Code covered by the BSD License

### Highlights from Gaussian Bandpass Filter for Image Processing

5.0
5.0 | 3 ratings Rate this file 55 Downloads (last 30 days) File Size: 2.33 KB File ID: #30947

# Gaussian Bandpass Filter for Image Processing

### Leonardo O. Iheme (view profile)

01 Apr 2011 (Updated )

This function performs Gaussian bandpass filtering in the frequency domain

File Information
Description

Butterworth Bandpass Filter
This simple function was written for my Digital Image Processing course
at Eastern Mediterranean University taught by
Assoc. Prof. Dr. Hasan Demirel
for the 2010-2011 Spring Semester
for the complete report:
http://www.scribd.com/doc/51981950/HW4-Frequency-Domain-Bandpass-Filtering

Written By:
Leonardo O. Iheme (leonardo.iheme@cc.emu.edu.tr)
24th of March 2011

I = The input grey scale image
d0 = Lower cut off frequency
d1 = Higher cut off frequency

The function makes use of the simple principle that a bandpass filter
can be obtained by multiplying a lowpass filter with a highpass filter
where the lowpass filter has a higher cut off frquency than the high pass filter.

Usage GAUSSIANBPF(I,DO,D1)
Example
ima = rgb2gray(ima);
filtered_image = gaussianbpf(ima,30,120);
Gaussian Bandpass Filter

Required Products Image Acquisition Toolbox
Image Processing Toolbox
MATLAB release MATLAB 7.10 (R2010a)
12 Nov 2014 Leonardo O. Iheme

### Leonardo O. Iheme (view profile)

Hello Sudarshan,
Thanks for the 5* rating.
Have you tried initializing with zeros instead? I think you should and then tell us all what happens.

Comment only
11 Nov 2014 Sudarshan

### Sudarshan (view profile)

Why do you initialise the filters that way? lines 45-47. Would be of great help.. Thanks in advance

25 Nov 2013 Anfisa

### Anfisa (view profile)

14 Oct 2013 Robin Martin