3.2 | 13 ratings Rate this file 88 downloads (last 30 days) File Size: 238 KB File ID: #22277

Bandpass filter for image processing

30 Nov 2008

A simple application of FFT2 for an image to simulate the effect of bandpass filter

File Information
Description	This function is a very simple application of FFT2 for an image to simulate the effect of bandpass filter with two cut off frequencies. One can easily modify the programme to do the processes for different images, and even implement highpass and lowpass filter. This programme has been written in Spring 2007, as part of my Image Processing course offered by Assoc. Prof. Dr. Hasan Demirel. You are free to use this code for academic purposes without referring to me, Gholamreza % Anbarjafari (Shahab). The inputs of the function are cutoff frequencies, where as c_off1<c_off2 e.g. c_off1=50 and c_off2=150. (c) Gholamreza Anbarjafari (Shahab): shahab.jafari@emu.edu.tr (c) Hasan Demirel: hasan.demirel@emu.edu.tr http://faraday.ee.emu.edu.tr/hdemirel , http://faraday.ee.emu.edu.tr/shahab
Required Products	Image Processing Toolbox
MATLAB release	MATLAB 7.5 (R2007b)
Zip File Content
Other Files	BPF_Image.m, Ipek.JPG

Tags for This File
Everyone's Tags	image processing filtering
Tags I've Applied
Add New Tags	Please login to tag files.

Comments and Ratings (10)
12 Dec 2008	alain boyer
13 Dec 2008	i posh	dedim gibe bu alan malan'den bisey cikmaz!
30 Mar 2009	Kemal	do you know how I can implement your code in SIMULINK?
05 Apr 2009	V. Poor
05 Apr 2009	Xing Yu
05 Apr 2009	Robin Torres
15 Apr 2009	Mustafa	can you provide some code for non-ideal filters?
23 Apr 2009	Nikola	Very helpful
23 Apr 2009	Thomas Clark	This is barely a function: - Scant description of the required inputs - No input to determine what image you want to analyse - No input to control plotting (arbitrarily spawns figures) - No comments in the code - Nested for loop makes it orders of magnitude slower than it need be - Dependancy on the image processing toolkit which isn't necessary - Ideal cutoff without use of a proper filter will cause very poor quality image processing - unusable for practical purposes. - No function H1 line - No outputs You'll need to address all these issues before your code is even vaguely useful. In the meantime, this is pretty much spam - a single use script hacked together into a function simply by addition of the 'function' line declaration. Please remove it from the FEX - there's pleanty enough spam here already.
24 Apr 2009	Xu Wings

Please login to add a comment or rating.

Tag Activity for this File
Tag	Applied By	Date/Time
image processing filtering	Shahab Anbarjafari	01 Dec 2008 15:41:27

MATLAB Central Terms of Use

NOTICE: Any content you submit to MATLAB Central, including personal information, is not subject to the protections which may be afforded information collected under other sections of The MathWorks, Inc. Web site. You are entirely responsible for all content that you upload, post, e-mail, transmit or otherwise make available via MATLAB Central. The MathWorks does not control the content posted by visitors to MATLAB Central and, does not guarantee the accuracy, integrity, or quality of such content. Under no circumstances will The MathWorks be liable in any way for any content not authored by The MathWorks, or any loss or damage of any kind incurred as a result of the use of any content posted, e-mailed, transmitted or otherwise made available via MATLAB Central. Read the complete Terms prior to use.