These Slides will helpful for the student of signal & system.These slides based on MATLAB software

1. Remove Salt and Pepper Noise from Images
Amin Ur Rehman
Waqas Adnan
Waqar Alam
CECOS UNIVERSITY OF IT & EMERGING SCIENCES PESHAWAR

2. INTRODUCTION
We have use Median filtering Technique for removal of Salt and
Pepper Noise from Images.
Because it can remove salt and pepper noise without significantly
reducing the sharpness of an image.
In this project we have used the Median Filter block to remove salt
and pepper noise from an intensity image.

3. PROCEDURE
STEP 01:
 Define an intensity image in the MATLABworkspace and add
noise to it.
 Typing the code we get the image.
 Coding for image display

4. Codding
>> i=imread('chm.jpg');
>> imshow(i)

6. Now for image size we have the code
>> size(i)
ans =
302 218 2
>> whos i
Name Size Bytes Class Attributes
i 302x218x2 197508 uint8

7. For Pixcel Infomation
>> imtool(i)

8.  Now we add noisy to the above original image by typing the
following code and got the noisy image as shown below.
Coding for getting salt & pepper image:
>> noisy_img = imnoise(i,'salt & pepper',0.02);
>> imshow(noisy_img)

10. Now for removing the noisy we use direct filtering command
“Med filter command” with ‘2’ for two dimensional vector image.
Coding for removing:
k = medfilt2(noisy_img);
close all;
subplot(211);imshow(noisy_img); subplot(212); imshow(k);

13. Contact: aminhera@gmail.com