Public bug reported:

I'm digitalizing old receipts. They turned pale. I tried adding more
contrast but the scan result in both (min. , max.) is the same.

I tried different versions of simple scan.
I works fine in xsane.


Description:    Ubuntu 18.04.1 LTS
Release:        18.04

Simple scan: 3.30.1.1-1

Expected output: picture with more contrast
Instead: unreadable picture

Thank you for your time,
Oliver

** Affects: simple-scan (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: contrast simple-scan

** Attachment added: "the original receipt has much better readability."
   https://bugs.launchpad.net/bugs/1796458/+attachment/5197930/+files/doc.jpg

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https://bugs.launchpad.net/bugs/1796458

Title:
  color correction not working

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