[PLUG] Figuring out image transformation given source and target image

[Mayuresh]

I have written this[1] software to extract a dental RVG image from an X
ray sensor connected via USB.

Now I am trying to figure out the image processing required for
post-processing of the acquired image to match the quality of the vendor
supplied proprietary software.

[2] is a sample image produced using the vendor software and [3] is the
raw image acquired using our software mentioned above.

Have tried tweaking brightness, contrast, gamma. These help to some
extent, but are not sufficient. Further, if I print a map of raw vs
refined image pixel values, it shows that the transformation is not a
function of source pixel value alone. There must be some sort of filters
other than above 3 in use.

Using gimp I have experimented with many of the available filters, but
could not get satisfactory results.

If there is any digital image processing expert or enthusiast around,
would appreciate your inputs.

[1] https://github.com/mayureshw/pyrvg
[2] http://mayuresh.sdfeu.org/byvendor.jpg
[3] http://mayuresh.sdfeu.org/bypyrvg.png

-- 
Mayuresh