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Remove Impulse Noise from Image

Open Script

This example shows you how to remove impulse noise from an image by using a median filter.

Create Noisy Image

Read an image into the MATLAB® workspace.

I = imread("coins.png");

Add salt-and-pepper noise.

J = imnoise(I,"salt & pepper",0.03);

Explore Model

Open the simulink® model. The model reads the image stored in the variable J from the MATLAB workspace by using an Image From Workspace block.

modelname = "ex_blkmedianfilter.slx";
open_system(modelname);

To remove impulse noise, the model uses a Median Filter block with the default parameters.

The Video Viewer blocks display the noisy image and the median-filtered output image.

Simulate the Model

Run the model. The Video Viewer blocks display the noisy image and the median-filtered output image.

sim(modelname);