Single image-based spatially adaptive dynamic range extension using combined color-channels transmission map
- Authors
- Im, Jaehyun; Yoo, Yoonjong; Paik, Joonki
- Issue Date
- May-2015
- Publisher
- ELSEVIER GMBH, URBAN & FISCHER VERLAG
- Keywords
- Dynamic range extension; Image enhancement; Contrast enhancement; Back lighting compensation
- Citation
- OPTIK, v.126, no.9-10, pp 912 - 916
- Pages
- 5
- Journal Title
- OPTIK
- Volume
- 126
- Number
- 9-10
- Start Page
- 912
- End Page
- 916
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/11389
- DOI
- 10.1016/j.ijleo.2015.02.063
- ISSN
- 0030-4026
1618-1336
- Abstract
- In this paper, a novel dynamic range extension method is presented by detecting under-exposed regions and performing spatially adaptive contrast enhancement. More specifically, a combined color-channels transmission (CCT) map is proposed to detect low-contrast regions, and spatially adaptive gain computation is used to enhance the contrast of the under-exposed regions. As a result, the proposed method can extend the dynamic range of a single input image by changing the brightness of under-exposed regions with preserving the brightness of background. Moreover, the proposed method requires less computational load than existing multiple frames-based high dynamic range (HDR) imaging methods without color distortion. For these reasons, the proposed method can be applied to various imaging devices, such as mobile phone cameras, compact digital cameras, and video surveillance systems. (C) 2015 Elsevier GmbH. All rights reserved.
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- Appears in
Collections - Graduate School of Advanced Imaging Sciences, Multimedia and Film > Department of Imaging Science and Arts > 1. Journal Articles
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