanding, 111(2), 126-141. https://doi.org/10.1016/j.cviu.2007.09.005

This paper presents a novel technique for reflectance function (BRDF) estimation, which uses polarisation information and photometric stereo. The first stage of the technique is standard and involves the acquisition of polarisation information (angle... Read More about Two-dimensional BRDF estimation from polarisation.

Shape estimation using polarization and shading from two views (2007)
Journal Article
Hancock, E. R., & Atkinson, G. (2007). Shape estimation using polarization and shading from two views. IEEE Transactions on Pattern Analysis and Machine Intelligence, 29(11), 2001-2017. https://doi.org/10.1109/TPAMI.2007.1099

This paper presents a novel method for 3D surface reconstruction that uses polarization and shading information from two views. The method relies on polarization data acquired using a standard digital camera and a linear polarizer. Fresnel theory is... Read More about Shape estimation using polarization and shading from two views.

Recovery of surface orientation from diffuse polarization (2006)
Journal Article
Hancock, E. R., & Atkinson, G. (2006). Recovery of surface orientation from diffuse polarization. IEEE Transactions on Image Processing, 15(6), 1653-1664. https://doi.org/10.1109/TIP.2006.871114

When unpolarized light is reflected from a smooth dielectric surface, it becomes partially polarized. This is due to the orientation of dipoles induced in the reflecting medium and applies to both specular and diffuse reflection. This paper is concer... Read More about Recovery of surface orientation from diffuse polarization.

High-precision polarization measurements and analysis for machine vision applications
Presentation / Conference
Atkinson, G., Thornton, T., Peynado, D., & Ernst, J. High-precision polarization measurements and analysis for machine vision applications. Paper presented at European Workshop on Visual Information Processing

Polarization is a source of information that is steadily attracting attention in the field of computer vision due to its ability to tap into information not readily available in standard colour or greyscale cameras. Unfortunately, most existing data... Read More about High-precision polarization measurements and analysis for machine vision applications.