Color and Contrast Enhancement by Controlled Piecewise Affine Histogram Equalization

Color and Contrast Enhancement by Controlled Piecewise Affine Histogram Equalization

This paper presents a simple contrast enhancement algorithm based on histogram equalization (HE). The proposed algorithm performs a piecewise affine transform of the intensity levels of a digital image such that the new cumulative distribution function will be approximately uniform (as with HE), but...

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Bibliographic Details
Main Authors: Jose-Luis Lisani, Ana-Belen Petro, Catalina Sbert
Format: Article
Language:English
Published: Image Processing On Line 2012-10-01
Series:Image Processing On Line
Online Access:http://www.ipol.im/pub/art/2012/lps-pae/
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spelling doaj-8fa7e6a4d8664a72a9a98c8f84b7b8f22020-11-24T22:41:36ZengImage Processing On LineImage Processing On Line2105-12322012-10-01224326510.5201/ipol.2012.lps-paeColor and Contrast Enhancement by Controlled Piecewise Affine Histogram EqualizationJose-Luis LisaniAna-Belen PetroCatalina SbertThis paper presents a simple contrast enhancement algorithm based on histogram equalization (HE). The proposed algorithm performs a piecewise affine transform of the intensity levels of a digital image such that the new cumulative distribution function will be approximately uniform (as with HE), but where the stretching of the range is locally controlled to avoid brutal noise enhancement. We call this algorithm Piecewise Affine Equalization (PAE). Several experiments show that, in general, the new algorithm improves HE results.http://www.ipol.im/pub/art/2012/lps-pae/
collection DOAJ
language English
format Article
sources DOAJ
author Jose-Luis Lisani
Ana-Belen Petro
Catalina Sbert
spellingShingle Jose-Luis Lisani
Ana-Belen Petro
Catalina Sbert
Color and Contrast Enhancement by Controlled Piecewise Affine Histogram Equalization
Image Processing On Line
author_facet Jose-Luis Lisani
Ana-Belen Petro
Catalina Sbert
author_sort Jose-Luis Lisani
title Color and Contrast Enhancement by Controlled Piecewise Affine Histogram Equalization
title_short Color and Contrast Enhancement by Controlled Piecewise Affine Histogram Equalization
title_full Color and Contrast Enhancement by Controlled Piecewise Affine Histogram Equalization
title_fullStr Color and Contrast Enhancement by Controlled Piecewise Affine Histogram Equalization
title_full_unstemmed Color and Contrast Enhancement by Controlled Piecewise Affine Histogram Equalization
title_sort color and contrast enhancement by controlled piecewise affine histogram equalization
publisher Image Processing On Line
series Image Processing On Line
issn 2105-1232
publishDate 2012-10-01
description This paper presents a simple contrast enhancement algorithm based on histogram equalization (HE). The proposed algorithm performs a piecewise affine transform of the intensity levels of a digital image such that the new cumulative distribution function will be approximately uniform (as with HE), but where the stretching of the range is locally controlled to avoid brutal noise enhancement. We call this algorithm Piecewise Affine Equalization (PAE). Several experiments show that, in general, the new algorithm improves HE results.
url http://www.ipol.im/pub/art/2012/lps-pae/
work_keys_str_mv AT joseluislisani colorandcontrastenhancementbycontrolledpiecewiseaffinehistogramequalization
AT anabelenpetro colorandcontrastenhancementbycontrolledpiecewiseaffinehistogramequalization
AT catalinasbert colorandcontrastenhancementbycontrolledpiecewiseaffinehistogramequalization
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