Digital Image Enhancement in Matlab: An Overview on Histogram Equalization and Specification

Rezoana Bente Arif; Mohammad Mahmudur Rahman Khan; Md. Abu Bakr Siddique

doi:10.20944/preprints201902.0089.v3

Preprint Article Version 3 This version is not peer-reviewed

Digital Image Enhancement in Matlab: An Overview on Histogram Equalization and Specification

Rezoana Bente Arif ,

Mohammad Mahmudur Rahman Khan ,

Md. Abu Bakr Siddique ^*

Version 3 : Received: 5 February 2019 / Approved: 11 February 2019 / Online: 11 February 2019 (10:42:57 CET)

How to cite: Arif, R.B.; Khan, M.M.R.; Siddique, M.A.B. Digital Image Enhancement in Matlab: An Overview on Histogram Equalization and Specification. Preprints 2019, 2019020089 (doi: 10.20944/preprints201902.0089.v3). Arif, R.B.; Khan, M.M.R.; Siddique, M.A.B. Digital Image Enhancement in Matlab: An Overview on Histogram Equalization and Specification. Preprints 2019, 2019020089 (doi: 10.20944/preprints201902.0089.v3).

Abstract

This paper has two major parts. In the first part histogram equalization for the image enhancement was implemented without using the built-in function in MATLAB. Here, at first, a color image of a rat was chosen and the image was transformed into a grayscale image. After this conversion, histogram equalization was implemented on the grayscale image. Later on, in the same image for each RGB channel, histogram equalization was implemented to observe the effect of histogram equalization on each channel. In the end, the histogram equalization was implemented to this specific color image of a rat. In the second part, for the grayscale image in part 1, the desired histogram of another colored image of a rat was introduced and histogram specification was implemented on the original colored image.

Subject Areas

Digital image processing, color image, grayscale image, histogram equalization, histogram specification, image enhancement, RGB channel

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Download PDF

Comments (0)

Your full name

Your affiliation information (e.g., name of your university/institution/organization)

Not displayed online.

Your Email address (not made public)

Please leave your comment to this article below.

Mathematical equations can be typed in either LaTeX formats \\[ ... \\] or $$ ... $$, or MathML format <math> ... </math>. Try the LaTeX or MathML example.

Type equation:

Preview:

Copy equation into message below

Close menu

Please click a symbol to insert it into the message box below:

Please enter the link here:

Optionally, you can enter text that should appear as linked text:

Copy link into message below

Close menu

Please enter or paste the URL to the image here (please only use links to jpg/jpeg, png and gif images):

Copy image into message below

Close menu

Type author name or keywords to filter the list of references in this group (you can add a new citation under Bibliography):

No existing citations in Discussion Group

Wikify editor is a simple editor for wiki-style mark-up. It was written by MDPI for Sciforum in 2014. The rendering of the mark-up is based on Wiky.php with some tweaks. Rendering of mathematical equations is done with MathJax. Please send us a message for support or for reporting bugs.

Close menu

Please declare any conflicts of interest you may have with this paper, financial or otherwise.

I do not have a conflict of interest

I would like to declare a conflict of interest

Display my name on the website I want to get recognition for my comment on Publons

[what’s this?]. Link your accounts here

Captcha

Renew

I accept the following conditions:

Comments must follow the standards of professional discourse and should focus on the scientific content of the article. Insulting or offensive language, personal attacks and off-topic remarks will not be permitted. Comments must be written in English. Preprints reserves the right to remove comments without notice. Readers who post comments are obliged to declare any competing interests, financial or otherwise.

We encourage comments and feedback from a broad range of readers. See criteria for comments and our diversity statement.

Leave a public comment
Send a private comment to the author(s)

Get PDF Cite Share

Bookmark BibSonomy Mendeley Reddit Delicious Publons

Alerts

Notify me about updates to this article or when a peer-reviewed version is published.