Is it normal, when applying gaussian oder median filter to image-profile, the counts increase significantly?

Hello everyone,

I've got a huge problem right now. I'm analyzing some images in Matlab and do create average verticle profiles from the center of the image therefore. When applying a median filter or a gaussian filter to it, the peak/counts increases significantly up to 10%. Is this normal for these kind of filter and is there any other filtering option?

This is how I use them:

    for j = 1:numofim
          ImStack_filter(:,:,j) = medfilt2(ImStack_filter(:,:,j),[med_filt_size med_filt_size]);
    end

    for j = 1:numofim
          ImStack_filter(:,:,j) = imgaussfilt(ImStack_filter(:,:,j),sigma);
    end

Sigma and med_filt_size are the variables in there to adjust to filters.

i hope anyone can help me.

Thank you

[Image Analyst]

You know what an "average verticle profile" but we don't. Attach images or plots that illustrate your problem.