Prof. Sophie Triantaphillidou Profile

Prof. Sophie Triantaphillidou

Professor at Univ. of Westminster

SPIE Involvement:

Editorial Board Member: Journal of Electronic Imaging | Author | Editor

Websites:

Company Website

Publications (20)

Proceedings Article | 8 February 2015 Paper

The effects of scene content, compression, and frame rate on the performance of analytics systems

A. Tsifouti, S. Triantaphillidou, M. C. Larabi, G. Doré, Efthimia Bilissi, A. Psarrou

Proceedings Volume 9396, 93960X (2015) https://doi.org/10.1117/12.2083426

KEYWORDS: Video, Analytics, Cameras, Image quality, Visualization, Video surveillance, Imaging systems, Image quality standards, Switches, Systems modeling

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Proceedings Article | 8 February 2015 Paper

Comparative performance between human and automated face recognition systems, using CCTV imagery, different compression levels, and scene parameters

A. Tsifouti, S. Triantaphillidou, M.-C. Larabi, Efthimia Bilissi, A. Psarrou

Proceedings Volume 9396, 93960M (2015) https://doi.org/10.1117/12.2083325

KEYWORDS: Data modeling, Facial recognition systems, Systems modeling, Cameras, Principal component analysis, Image quality, Imaging systems, Image compression, Complex systems, Video coding

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Proceedings Article | 8 February 2015 Paper

Image quality optimization via application of contextual contrast sensitivity and discrimination functions

Edward Fry, Sophie Triantaphillidou, John Jarvis, Gaurav Gupta

Proceedings Volume 9396, 93960K (2015) https://doi.org/10.1117/12.2082937

KEYWORDS: Image quality, Image filtering, Modulation transfer functions, Spatial frequencies, Contrast sensitivity, RGB color model, Image processing, Imaging systems, Cameras, Buildings

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SPIE Journal Paper | 24 December 2014 Open Access

Special Section Guest Editorial: Image/Video Quality and System Performance

Mohamed-Chaker Larabi, Sophie Triantaphillidou, Andrew Watson

JEI, Vol. 23, Issue 06, 061101, (December 2014) https://doi.org/10.1117/12.10.1117/1.JEI.23.6.061101

KEYWORDS: Image quality, Visualization, Video, Video coding, Quality systems, Imaging systems, Image compression, 3D image processing, Systems modeling, Visual process modeling

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Proceedings Article | 3 February 2014 Paper

Just noticeable differences in perceived image contrast with changes in displayed image size

Jae Young Park, Sophie Triantaphillidou, Ralph Jacobson

Proceedings Volume 9016, 901602 (2014) https://doi.org/10.1117/12.2042534

KEYWORDS: Image filtering, Image quality, LCDs, Image processing, Photovoltaics, Calibration, Scanning electron microscopy, Visualization, Human-machine interfaces, Imaging systems

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Proceedings Article | 3 February 2014 Paper

Perceptibility and acceptability of JPEG 2000 compressed images of various scene types

Elizabeth Allen, Sophie Triantaphillidou, Ralph Jacobson

Proceedings Volume 9016, 90160W (2014) https://doi.org/10.1117/12.2042582

KEYWORDS: Image compression, Distortion, Image processing, Image quality, Visualization, Chromium, Error analysis, Lamps, Algorithms, Visibility

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Proceedings Article | 3 February 2014 Paper

Spatial contrast sensitivity and discrimination in pictorial images

Sophie Triantaphillidou, John Jarvis, Gaurav Gupta

Proceedings Volume 9016, 901604 (2014) https://doi.org/10.1117/12.2040007

KEYWORDS: Image quality, Visualization, Visual process modeling, Contrast sensitivity, Data modeling, Spatial frequencies, Signal detection, Systems modeling, Imaging systems, Image processing

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Proceedings Article | 16 October 2013 Paper

Defining human contrast sensitivity and discrimination from complex imagery

S. Triantaphillidou, J. Jarvis, G. Gupta, H. Rana

Proceedings Volume 8901, 89010C (2013) https://doi.org/10.1117/12.2029194

KEYWORDS: Visualization, Contrast sensitivity, Spatial frequencies, Data modeling, Signal detection, Image filtering, LCDs, Human vision and color perception, Mathematical modeling, Visual process modeling

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Proceedings Article | 4 February 2013 Paper

Contrast sensitivity and discrimination of complex scenes

S. Triantaphillidou, J. Jarvis, G. Gupta

Proceedings Volume 8653, 86530C (2013) https://doi.org/10.1117/12.2006076

KEYWORDS: Spatial frequencies, Visualization, Signal detection, Contrast sensitivity, Visual process modeling, Data modeling, Visual system, LCDs, Mathematical modeling, Image filtering

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Proceedings Article | 4 February 2013 Paper

Acceptable bit-rates for human face identification from CCTV imagery

Anastasia Tsifouti, Sophie Triantaphillidou, Efthimia Bilissi, Mohamed-Chaker Larabi

Proceedings Volume 8653, 865305 (2013) https://doi.org/10.1117/12.2004140

KEYWORDS: Cameras, Video, Video compression, Image compression, Image quality, Computer programming, Image quality standards, Facial recognition systems, Skin, Surveillance

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Proceedings Article | 30 October 2012 Paper

A visual scene busyness measure through a region growing spatial segmentation

Gaurav Gupta, Alexandra Psarrou, Sophie Triantaphillidou, Jae-Young Park

Proceedings Volume 8546, 85460P (2012) https://doi.org/10.1117/12.974760

KEYWORDS: Image segmentation, Visualization, Digital filtering, Silicon, Image filtering, Einsteinium, Bismuth, Image processing algorithms and systems, Image processing, Adaptive control

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Proceedings Article | 25 January 2012 Paper

Evaluation of perceived image sharpness with changes in the displayed image size

Jae Young Park, Sophie Triantaphillidou, Ralph Jacobson, Gaurav Gupta

Proceedings Volume 8293, 82930J (2012) https://doi.org/10.1117/12.908201

KEYWORDS: Image quality, Image filtering, Imaging systems, Modulation transfer functions, Cameras, LCDs, Visualization, Computing systems, Image analysis, Digital imaging

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Proceedings Article | 24 January 2011 Paper

Device-dependent scene-dependent quality predictions using effective pictorial information capacity

Kyung Hoon Oh, Sophie Triantaphillidou, Ralph Jacobson

Proceedings Volume 7867, 78670R (2011) https://doi.org/10.1117/12.871986

KEYWORDS: Image quality, Calibration, Scene classification, Instrument modeling, Imaging systems, Eye, LCDs, Image quality standards, Monte Carlo methods, Performance modeling

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Proceedings Article | 18 January 2010 Paper

Scene classification with respect to image quality measurements

Kyung Hoon Oh, Sophie Triantaphillidou, Ralph Jacobson

Proceedings Volume 7529, 752908 (2010) https://doi.org/10.1117/12.838302

KEYWORDS: Image quality, Scene classification, Quality measurement, Edge detection, MATLAB, Image processing, Algorithm development, Sensors, Imaging technologies, Image analysis

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Proceedings Article | 18 January 2010 Paper

Multidimensional image selection and classification system based on visual feature extraction and scaling

Francesco Mancusi, Sophie Triantaphillidou, Elizabeth Allen

Proceedings Volume 7529, 75290A (2010) https://doi.org/10.1117/12.838734

KEYWORDS: Visualization, Image quality, Feature extraction, Image processing, Image analysis, Algorithm development, Image segmentation, Data storage, Classification systems, Prototyping

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Proceedings Article | 19 January 2009 Paper

Perceptual image attribute scales derived from overall image quality assessments

Kyung Hoon Oh, Sophie Triantaphillidou, Ralph Jacobson

Proceedings Volume 7242, 72420C (2009) https://doi.org/10.1117/12.805848

KEYWORDS: Image quality, Distortion, LCDs, Visualization, Nickel, Bismuth, Cameras, Digital imaging, Calibration, Chlorine

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Proceedings Article | 19 January 2009 Paper

Identification of image attributes that are most affected with changes in displayed image size

Jae Young Park, Sophie Triantaphillidou, Ralph Jacobson

Proceedings Volume 7242, 724210 (2009) https://doi.org/10.1117/12.805844

KEYWORDS: Image quality, Cameras, Colorimetry, LCDs, Digital imaging, Image processing, Optical inspection, Image resolution, Lead, Visualization

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Proceedings Article | 28 January 2008 Paper

Colour analysis and verification of CCTV images under different lighting conditions

R. Smith, K. MacLennan-Brown, J. Tighe, N. Cohen, S. Triantaphillidou, L. MacDonald

Proceedings Volume 6808, 68080Y (2008) https://doi.org/10.1117/12.766343

KEYWORDS: Light sources and illumination, Cameras, Image compression, LCDs, Sodium, Headlamps, Imaging systems, Light sources, Video, Wavelets

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Proceedings Article | 28 January 2008 Paper

Predicting image quality using a modular image difference model

M. Orfanidou, S. Triantaphillidou, E. Allen

Proceedings Volume 6808, 68080F (2008) https://doi.org/10.1117/12.766407

KEYWORDS: Image quality, Image compression, Spatial frequencies, Visualization, Color difference, Image segmentation, Image processing, Image filtering, Visual process modeling, Glasses

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Proceedings Article | 29 January 2007 Paper

Effective pictorial information capacity as an image quality metric

R. Jenkin, S. Triantaphillidou, M. Richardson

Proceedings Volume 6494, 64940O (2007) https://doi.org/10.1117/12.703973

KEYWORDS: Modulation transfer functions, Image quality, Distortion, Imaging systems, Photography, Eye, Point spread functions, Image compression, Signal to noise ratio, Spatial frequencies

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