Special Section on Image Quality

Gradient approach to quantify the gradation smoothness for output media

[+] Author Affiliations
Youn Jin Kim

Samsung Electronics Company, Digital Printing Division, Suwon, Korea

Yousun Bang

Samsung Electronics Company, Digital Printing Division, Suwon, Korea

Heui-Keun Choh

Samsung Electronics Company, Digital Printing Division, Suwon, Korea

J. Electron. Imaging. 19(1), 011012 (January 08, 2010). doi:10.1117/1.3271139
History: Received May 27, 2009; Revised September 07, 2009; Accepted October 05, 2009; Published January 08, 2010
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We aim to quantify the perception of color gradation smoothness using objectively measurable properties. We propose a model to compute the smoothness of hardcopy color-to-color gradations. It is a gradient-based method that can be determined as a function of the 95th percentile of second derivative for the tone-jump estimator and the fifth percentile of first derivative for the tone-clipping estimator. Performance of the model and a previously suggested method were psychophysically appreciated, and their prediction accuracies were compared to each other. Our model showed a stronger Pearson correlation to the corresponding visual data, and the magnitude of the Pearson correlation reached up to 0.87. Its statistical significance was verified through analysis of variance. Color variations of the representative memory colors—blue sky, green grass and Caucasian skin—were rendered as gradational scales and utilized as the test stimuli.

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© 2010 SPIE and IS&T

Citation

Youn Jin Kim ; Yousun Bang and Heui-Keun Choh
"Gradient approach to quantify the gradation smoothness for output media", J. Electron. Imaging. 19(1), 011012 (January 08, 2010). ; http://dx.doi.org/10.1117/1.3271139


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