I am using almost latest DLL's
I have attached files, these are not executable but surely you can get the idea what I have done until now.
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If I understand well your requirement, you can simply call a PostCustomServerAction and send the brightness/contrast values to the server to apply the modifications. All the heavy processes (OCR, image manipulation, conversion, etc..) are always loaded on the server-side with DocuVieware since we want to provide zero footprints to the client. So you will not be able to directly change these parameters by the JS itself.
Do not hesitate to elaborate on it if I missed something.
The difference between the SetBrightness and TWAINSetBrightness methods is if you want to set the brightness at the image acquisition or directly in an existing image.
In order to avoid any old issue that was resolved, could you update the DocuVieware SDK on your machine and change the DLLs/min-js/min-css and test it again, please?
If the issue still occurs, please, could you provide a minimalistic sample that reproduces it?
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