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Front. Inform. Technol. Electron. Eng.  2011, Vol. 12 Issue (11): 897-909    DOI: 10.1631/jzus.C1100004
    
Contrast evaluation methods for natural color images in display systems: within- and cross-content evaluations
Qiao-song Chen, Choon-woo Kim*
School of Information and Communication Engineering, Inha University, Incheon 402-751, Korea
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Abstract  Contrast evaluation can be used as a criterion to evaluate performance of contrast enhancement algorithms and to compare contrast capability of display systems. This paper deals with contrast evaluation models for natural color images. Two separate models are defined for within- and cross-content evaluations. The former is to differentiate the perceived contrast of the images with the same content. The latter is to discriminate the differences in contrast among the images with different contents. Perception mechanisms are quite different for within- and cross-content evaluations. Local contrast plays an important role in within-content evaluation. In contrast, global contrast dominates the contrast perception for cross-content evaluation. Results of human visual experiments show that the proposed evaluation models outperform previous methods for both within- and cross-content evaluations.

Key wordsContrast evaluation      Global contrast      Local contrast      Within content      Cross content      Statistical significance     
Received: 02 January 2011      Published: 04 November 2011
CLC:  TP317.4  
Cite this article:

Qiao-song Chen, Choon-woo Kim. Contrast evaluation methods for natural color images in display systems: within- and cross-content evaluations. Front. Inform. Technol. Electron. Eng., 2011, 12(11): 897-909.

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http://www.zjujournals.com/xueshu/fitee/10.1631/jzus.C1100004     OR     http://www.zjujournals.com/xueshu/fitee/Y2011/V12/I11/897


Contrast evaluation methods for natural color images in display systems: within- and cross-content evaluations

Contrast evaluation can be used as a criterion to evaluate performance of contrast enhancement algorithms and to compare contrast capability of display systems. This paper deals with contrast evaluation models for natural color images. Two separate models are defined for within- and cross-content evaluations. The former is to differentiate the perceived contrast of the images with the same content. The latter is to discriminate the differences in contrast among the images with different contents. Perception mechanisms are quite different for within- and cross-content evaluations. Local contrast plays an important role in within-content evaluation. In contrast, global contrast dominates the contrast perception for cross-content evaluation. Results of human visual experiments show that the proposed evaluation models outperform previous methods for both within- and cross-content evaluations.

关键词: Contrast evaluation,  Global contrast,  Local contrast,  Within content,  Cross content,  Statistical significance 
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