image equalization and cumulative histogram

Following code does equalization on input image and draw the cumulative histogram before and after .

Code:

   I = imread('cameraman.tif'); 
   %% Show current image.
   imshow(I);
   %% draw the cumulative  histogram of  orginal image.
   figure; 
   histogram = imhist(I);%image histogram.
   ch = cumsum(histogram);%cumulative  histogram.
   bar(ch,'BarWidth',1)%draw bar.
   %% image equalization and cumulative histogram 
   figure; 
   J = histeq(I);
   imshow(J);
   figure; 
   histogramEq = imhist(J);%image histogram.
   ch = cumsum(histogramEq);%cumulative  histogram.
   bar(ch,'BarWidth',1)%draw bar.
 

Attachments:

File comment: Before equalization

1.GIF [ 18.73 KiB | Viewed 11817 times ]

File comment: After equalization

2.GIF [ 21.7 KiB | Viewed 11817 times ]

_________________
M. S. Rakha, Ph.D.
Queen's University
Canada

Author: DrRakha
Mastermind

Posts: 2715
Have thanks: 74 time

Page 1 of 1

[ 1 post ]

Related Posts to : image equalization and cumulative histogram
drawing the histogram of image -
Image Colors Frequencies Histogram in Java -
Histogram Generator -
Image-Viewer-Image Processing-Filters-Noise-enhancements -
Move image in front of a background image -
different between cfa image and gray level image -
PNG image to the image you generated -
put image in asp.net -
Image compression -
see image from web cam at my mobile -

Topic Tags

Matlab Image

Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group
All copyrights reserved to codemiles.com 2007-2011
mileX v1.0 designed by codemiles team
Codemiles.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com