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Derivation of Color Confusion Lines for Pseudo-Dichromat Observers from Color Discrimination Thresholds

The objective is to develop a method of defining color confusion lines in the display RGB color space through color discrimination tasks. In the experiment, reference and test square patches were presented side by side on a CRT display. The subject's task is to set the test color where the colo...

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Autores principales: Matsudaira, Kahiro, Shinoda, Hiroyuki, Rattanakasemsuk, Kitiroj, Yamaguchi, Hideki
Formato: Online Artículo Texto
Lenguaje:English
Publicado: SAGE Publications 2011
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5393802/
http://dx.doi.org/10.1068/ic378
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author Matsudaira, Kahiro
Shinoda, Hiroyuki
Rattanakasemsuk, Kitiroj
Yamaguchi, Hideki
author_facet Matsudaira, Kahiro
Shinoda, Hiroyuki
Rattanakasemsuk, Kitiroj
Yamaguchi, Hideki
author_sort Matsudaira, Kahiro
collection PubMed
description The objective is to develop a method of defining color confusion lines in the display RGB color space through color discrimination tasks. In the experiment, reference and test square patches were presented side by side on a CRT display. The subject's task is to set the test color where the color difference from the reference is just noticeable to him/her. In a single trial, the test color was only adjustable along one of 26 directions around the reference. Thus 26 colors with just noticeable difference (JND) were obtained and made up a tube-like or an ellipsoidal shape around each reference. With color-anomalous subjects, the major axes of these shapes should be parallel to color confusion lines that have a common orientation vector corresponding to one of the cone excitation axes L, M, or S. In our method, the orientation vector was determined by minimizing the sum of the squares of the distances from JND colors to each confusion line. To assess the performance the method, the orientation vectors obtained by pseudo-dichromats (color normal observers with a dichromat simulator) were compared to those theoretically calculated from the color vision model used in the simulator.
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spelling pubmed-53938022017-04-24 Derivation of Color Confusion Lines for Pseudo-Dichromat Observers from Color Discrimination Thresholds Matsudaira, Kahiro Shinoda, Hiroyuki Rattanakasemsuk, Kitiroj Yamaguchi, Hideki Iperception Article The objective is to develop a method of defining color confusion lines in the display RGB color space through color discrimination tasks. In the experiment, reference and test square patches were presented side by side on a CRT display. The subject's task is to set the test color where the color difference from the reference is just noticeable to him/her. In a single trial, the test color was only adjustable along one of 26 directions around the reference. Thus 26 colors with just noticeable difference (JND) were obtained and made up a tube-like or an ellipsoidal shape around each reference. With color-anomalous subjects, the major axes of these shapes should be parallel to color confusion lines that have a common orientation vector corresponding to one of the cone excitation axes L, M, or S. In our method, the orientation vector was determined by minimizing the sum of the squares of the distances from JND colors to each confusion line. To assess the performance the method, the orientation vectors obtained by pseudo-dichromats (color normal observers with a dichromat simulator) were compared to those theoretically calculated from the color vision model used in the simulator. SAGE Publications 2011-05-01 2011-05 /pmc/articles/PMC5393802/ http://dx.doi.org/10.1068/ic378 Text en © 2011 SAGE Publications Ltd. Manuscript content on this site is licensed under Creative Commons Licenses http://creativecommons.org/licenses/by-nc-nd/3.0/ This article is distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License (http://www.creativecommons.org/licenses/by-nc-nd/3.0/) which permits non-commercial use, reproduction and distribution of the work as published without adaptation or alteration, without further permission provided the original work is attributed as specified on the SAGE and Open Access page (http://www.uk.sagepub.com/aboutus/openaccess.htm).
spellingShingle Article
Matsudaira, Kahiro
Shinoda, Hiroyuki
Rattanakasemsuk, Kitiroj
Yamaguchi, Hideki
Derivation of Color Confusion Lines for Pseudo-Dichromat Observers from Color Discrimination Thresholds
title Derivation of Color Confusion Lines for Pseudo-Dichromat Observers from Color Discrimination Thresholds
title_full Derivation of Color Confusion Lines for Pseudo-Dichromat Observers from Color Discrimination Thresholds
title_fullStr Derivation of Color Confusion Lines for Pseudo-Dichromat Observers from Color Discrimination Thresholds
title_full_unstemmed Derivation of Color Confusion Lines for Pseudo-Dichromat Observers from Color Discrimination Thresholds
title_short Derivation of Color Confusion Lines for Pseudo-Dichromat Observers from Color Discrimination Thresholds
title_sort derivation of color confusion lines for pseudo-dichromat observers from color discrimination thresholds
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5393802/
http://dx.doi.org/10.1068/ic378
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