New visualization method for high dynamic range images in low dynamic range devices

Jun Hyung Kim, Hoon Kim, Sung Jea Ko

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Various tone reproduction operators have been proposed to display high dynamic range images on low dynamic range (LDR) devices. The gradient domain operator is a good candidate due to its capability of reducing the dynamic range and avoiding common artifacts including halos and loss of image details. However the gradient domain operator requires high computational complexity and often introduces low-frequency artifacts such as reversal of contrast between distant image patches. In order to solve these problems we present a new gradient domain tone reproduction method which adopts an energy functional with two terms one for preserving global contrast and the other for enhancing image details. In the proposed method the LDR image is obtained by minimizing the proposed energy functional through a numerical method. Simulation results demonstrate that the proposed method can not only achieve the significantly reduced computational complexity but also exhibit better visual quality as compared with conventional algorithms.

Original languageEnglish
Article number3640821
JournalOptical Engineering
Issue number10
Publication statusPublished - 2011

Bibliographical note

Funding Information:
This research was supported by Mid-career Researcher Program through National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (no. 2011-0000200).


  • Conjugate-gradient method
  • Gradient domain
  • High dynamic range image
  • Tone reproduction

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • General Engineering


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