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An optimization framework for inverse tone mapping using a single low dynamic range image

Authors
Fan, MingLee, Dae-HongKim, Seung-WookKo, Sung-Jea
Issue Date
10월-2019
Publisher
ELSEVIER
Keywords
Inverse tone mapping; Newton-Raphson; Brightness enhancement function
Citation
SIGNAL PROCESSING-IMAGE COMMUNICATION, v.78, pp.274 - 283
Indexed
SCIE
SCOPUS
Journal Title
SIGNAL PROCESSING-IMAGE COMMUNICATION
Volume
78
Start Page
274
End Page
283
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/62770
DOI
10.1016/j.image.2019.07.009
ISSN
0923-5965
Abstract
Conventional inverse tone-mapping (ITM) methods tend to produce contrast distortions such as contrast loss and contrast reversal in reconstructed high dynamic range (HDR) images. This paper proposes a novel ITM optimization framework based on the assumption that the input low dynamic range (LDR) image is similar to the LDR image obtained by tone mapping a true HDR image. In the proposed framework, an HDR image is initially reconstructed by applying a conventional tone-mapping function in a reverse manner, and then the reconstructed HDR image is iteratively modified toward the optimum HDR image by minimizing the difference between the input LDR image and a tone-mapped LDR image obtained from the reconstructed HDR image. The experimental results demonstrate that the proposed framework effectively reconstructs a high-quality HDR image and outperforms other conventional methods in terms of objective quality.
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