Hi, Looks like there are very basic differences in the images. vendor jpg image is 1336 × 1336 ppi 8 bit RGB image. And your png image is 52.598 × 52.598 pixels/mm 16 bit but grayscale image. You might be loosing lot of image information due to selection of grayscale.
You can also use https://pixelcalculator.com for some computation or references. HTH -sudhanwa On Wed, Dec 29, 2021 at 11:06 PM Mayuresh via plug-mail < plug-mail@plug.org.in> wrote: > 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 > _______________________________________________ > plug-mail mailing list > plug-mail@plug.org.in > http://list.plug.org.in/listinfo/plug-mail > -- !~!~!~!~!~!~!~!~!~!~!~!~!~!~!~!~!~!~!~!~!~!~!~!~!~!~!~!~!~!~!~!~! Have you tried IDN/EAI mailing? Check out idnmail.net web: www.sudhanwa.com blog: www.sudhanwa.in Twitter: sudhanwa Check on FB, Linkedin for more.
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