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Optical Engineering

Tone reproduction for high-dynamic range imaging based on adaptive filtering
Author(s): Changwoo Ha; Joohyun Lee; Jechang Jeong
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Paper Abstract

A tone reproduction algorithm with enhanced contrast of high-dynamic range images on conventional low-dynamic range display devices is presented. The proposed algorithm consists mainly of block-based parameter estimation, a characteristic-based luminance adjustment, and an adaptive Gaussian filter using minimum description length. Instead of relying only on the reduction of the dynamic range, a characteristic-based luminance adjustment process modifies the luminance values. The Gaussian-filtered luminance value is obtained from appropriate value of variance, and the contrast is then enhanced through the use of a relation between the adjusted luminance and Gaussian-filtered luminance values. In the final tone-reproduction process, the proposed algorithm combines color and luminance components in order to preserve the color consistency. The experimental results demonstrate that the proposed algorithm achieves a good subjective quality while enhancing the contrast of the image details.

Paper Details

Date Published: 20 March 2014
PDF: 10 pages
Opt. Eng. 53(3) 033103 doi: 10.1117/1.OE.53.3.033103
Published in: Optical Engineering Volume 53, Issue 3
Show Author Affiliations
Changwoo Ha, Hanyang Univ. (Korea, Republic of)
Joohyun Lee, LG Electronics (Korea, Republic of)
Jechang Jeong, Hanyang Univ. (Korea, Republic of)

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