Illuminant color estimation by hue categorization based on gray world assumption

Harumi Kawamura, Shunichi Yonemura, Jun Ohya, Norihiko Matsuura

研究成果: Conference contribution

7 引用 (Scopus)

抜粋

This paper proposes a gray world assumption based method for estimating an illuminant color from an image by hue categorization. The gray world assumption hypothesizes that the average color of all the objects in a scene is gray. However, it is difficult to estimate an illuminant color correctly if the colors of the objects in a scene are dominated by certain colors. To solve this problem, our method uses the opponent color properties that the average of a pair of opponent colors is gray. Thus our method roughly categorizes the colors derived from the image based on hue and selects them one by one from the hue categories until selected colors satisfy the gray world assumption. In our experiments, we used three kinds of illuminants (i.e., CIE standard illuminants A and D65, and a fluorescent light) and two kinds of data sets. One data set satisfies the gray world assumption, and the other does not. Experiment results show that estimated illuminants are closer to the correct ones than those obtained with the conventional method and the estimation error for both using CIE standard illuminants A and D65 by our method are within the barely noticeable difference in human color perception.

元の言語English
ホスト出版物のタイトルProceedings of SPIE-IS and T Electronic Imaging - Computational Imaging IX
DOI
出版物ステータスPublished - 2011 3 29
外部発表Yes
イベントComputational Imaging IX - San Francisco, CA, United States
継続期間: 2011 1 242011 1 25

出版物シリーズ

名前Proceedings of SPIE - The International Society for Optical Engineering
7873
ISSN(印刷物)0277-786X

Conference

ConferenceComputational Imaging IX
United States
San Francisco, CA
期間11/1/2411/1/25

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • これを引用

    Kawamura, H., Yonemura, S., Ohya, J., & Matsuura, N. (2011). Illuminant color estimation by hue categorization based on gray world assumption. : Proceedings of SPIE-IS and T Electronic Imaging - Computational Imaging IX [787312] (Proceedings of SPIE - The International Society for Optical Engineering; 巻数 7873). https://doi.org/10.1117/12.872398