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http://dx.doi.org/10.7840/kics.2012.37A.12.1054

Multi Scale Tone Mapping Model Using Visual Brightness Functions for HDR Image Compression  

Kwon, Hyuk-Ju (경북대학교 전자전기컴퓨터학부 대학원, 오디오비디오 신호처리 및 자동차전자공학 연구실)
Lee, Sung-Hak (경북대학교 IT대학 전자공학부)
Chae, Seok-Min (경북대학교 전자전기컴퓨터학부 대학원, 오디오비디오 신호처리 및 자동차전자공학 연구실)
Sohng, Kyu-Ik (경북대학교 IT대학 전자공학부, 오디오비디오 신호처리 및 자동차전자공학 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.37A, no.12, 2012 , pp. 1054-1064 More about this Journal
Abstract
HDR (high dynamic range) tone mapping algorithms are used in image processing that reduces the dynamic range of an image to be displayed on LDR (low dynamic range) devices properly. The retinex is one of the tone mapping algorithms to provide dynamic range compression, color constancy, and color rendition. It has been developed through multi-scale methods and luminance-based methods. Retinex algorithms still have drawbacks such as the emphasized noise and desaturation. In this paper, we propose a multi scale tone mapping algorithm for enhancement of contrast, saturation, and noise of HDR rendered images based on visual brightness functions. In the proposed algorithm, HSV color space has been used for preserving the hue and saturation of images. And the algorithm includes the estimation of minimum and maximum luminance level and a visual gamma function for the variation of viewing conditions. And subjective and objective evaluations show that proposed algorithm is better than existing algorithms. The proposed algorithm is expected to image quality enhancement in some fields that require a improvement of the dynamic range due to the changes in the viewing condition.
Keywords
Tone Mapping; Retinex; HDR; HSV Color Space; Brightness Function;
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