Çelik, Turgay and Tjahjadi, Tardi (2011) Contextual and variational contrast enhancement. IEEE Transactions on Image Processing, Vol.20 (No.12). pp. 3431-3441. doi:10.1109/TIP.2011.2157513

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Abstract

This paper proposes an algorithm which enhances the contrast of an input image using inter-pixel contextual information. The algorithm uses a two-dimensional (2D) histogram of the input image constructed using mutual relationship between each pixel and its neighbouring pixels. A smooth 2D target histogram is obtained by minimizing the sum of Frobenius norms of the differences from the input histogram, and the uniformly distributed histogram. The enhancement is achieved by mapping the
diagonal elements of the input histogram to the diagonal elements of the target histogram. Experimental results show that the algorithm produces better or comparable enhanced images than four state-of-the-art algorithms.

Item Type:	Journal Article
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:	Faculty of Science > Engineering
Library of Congress Subject Headings (LCSH):	Image processing -- Digital techniques
Journal or Publication Title:	IEEE Transactions on Image Processing
Publisher:	IEEE
ISSN:	1057-7149
Official Date:	December 2011
Dates:	Date Event December 2011 Published
Date of first compliant deposit:	18 December 2015
Volume:	Vol.20
Number:	No.12
Number of Pages:	11
Page Range:	pp. 3431-3441
DOI:	10.1109/TIP.2011.2157513
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	University of Warwick Vice Chancellor Scholarship

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