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Proceedings Paper

Multispectral colour analysis for quantitative evaluation of pseudoisochromatic color deficiency tests
Author(s): Maris Ozolinsh; Sergejs Fomins
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Paper Abstract

Multispectral color analysis was used for spectral scanning of Ishihara and Rabkin color deficiency test book images. It was done using tunable liquid-crystal LC filters built in the Nuance II analyzer. Multispectral analysis keeps both, information on spatial content of tests and on spectral content. Images were taken in the range of 420-720nm with a 10nm step. We calculated retina neural activity charts taking into account cone sensitivity functions, and processed charts in order to find the visibility of latent symbols in color deficiency plates using cross-correlation technique. In such way the quantitative measure is found for each of diagnostics plate for three different color deficiency carrier types - protanopes, deutanopes and tritanopes. Multispectral color analysis allows to determine the CIE xyz color coordinates of pseudoisochromatic plate design elements and to perform statistical analysis of these data to compare the color quality of available color deficiency test books.

Paper Details

Date Published: 8 November 2010
PDF: 7 pages
Proc. SPIE 7845, Optics in Health Care and Biomedical Optics IV, 78450J (8 November 2010); doi: 10.1117/12.871846
Show Author Affiliations
Maris Ozolinsh, Univ. of Latvia (Latvia)
Sergejs Fomins, Univ. of Latvia (Latvia)

Published in SPIE Proceedings Vol. 7845:
Optics in Health Care and Biomedical Optics IV
Qingming Luo; Ying Gu; Xingde Li, Editor(s)

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