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Proceedings Paper

HVS-based contrast stretching for color image enhancement
Author(s): Mi Hye Kim; Ick Hoon Jang; Nam Chul Kim
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Paper Abstract

In this paper, we propose a contrast stretching which reflects the visibility of human visual system (HVS) as well as the histogram of a target image. In the proposed method, a target image is contrast-stretched by the auto gain/offset with visibility-based clipping, where the clipping thresholds are decided to maximize the averaged visibility of the contraststretched image. The visibility function is defined by a spatial JND (just noticeable difference), which is the threshold below which any change of a given pixel from its textured neighbors is not perceived by the HVS. Experimental results show that the proposed method efficiently stretch the contrast of target images to be more pleasing to the HVS than some conventional methods.

Paper Details

Date Published: 19 January 2009
PDF: 8 pages
Proc. SPIE 7241, Color Imaging XIV: Displaying, Processing, Hardcopy, and Applications, 724113 (19 January 2009); doi: 10.1117/12.805704
Show Author Affiliations
Mi Hye Kim, Kyungpook National Univ. (Korea, Republic of)
Ick Hoon Jang, Kyungwoon Univ. (Korea, Republic of)
Nam Chul Kim, Kyungpook National Univ. (Korea, Republic of)

Published in SPIE Proceedings Vol. 7241:
Color Imaging XIV: Displaying, Processing, Hardcopy, and Applications
Reiner Eschbach; Gabriel G. Marcu; Shoji Tominaga; Alessandro Rizzi, Editor(s)

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