Alejandro Parraga publications

Chromatic settings and the structural color constancy index

Jordi Roca-Vila, C. Alejandro Parraga, Maria Vanrell

Journal of Vision, Volume 13, Number 4(3), page 1--2 - 2013
IF: 2.727. area: OPHTHALMOLOGY. Quartile: 1.

Low-level Spatio-Chromatic Grouping for Saliency Estimation

Naila Murray, Maria Vanrell, Xavier Otazu, C. Alejandro Parraga

IEEE Transaction on Pattern Analysis and Machine Intelligence - June 2013
IF: 5.694. area: COMPUTER SCIENCE, ARTIFICIAL I. Quartile: 1.

Toward a unified chromatic induction model

Xavier Otazu, C. Alejandro Parraga, Maria Vanrell

Journal of Vision, Volume 10(12), Number 6 - 2010
IF: 3.022. area: OPHTHALMOLOGY. Quartile: 1.

Color Constancy Algorithms: Psychophysical Evaluation on a New Dataset

Javier Vazquez-Corral, C. Alejandro Parraga, Maria Vanrell, Ramon Baldrich

Journal of Imaging Science and Technology , Volume 53, Number 3 - May-June 2009
IF: 0.707. area: IMAGING SCIENCE & PHOTOGRAPHIC. Quartile: 3.

Psychophysical measurements to model inter-colour regions of colour-naming space

C. Alejandro Parraga, Robert Benavente, Maria Vanrell, Ramon Baldrich

Journal of Imaging Science and Technology , Volume 53, Number 3, page 031106-(8) - 2009
IF: 0.391. area: IMAGING SCI. & PHOTO. TECHN.. Quartile: Q4.

Multiresolution Wavelet Framework Models Brightness Induction Effects

Xavier Otazu, Maria Vanrell, C. Alejandro Parraga

Vision Research , Volume 48, Number 5, page 733--751 - 2008
IF: 2.051. area: OPHTHALMOLOGY. Quartile: 2.

Mutiresolution wavelet Framework models brigthness induction effects

Xavier Otazu, Maria Vanrell, C. Alejandro Parraga

Vision Research , Volume 48, page 733--751 - Feb 2008
IF: 2.05. area: ophtalmology. Quartile: 2 14/45.

Evaluation of a Multiscale Color Model for Visual Difference Prediction

P. George Lovell, C. Alejandro Parraga, Tom Troscianko, C. Ripamonti, D.J. Tolhurst

ACM Transactions on Applied Perception, Volume 3, Number 3, page 155-178 - 2006
IF: 1.447. area: COMPUTER SCI., SOFTW. ENGIN.. Quartile: Q2 (2009).

Use of a vision model to quantify the significance of factors effecting target conspicuity

M.A. Gilmore, C.K. Jones, A.W. Haynes, D.J. Tolhurst, M. To, Tom Troscianko, P. George Lovell, C. Alejandro Parraga, K. Pickavance

Proceedings of SPIE, the International Society for Optical Engineering , Volume 6239, page 62390R - April 2006
IF: 0.348. area: Electrical and Electronic Eng.. Quartile: Q3.

Using digital photography to study animal coloration

Martin Stevens, C. Alejandro Parraga, Innes Cuthill, Tom Troscianko

Biological journal of the linnean society, Number 90, page 11--237 - 2006
IF: 2.445. area: Evolutionary Biology . Quartile: Q3.

Disruptive coloration and background pattern matching

Innes Cuthill, Martin Stevens, Jenna Sheppard, Tracey Maddocks, C. Alejandro Parraga, Tom Troscianko

Nature, Number 434, page 72--74 - 2005
IF: 29.27. area: MULTIDISCIPLINARY SCIENCES. Quartile: Q1.

Myoclonus induced by cathode ray tube screens and low-frequency lighting in the European starling (Sturnus vulgaris)

E.L. Smith, J.E. Evans, C. Alejandro Parraga

Veterinary Record, Number 157, page 148--150 - 2005
IF: 1.017. area: VETERINARY SCIENCES. Quartile: Q2.

Stability of the color-opponent signals under changes of illuminant in natural scenes

P. George Lovell, D.J. Tolhurst, C. Alejandro Parraga, R. Baddeley, U. Leonards, Tom Troscianko

Journal of the Optical Society of America A, Volume 22, Number 10, page 2060--2071 - 2005
IF: 1.764. area: OPTICS. Quartile: Q2.

The effects of amplitude-spectrum statistics on foveal and peripheral discrimination of changes in natural images, and a multi-resolution model

C. Alejandro Parraga, Tom Troscianko, D.J. Tolhurst

Vision Research , Number 45, page 3145--3168 - 2005
IF: 2.027. area: Neurosciences. Quartile: Q3.

Spatiochromatic Properties of Natural Images and Human Vision

C. Alejandro Parraga, Tom Troscianko, D.J. Tolhurst

Current Biology, Volume 12, Number 6, page 483--487 - 2002
IF: 7.007. area: BIOCHEMISTRY & MOLE. BIOLOGY.

The effect of contrast randomisation on the discrimination of changes in the slopes of the amplitude spectra of natural scenes

C. Alejandro Parraga, D.J. Tolhurst

Perception, Volume 29, Number 9, page 1101--1116 - 2000
IF: 1.193. area: PSYCHOLOGY.

The human visual system is optimised for processing the spatial information in natural visual images

C. Alejandro Parraga, Tom Troscianko, D.J. Tolhurst

Current Biology, Volume 10, Number 1, page 35--38 - 2000
IF: 8.393. area: BIOCHEMISTRY & MOLE. BIOLOGY.

Color and luminance information in natural scenes

C. Alejandro Parraga, Gavin Brelstaff, Tom Troscianko

Journal of the Optical Society of America A, Volume 15, Number 3, page 563--569 - 1998
IF: 1.645. area: OPTICS.

Which Tone-Mapping is the best? A Comparative Study of Tone-Mapping Perceived Quality

Xim Cerda-Company, C. Alejandro Parraga, Xavier Otazu

Perception - 2014

Predicting categorical colour perception in successive colour constancy

Jordi Roca-Vila, C. Alejandro Parraga, Maria Vanrell

Perception, Volume 41, Number (Suppl.), page 138--138 - 2012
IF: 1.31. area: PSYCHOLOGY. Quartile: 3.

Categorical focal colours are structurally invariant under illuminant changes

Jordi Roca-Vila, C. Alejandro Parraga, Maria Vanrell

Perception, European Conference on Visual Perception (ECVP´11), Volume 40, page 196 - 2011
IF: 1.313. area: PSYCHOLOGY. Quartile: 3.

Do basic colors influence chromatic adaptation?

C. Alejandro Parraga, Jordi Roca-Vila, Maria Vanrell

Journal of Vision, Vision Sciences Society, Volume 11, page 349 - 2011
IF: 3.376. area: OPHTHALMOLOGY. Quartile: 1.

Inter-individual variations in color naming and the structure of 3D color space

Jordi Roca-Vila, A. Owen, G. Jordan, Y. Ling, C. Alejandro Parraga, A. Hurlbert

Journal of Vision, Vision Sciences Society, Volume 11, page 386 - 2011
IF: 3.376. area: OPHTHALMOLOGY. Quartile: 1.

Retinal filtering matches natural image statistics at low luminance levels

C. Alejandro Parraga, Olivier Penacchio, Maria Vanrell

Perception, European Conference on Visual Perception (ECVP´11), Volume 40, page 96 - 2011
IF: 1.313. area: PSYCHOLOGY. Quartile: 3.

What is the best criterion for an efficient design of retinal photoreceptor mosaics?

Olivier Penacchio, C. Alejandro Parraga

Perception, European Conference on Visual Perception (ECVP´11), Volume 40, page 197 - 2011
IF: 1.313. area: PSYCHOLOGY. Quartile: 3.

Natural Scenes Statistics account for Human Cones Ratios

Olivier Penacchio, C. Alejandro Parraga, Maria Vanrell

Perception, European Conference on Visual Perception (ECVP 2010), Number 39, page 101 - 2010
IF: 1.293. area: PSYCHOLOGY. Quartile: 3.

Towards a general model of colour categorization which considers context

C. Alejandro Parraga, Robert Benavente, Maria Vanrell

Perception, European Conference on Visual Perception (ECVP´10), Volume 39, page 86 - Aug 2010
IF: 1.293. area: PSYCHOLOGY. Quartile: 3.

A new cone activation-based natural images dataset.

C. Alejandro Parraga, Javier Vazquez-Corral, Maria Vanrell

Perception, European Conference on Visual Perception (ECVP´09), Volume 38, page 180 - Aug 2009
IF: 1.462. area: PSYCHOLOGY. Quartile: 3.

Colour categories boundaries are better defined in contextual conditions

Robert Benavente, C. Alejandro Parraga, Maria Vanrell

Perception, European Conference on Visual Perception (ECVP 2009), Volume 38, page 36 - Aug 2009
IF: 1.462. area: PSYCHOLOGY. Quartile: 3.

Ordinal pairwise method for natural images comparison

Javier Vazquez-Corral, C. Alejandro Parraga, Maria Vanrell

Perception, European Conference on Visual Perception (ECVP´09), Volume 38, page 180 - 2009
IF: 1.462. area: PSYCHOLOGY. Quartile: 3.

Colour induction effects are modelled by a low-level multiresolution wavelet framework

Xavier Otazu, Maria Vanrell, C. Alejandro Parraga

European Conference on Visual Perception (ECVP'08) - May 2008
IF: 1.61. area: psychology, experimental. Quartile: 2 32/72.

Modelling colour-naming space with fuzzy sets

C. Alejandro Parraga, Robert Benavente, Maria Vanrell, Ramon Baldrich

European Conference on Visual Perception (ECVP'07), Volume 36, page 198 - Aug 2007
IF: 1.61. area: Experimental Psychology. Quartile: 2 32/72.

Multiresolution Wavelet Framework Reproduces Induction Efects

Xavier Otazu, Maria Vanrell, C. Alejandro Parraga

Perception, European Conference on Visual Perception (ECVP´07), Volume 36, page 167 - Aug 2007
IF: 1.617. area: PSYCHOLOGY. Quartile: 3.

Colour vision and illumination noise in primates and birds

Tom Troscianko, P. George Lovell, C. Alejandro Parraga, R. Baddeley, D.J. Tolhurst

Perception, European Conference on Visual Perception (ECVP´06), Volume 35, page 227 - 2006
IF: 1.585. area: PSYCHOLOGY. Quartile: 3.

Detection of cryptic targets in avian vision: A field study

Tom Troscianko, Innes Cuthill, Martin Stevens, L. Graham, S. Richardson, C. Alejandro Parraga

Perception, European Conference on Visual Perception (ECVP´05), Volume 34, page 47b - 2005
IF: 1.391. area: PSYCHOLOGY. Quartile: 3.

Modelling red-green and blue-yellow colour vision

C. Alejandro Parraga, P. George Lovell, Tom Troscianko, D.J. Tolhurst

Perception, European Conference on Visual Perception (ECVP´05), Volume 34, page 155--156b - 2005
IF: 1.391. area: PSYCHOLOGY. Quartile: 3.

Opponent channel responses to changes in the illuminant of natural scenes for primates and birds

P. George Lovell, D.J. Tolhurst, C. Alejandro Parraga, R. Baddeley, U. Leonards, Tom Troscianko

Perception, European Conference on Visual Perception (ECVP´05), Volume 34, page 59b - 2005
IF: 1.391. area: PSYCHOLOGY. Quartile: 3.

A multi-resolution model for human chromatic and achromatic local-contrast discrimination

C. Alejandro Parraga, Tom Troscianko, D.J. Tolhurst

Perception, European Conference on Visual Perception (ECVP´04), Volume 33, page 118b - 2004
IF: 1.271. area: PSYCHOLOGY. Quartile: 3.

Disruptive coloration and background pattern matching in insect crypsis

Martin Stevens, Innes Cuthill, Jenna Sheppard, Tracey Maddocks, Tom Troscianko, C. Alejandro Parraga

Perception, European Conference on Visual Perception (ECVP´04), Volume 33, page 35b - 2004
IF: 1.271. area: PSYCHOLOGY. Quartile: 3.

Natural illumination, shadows, and primate colour vision

Tom Troscianko, C. Alejandro Parraga, P. George Lovell, D.J. Tolhurst, R. Baddeley, U. Leonards

Perception, European Conference on Visual Perception (ECVP´04), Volume 33, page 45b - 2004
IF: 1.271. area: PSYCHOLOGY. Quartile: 3.

Leaves, fruit, shadows, and lighting in Kibale Forest

Tom Troscianko, C. Alejandro Parraga, U. Leonards, R. Baddeley, D.J. Tolhurst

Perception, European Conference on Visual Perception (ECVP´03), Volume 32, page 51b - 2003
IF: 1.259. area: PSYCHOLOGY. Quartile: 3.

Performing a naturalistic visual task when the spatial structure of colour in natural scenes is changed

C. Alejandro Parraga, Tom Troscianko, D.J. Tolhurst

Perception, European Conference on Visual Perception (ECVP´03), Volume 32, page 168b - 2003
IF: 1.259. area: PSYCHOLOGY. Quartile: 3.

Visual discrimination of natural-scene stimuli by amblyopic people

D.J. Tolhurst, C. Alejandro Parraga

Journal of Physiology, Volume 548P, page O75 - 2003

Complex scenes, simple neurons, and complex applications

Tom Troscianko, D.J. Tolhurst, C. Alejandro Parraga

Perception, European Conference on Visual Perception (ECVP´02), Volume 31, page 383b - 2002
IF: 1.314. area: PSYCHOLOGY.

Limitations of a low-level model of discrimination of changes between images

C. Alejandro Parraga, Tom Troscianko, D.J. Tolhurst

Perception, European Conference on Visual Perception (ECVP´02), Volume 31, page 140b - 2002
IF: 1.314. area: PSYCHOLOGY.

Spatiochromatic information in natural scenes

Tom Troscianko, C. Alejandro Parraga, D.J. Tolhurst

Perception, European Conference on Visual Perception (ECVP´02), Volume 31, page 149b - 2002
IF: 1.314. area: PSYCHOLOGY.

Fourier statistics of fruit in foliage - a match with human contrast sensitivity?

C. Alejandro Parraga, Tom Troscianko, D.J. Tolhurst

Perception, European Conference on Visual Perception (ECVP´01), Volume 30, page 109b - 2001
IF: 1.31. area: PSYCHOLOGY.

Human red-green chrominance contrast sensitivity is matched to the spatiochromatic Fourier spectra of images of fruit in foliage

C. Alejandro Parraga, Tom Troscianko, D.J. Tolhurst

Journal of Physiology, Volume 536, page 42P - 2001

Discrimination thresholds for morphed objects in peripheral vision

C. Alejandro Parraga, Tom Troscianko, D.J. Tolhurst

Perception, European Conference on Visual Perception (ECVP´00), Volume 29, page 58b - 2000
IF: 1.193. area: PSYCHOLOGY.

Perceived contrast of natural images is mediated by higher- order image statistics

Tom Troscianko, M. Chirimuuta, C. Alejandro Parraga, D.J. Tolhurst

Perception, European Conference on Visual Perception (ECVP´00), Volume 29, page 82b - 2000
IF: 1.193. area: PSYCHOLOGY.

Stimuli based on natural scenes for studying the contributions of luminance and colour to human spatial vision

D.J. Tolhurst, C. Alejandro Parraga, Tom Troscianko

Journal of Physiology, Volume 527, page 4P - 2000

A computational model predicts discrimination thresholds for morphed objects in natural scenes

C. Alejandro Parraga, D.J. Tolhurst, Tom Troscianko

Perception, European Conference on Visual Perception (ECVP´99), Volume 28, page 127b - 1999
IF: 1.033. area: PSYCHOLOGY.

Discrimination of changes in the slope of the amplitude spectra of complex visual images by human observers may require comparison of contrast between different spatial-frequency bands

C. Alejandro Parraga, D.J. Tolhurst, J.T.C. Lee

Journal of Physiology, Volume 506, page 86P--86P - 1998

How amblyopic vision uses phase and amplitude information in natural images

C. Alejandro Parraga, G.M. Kennedy, D.J. Tolhurst

European Conference on Visual Perception (ECVP'98), Volume 27(2), page 239-240 - 1998

Natural image statistics and visual processing. Are they matched?

C. Alejandro Parraga, D.J. Tolhurst, Tom Troscianko

Perception, European Conference on Visual Perception (ECVP´98), Volume 25, page 152b-153b - 1998
IF: 0.882. area: PSYCHOLOGY.

The human visual system is optimised for discriminating the spatial structure of scenes with natural second-order statistics

C. Alejandro Parraga, D.J. Tolhurst, Tom Troscianko

Journal of Physiology, Volume 512, page 102P - 1998

The use of morphed images in the quantitative study of human spatial vision

D.J. Tolhurst, Tom Troscianko, P.J. Benson, C. Alejandro Parraga

Journal of Physiology, Volume 506, page 11P--12P - 1997

Colour categorization from colour opponency

C. Alejandro Parraga, Ivet Rafegas

European Conference on Visual Perception (ECVP) - 2013
IF: 1.114. Quartile: 4.

Computation of Saliency Maps using Psychophysical Measurements of Colour Induction

Maria Vanrell, Naila Murray, Xavier Otazu, C. Alejandro Parraga

Applied Vision Association (AVA 2012) - 2012

What is constant in colour constancy?

Jordi Roca-Vila, Maria Vanrell, C. Alejandro Parraga

6th European Conference on Colour in Graphics, Imaging, and Vision and 12th International Symposium on Multispectral Colour Science, page 337--343 - May 2012

Saliency Estimation Using a Non-Parametric Low-Level Vision Model

Naila Murray, Maria Vanrell, Xavier Otazu, C. Alejandro Parraga

Computer Vision and Pattern Recognition (CVPR), page 433--440 - 2011

Accurate mapping of natural scenes radiance to cone activation space: a new image dataset

C. Alejandro Parraga, Ramon Baldrich, Maria Vanrell

5th European Conference on Colour in Graphics, Imaging, and Vision - Proceedings of the CGIV 2010, page 50-57 - 2010

Modelling Inter-Colour Regions of Colour Naming Space

C. Alejandro Parraga, Robert Benavente, Maria Vanrell, Ramon Baldrich

European Conference on Colour in Graphics, Imaging and Vision (CGIV'08), page 218--222 - Jun 2008

Towards a Psychophysical Evaluation of Colour Constancy Algorithms

Javier Vazquez-Corral, Maria Vanrell, Ramon Baldrich, C. Alejandro Parraga

European Conference on Colour in Graphics, Imaging and Vision (CGIV'08), page 372--377 - Jun 2008

A multiresolution color model for visual difference prediction

D.J. Tolhurst, C. Alejandro Parraga, P. George Lovell, C. Ripamonti, Tom Troscianko

International conference proceeding series, Volume 95, page 135--138 - 2005

A multiresolution colour model for visual difference prediction

D.J. Tolhurst, C. Alejandro Parraga, P. George Lovell, C. Ripamonti, Tom Troscianko

Perception in graphics and visualization - Aug 2005

Performing a naturalistic task when the spatial structure of colour in natural scenes is changed

C. Alejandro Parraga, Tom Troscianko, D.J. Tolhurst

Applied Vision Association (AVA'03) - Sep 2003

Spatiochromatic properties of images of fruits and leaves from Kibale Forest, Uganda

C. Alejandro Parraga, Tom Troscianko, D.J. Tolhurst, U. Leonards

Vision Sciences Society - May 2003

Spatiochromatic properties of natural images in Kibale Forest, Uganda

C. Alejandro Parraga, Tom Troscianko, D.J. Tolhurst

Function and Evolution of the Primate Visual System - Jul 2003

Visual encoding of green leaves in primate vision

Tom Troscianko, R. Baddeley, C. Alejandro Parraga, U. Leonards

Vision Sciences Society - May 2003

Visual encoding stability of green leaves in primate vision

Tom Troscianko, R. Baddeley, C. Alejandro Parraga, U. Leonards

Function and Evolution of the Primate Visual System - Jul 2003

Spatiochromatic properties of natural images and human vision

C. Alejandro Parraga, Tom Troscianko, D.J. Tolhurst

Third Forum of European Neuroscience - Jul 2002

Perceived contrast of filtered natural images

Tom Troscianko, M. Chirimuuta, C. Alejandro Parraga, D.J. Tolhurst

Applied Vision Association (AVA'99) - Dec 1999

Hyperspectral camera system: acquisition and analysis.

Gavin Brelstaff, C. Alejandro Parraga, Tom Troscianko, Derek Carr

SPIE - Human vision, visual processing and digital displays. Geographic information systems, photogrammetry, and geological/geophysical remote sensing., Volume 2587, page 150--159 - 1995

La influencia del contexto en la definición de las fronteras entre las categorías cromáticas

Robert Benavente, C. Alejandro Parraga, Maria Vanrell

IX Congreso Nacional del Color (CNC'10), page 92--95 - Jun 2010
Language: Spanish

Human and Computational Color Constancy

Jordi Roca-Vila, C. Alejandro Parraga, Maria Vanrell

New Trends and Challenges in Computer Vision: Progress of Research and Development - 2009

Perception Based Representations for Computational Colour

Maria Vanrell, Naila Murray, Robert Benavente, C. Alejandro Parraga, Xavier Otazu, Ramon Baldrich

Computational Color Imaging Workshop, Lecture Notes in Computer Science, Volume 6626 - 2011

Coloresia: An Interactive Colour Perception Device for the Visually Impaired

Abel Gonzalez, Robert Benavente, Olivier Penacchio, Javier Vazquez-Corral, Maria Vanrell, C. Alejandro Parraga

Springer-Verlag, Volume 48, page 47--66 - 2013

The effectiveness of disruptive coloration as a concealment strategy

Martin Stevens, Innes Cuthill, C. Alejandro Parraga, Tom Troscianko

Progress in Brain Research, Visual Perception Part 2 - Fundamentals of Awareness: Multi-Sensory Integration and High-Order Perception, Elsevier, Volume 155, page 49--64 - 2006

Constancy and inconstancy in categorical colour perception

Jordi Roca-Vila

PhD thesis from Universitat Autònoma de Barcelona
Advisors : C. Alejandro Parraga , Maria Vanrell
- Nov 2012

Is the Human visual sytem optimised for encoding the statistical information of natural scenes?

C. Alejandro Parraga

PhD thesis from University of Bristol, England - 2003

Spatiochromatic information content of natural scenes

C. Alejandro Parraga

Master thesis from University of Bristol, England - 1995

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