Bandpass filter for image processing

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

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): [e-mail]
 (c) Hasan Demirel: [e-mail]
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)

[alain boyer]

 

[i posh]

dedim gibe bu alan malan'den bisey cikmaz!

[Kemal]

do you know how I can implement your code in SIMULINK?

[V. Poor]

 

[Xing Yu]

 

[Robin Torres]

 

[Mustafa]

can you provide some code for non-ideal filters?

[Nikola]

Very helpful

[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.

[Xu Wings]

 

[Leah]

This code is not good at all. Boo.

[dai zhengguo]

Bad code to read and use.