I.R.I.S. Cardiris Pro 5 - Manual (Page 65)

Cardiris TM 5 – User Guide
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Adjustment options:
Smoothening
o Select Smoothen to even out the image.
This option renders grayscale and color images more homogeneous by
smoothening out differences in intensity. As a result, a stronger contrast
is created between the foreground (text) and background (artwork).
Note: sometimes smoothening is the only way to separate text from a
colored background.
Brightness
o Use the slider to increase or decrease the Brightness.