How do I get a median filtered image?

How do I get a median filtered image? I want to convert the first image like the second image using median filter.

Answer 1

[David Young]

If you have the Image Processing Toolbox, you can use medfilt2.

[kiruthika r]

This is not working. Do you have any other option?

[Guillaume]

medfilt2 is designed to do exactly what you asked, so if "it is not working" it's either because you're not using it correctly, or what you've asked is not what you want.

Either way, you need to give more information. What error do you get, or in what way is the result not what you wanted?

[kiruthika r]

When I use medfilt2 code, I am getting the image exactly like my first image.

[Guillaume]

Have you tried increasing the size of the kernel. The default is 3x3. Your desired output image is extremely blurred indicative of a large kernel.

Try

medfilt2(img, [10 10]); %kernel size of 10

Note that even with the default, the output of medfilt2 is never exactly the same as the input (unless your image is just uniform)