Difference between sane and twain output

[sethitanmay]

I have been facing a problem while scanning with sane and twain. I have used same scanner and scanned one object once with twain application( on windows) and with sane application (on linux). Both of them have resulted in different results wherein the one with twain looks to be post processed. It feels as if it has undergone through a gamma correction wherein all black and white becomes absolute black and white respectively.

I am hereby uploading the color histogram for both the image. The one on the right is from twain.

Thanks

[MarkM]

Howdy…

TWAIN drivers tend to be more feature rich and come with more image processing parameters than SANE drivers, even for exactly the same scanner model, so this isn’t too much of a surprise. You should be able to examine the TWAIN capabilities, either through the user interface or programmatically, to see if the TWAIN driver offers a way to get an image that has less processing…

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