Other Languages - Matlab _ image blurring

Asked By hanan shater on 01-Jan-12 01:59 PM
I want to blur an image by removing the high frequencies from the DFT of that image
after reading the image i used the fft command > now i have the frequencies but can't figure out how to remove the high ones


any ideas !!!

Riley K replied to hanan shater on 01-Jan-12 08:00 PM


I am not sure with this,

You can blur image using Convolution Pixel Shader

Refer this links
http://coding-experiments.blogspot.com/2010/07/convolution.html 
http://blogs.mathworks.com/steve/2007/08/13/image-deblurring-introduction/ 


Regards
hanan shater replied to Riley K on 01-Jan-12 09:04 PM
thanks Riley
I found what I was looking for in this Demo

http://www.mathworks.com/matlabcentral/fileexchange/28810-fourier-transform-demonstration/content/fourier_demo/html/fourier_demo.html#1
Jitendra Faye replied to hanan shater on 01-Jan-12 11:26 PM
An image normally consists of an array of 'pixels' each of which are defined by a set of values: red, green, blue and sometimes transparency as well. But for our purposes here we will ignore transparency. Thus each of the red, green and blue 'channels' contain a set of 'intensity' or 'grayscale' values.

follow these links-

http://www.fmwconcepts.com/imagemagick/fourier_transforms/fourier.html
http://www.mathworks.com/help/toolbox/images/f21-17064.html
http://www.cs.uregina.ca/Links/class-info/425/Lab5/index.html

Hope this will help you.