I.R.I.S. Readiris Corporate 12 for Mac User Guide - Manual (Page 36)

Chapter 6 – Adjusting scanned documents
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Note: sometimes smoothening is the only way to separate text from a
colored background.
(Original image)
(Binarized black-and-white image)
(Smoothened image)
o
Use the slider to increase or decrease the Brightness.
The Brightness settings determine the overall brightness of the image.
Use these settings to darken or lighten the image when the text is
illegible.
Example 1: lighten a dark image to eliminate the page background.
(Color image)