Applying smoothing to image

How can I apply smoothing to the image with 3*3 filter mask without Image Processing Tool Box (Manually)

Answer 1

[Image Analyst]

Is it gray scale or color? And this seems to be the hot topic of the month. There are so many threads lately on manually computing blurring or filtering of images with nested for loops - just search for them. I'm attaching my demo.

[Michel Joge]

It is gray scale color. Thank you for attaching a demo!

Answer 2

[Rik]

A convolution may be what you need.

mask=rand(3,3);mask=mask/sum(mask(:));
IM=uint8(randi(255,100,100));

IM2=convn(IM,mask,'same');

[Michel Joge]

Thank you!

Answer 3

[magramane khadidja]

how smoothing image for done by filling up the small regions and dilating the boundary of the thresholded image?

[Rik]

How does this answer the question?

[Rik]

Have a read here and here. It will greatly improve your chances of getting an answer.

That is the best help I can give you.

[magramane khadidja]

[Rik]

If you don't bother to read my comment and the advice in it, why should I bother helping you?

[Image Analyst]

@magramane khadidja, since this "Answer" has nothing to do with @Michel Joge's question we won't answer you here. We'll answer you in your own question that you should post after reading this:

TUTORIAL: How to ask a question (on Answers) and get a fast answer

because we don't think @Michel Joge wants to get emails every time there is some activity about your question, and that would happen if we were to continue this discussion with you here. If you want, you can reply with a link to your new question and then we can answer it there and then we'll delete your "Answer" to Michel that you posted here. In the meantime, look up conv2(), imfilter(), bwareaopen(), bwareafilt(), and imfill() -- depending on exactly what you want to do, the solution will involve one or more of those functions.

[magramane khadidja]

@Image Analyst yes i want

[Image Analyst]

@magramane khadidja, it's still showing you as not having posted a question of your own (in a new thread like I asked). Where is it? What's the link? Over there, give your code with the functions I listed, and attach your image.