HP 7525 poor scanning of coins and objects

My old HP2725 all in One Scanned coins great, but was getting old & cloudy. My new HP 7525 all in One scans terrible w/brightness & contrast on coins  and looks like fake items. I have tried adjusting b & c, but have to do it on every scan. Is there HP software to correct or improve the poor quality of objects being scanned??

Hi,
This is my first try, using defaults (I've never tried to scan objects before, using a camera instead):
Is this acceptable ?
Regards.
BH
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