Peak deconvolution [closed]

I need some help understanding how much information I can pull out of this data. I have a sample made up of two materials. Materials A and material B. Then I took a picture of the sample.

The two materials mix quite well, but not perfectly, so on my image I can see that some areas are mostly material A, some are mostly material B, and most of the areas are a mix between.

I also took an image of a sample consisting only of material A.

On my images material A will look white, and material B will look black.

If I make a histogram of the image of material A (and only A) it has the center around 6 [A.U] which fits my theory. The histogram also has a FWHM of 0.55 [A.U.]

The same histogram of material A & B is centered around 7 [A.U] which also fit my theory since it's a 50:50 mix of A & B and A is centered at 6 [A.U] and B should be centered at 8 [A.U]. The FWHM of this peak 0.64 [A.U] - thus only slightly larger than the image with pure A.

Here's my problem, since the peak with the mix only is slightly wider than the peak for the pure material it means that my resolution i not good enough to distinguish the two materials from each other (if I could see areas with pure material A or B it would be a camel/double-peak, if I could see areas with mostly material A or B I would have a very wide peak - here I only have a slightly wider peak). However, it is still wider, so there must be some kind of information I can subtract.

I'm not really sure what - if any.

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closed as off topic by Qmechanic♦, Sklivvz♦, Manishearth♦Dec 29 '12 at 15:57

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To avoid confusion what is A.U.? – user11547 Oct 22 '12 at 11:30
Arbitrary Units :) – Marcus Oct 22 '12 at 11:41
With 10 rep under your belt you are now able to post images. Exhibiting the histograms would help a lot. There is a certain amount of art to this business. – dmckee Oct 22 '12 at 15:48