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JINHUA WANG, DE XU, CONGYAN LANG AND BING LI
Institute of Computer Science and Engineering
Beijing Jiaotong University
Beijing, 100044 China
Bilateral filter based tone mapping for rendering High Dynamic Range (HDR) images
can not display all details in dark or highlight areas of an image. In order to solve
the problem, we propose a Local Adaptive Bilateral Filter (LABF) method having threefold
improvement over the bilateral filter based method. First, since less correlation between
luminance and chrominance can produce better performance, we choose YUV
color space with less correlation between luminance and chrominance, and only the luminance
component Y is compressed. Second, to imitate the human response to light, we
adjust the logarithmic base adaptively depending on each pixel's luminance value. This
strategy can provide good contrast and detail preservation in dark areas while achieving
the compression of high luminance range. Third, we propose an improved center/surround
method to enhance visibility in the highlight or relatively darker areas further,
which is a non-linear function with a weighted average of surrounding pixel values serving
a variable. The experimental results show that the proposed method LABF can obtain
satisfactory results on various images with different scene contents.
Received September 23, 2008; revised December 4, 2008; accepted April 30, 2009.
Communicated by Liang-Gee Chen.
* This work is supported by National Nature Science Foundation of China (60803072) and Bejjing Jiaotong
University Science Foundation (2007XM008), National High Technology Research of China (2007AA-
01Z168).