Mr. Tomohiro Ikeda Profile

Tomohiro Ikeda

SPIE Involvement:

Author

Publications (2)

Proceedings Article | 4 February 2013 Paper

Color universal design: analysis of color category dependency on color vision type (4)

Tomohiro Ikeda, Yasuyo Ichihara, Natsuki Kojima, Hisaya Tanaka, Kei Ito

Proceedings Volume 8652, 86520G (2013) https://doi.org/10.1117/12.2001582

KEYWORDS: Color vision, Light sources, Information visualization, Color difference, Analytical research, Visualization, Product engineering, Cognition, Information science, Visual communications

Read Abstract +

This report is af ollow-up to SPIE-IS+T / Vol. 7528 7528051-8, SPIE-IS+T / Vol. 7866 78660J-1-8 and SPIE-IS+T / Vol. 8292 829206-1-8. Colors are used to communicate information in various situations, not just for design and apparel. However, visual information given only by color may be perceived differently by individuals with different color vision types. Human color vision is non-uniform and the variation in most cases is genetically linked to L-cones and M-cones. Therefore, color appearance is not the same for all color vision types. Color Universal Design is an easy-to-understand system that was created to convey color-coded information accurately to most people, taking color vision types into consideration. In the present research, we studied trichromat (C-type), prolan (P-type), and deutan (D-type) forms of color vision. We here report the result of two experiments. The first was the validation of the confusion colors using the color chart on CIELAB uniform color space. We made an experimental color chart (total of color cells is 622, the color difference between color cells is 2.5) for fhis experiment, and subjects have P-type or D-type color vision. From the data we were able to determine "the limits with high probability of confusion" and "the limits with possible confusion" around various basing points. The direction of the former matched with the theoretical confusion locus, but the range did not extend across the entire a* range. The latter formed a belt-like zone above and below the theoretical confusion locus. This way we re-analyzed a part of the theoretical confusion locus suggested by Pitt-Judd. The second was an experiment in color classification of the subjects with C-type, P-type, or D-type color vision. The color caps of fhe 100 Hue Test were classified into seven categories for each color vision type. The common and different points of color sensation were compared for each color vision type, and we were able to find a group of color caps fhat people with C-, P-, and D-types could all recognize as distinguishable color categories. The result could be used as the basis of a color scheme for future Color Universal Design.

Proceedings Article | 25 January 2012 Paper

Color universal design: analysis of color category dependency on color vision type (3)

Natsuki Kojima, Yasuyo Ichihara, Tomohiro Ikeda, Miyuki Kamachi, Kei Ito

Proceedings Volume 8292, 829206 (2012) https://doi.org/10.1117/12.907669

KEYWORDS: Color vision, Color difference, Adaptive optics, Printing, Visualization, Lighting standards, Manufacturing, Inkjet technology, Information science, Visual communications

Read Abstract +

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years