Evaluation of Image Corrected by Retinex Method Based on S-CIELAB and Gazing Information

  • Authors:

  • Jie Bai;Toshiya Nakaguchi;Norimichi Tsumura;Yoichi Miyake

  • Affiliations:

  • The authors are with the Graduate School of Science and Technology, Chiba University, Chiba-shi, 263-8522 Japan. E-mail: baijie@graduate.chiba-u.jp,;The authors are with the Graduate School of Science and Technology, Chiba University, Chiba-shi, 263-8522 Japan. E-mail: baijie@graduate.chiba-u.jp,;The authors are with the Graduate School of Science and Technology, Chiba University, Chiba-shi, 263-8522 Japan. E-mail: baijie@graduate.chiba-u.jp,;The author is with Research Center for Frontier Medical Engineering, Chiba University, Chiba-shi, 263-8522 Japan.

  • Venue:
  • IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
  • Year:
  • 2006

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Abstract

The purpose of this research is to propose an effective color metric which can predict the perceptual image quality for Retinex method. In this paper, we first give a brief introduction of three kinds of typical single Retinex methods to improve the color reproduction. And then, we state the process for obtaining the observer rating value from the subjective evaluation experiment performed under the sRGB illumination condition. Next, we introduce the S-CIELAB metric and propose a new metric on the basis of S-CIELAB metric that considers the gazing information. The average S-CIELAB color differences with and without the consideration of gazing information were calculated as the objective image quality measures. The correlations between the observer rating values and the objective image quality measures were calculated. The result shows that all of the average S-CIELAB color differences based on the gazing information are better correlated to the observer rating value than the average S-CIELAB color difference over the whole area. The average S-CIELAB color difference weighted by the gazing frequency over the gazing area shows the strong correlation with the observer rating value.