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Contextual and variational contrast enhancement

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Çelik, Turgay and Tjahjadi, Tardi. (2011) Contextual and variational contrast enhancement. IEEE Transactions on Image Processing, Vol.20 (No.12). pp. 3431-3441. ISSN 1057-7149

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Official URL: http://dx.doi.org/10.1109/TIP.2011.2157513

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

Volume:

Vol.20

Number:

No.12

Number of Pages:

Page Range:

pp. 3431-3441

Identification Number:

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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