Deconvolution for pinhole photographs?

It might be possible to determine the point spread function corresponding to the blur, and then correct it. Unfortunately deconvolution is quite noise sensitive, so it will only work if there is very little noise in the images.

Another thing is that the blur must be the same over the whole image. If you e.g. take a picture of a piece of paper with small dots in the center and near the edges of the image, does the dots look similar or are they blurred differently? I guess that if the problem is diffraction then there might be some pattern?

You never really answered his question (one which I have too) and that is do you plan to add deconvolution (such as Richardson Lucy) to this program? I like to do amateur astrophotography, and stars tend to need PSF correction. But the only software that can do that so far is really expensive. If you could add deconvolution to Image Analyzer, that would make a nice free way to do this type of processing.

Actually from what I saw, it has convolution (kernel filter, useful for making blurs, edge-detect, emboss,etc). But it doesn't have DE-convolution. Deconvolution is needed to REMOVE blurs from point sources in images, and I don't think that Image Analyzer is currently able to do that. If it is, then please tell me how to find it in the menu.