Adaptive height-modified histogram equalization and chroma correction in YCbCr color space for fast backlight image compensation
- Authors
- Kang, Bonghyup; Jeon, Changwon; Han, David K.; Ko, Hanseok
- Issue Date
- 7월-2011
- Publisher
- ELSEVIER
- Keywords
- Backlight compensation; Image enhancement; Contrast enhancement; Histogram equalization; Saturation
- Citation
- IMAGE AND VISION COMPUTING, v.29, no.8, pp.557 - 568
- Indexed
- SCIE
SCOPUS
- Journal Title
- IMAGE AND VISION COMPUTING
- Volume
- 29
- Number
- 8
- Start Page
- 557
- End Page
- 568
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/112197
- DOI
- 10.1016/j.imavis.2011.06.001
- ISSN
- 0262-8856
- Abstract
- Automatic exposure controls in commercially available cameras often encounter difficulties in capturing scenes with backlight luminance which dominates the entire image. An Adaptive Height-Modified Histogram Equalization (AHMHE) algorithm is proposed as a compensation technique for backlight images. It simultaneously enhances contrast in both the dark and the bright areas without creating regions of degraded local contrast. Moreover AHMHE is an adaptive algorithm: thus it requires minimal user input, and its reduced computational requirement makes it suitable for real-time application. In addition to AHMHE, a chroma correction technique was applied to chroma components in the YCbCr color space to produce more vivid color images. A series of subjective and index evaluations were conducted to measure the resultant image quality improvements by the AHMHE and the chroma correction algorithms. (C) 2011 Elsevier B.V. All rights reserved.
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