Color and Contrast Enhancement by Controlled Piecewise Affine Histogram Equalization

• article
• demo
• archive

BibTeX info

Communicated by Pascal Getreuer
Demo edited by Jose-Luis Lisani

Abstract

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.

Download

• full text manuscript: PDF low-res. (1.8M) PDF (18M) ^[?]
• source code: TAR/GZ SWHID info
  Software Heritage Archive @softwareversion{sw-ipol.2012.lps-pae, title = {{Color and Contrast Enhancement by Controlled Piecewise Affine Histogram Equalization}}, author = {Jose-Luis Lisani, Ana Belén Petro, Catalina Sbert}, date = {2012-06-01}, license = {GPL-3.0-or-later}, version = {1.0}, swhid = {swh:1:dir:e6837f53502979a1ef47a81a38767c96c4ba64fa;origin=https://doi.org/10.5201/ipol.2012.lps-pae;visit=swh:1:snp:880aede6df5c9fe916ee352411121f10c5567b0e;anchor=swh:1:rev:940a17c2a501e9df444a1d5169f29c6033abc11d}, related = {ipol.2012.lps-pae}, relatedtype = "Reference article: https://doi.org/10.5201/ipol.2012.lps-pae" } % the biblatex-software style extension is recommended for software bibitems
  Copy to clipboard

History

• Note from the editor: the manuscript of the article was modified on 2022-01-01 to include information about its editors. The original version of the manuscript is available here.