ImageGear for C and C++ on Windows v19.10 - Updated
enumIGISISBrightnesses
API Reference Guide > ISIS Component API Reference > ISIS Component Enumerations Reference > enumIGISISBrightnesses

These are all the possible values for the IG_ISIS_TAG_BRIGHTNESS tag.

Values:

IG_ISIS_BRIGHTNESS_AUTO Set brightness value automatically based on real-time sampling during scanning.
IG_ISIS_BRIGHTNESS_DARKEN Lighten the page relative to IG_ISIS_BRIGHTNESS_NORM.
IG_ISIS_BRIGHTNESS_NORM Select a "normal" brightness.
IG_ISIS_BRIGHTNESS_LIGHTEN Darken the page relative to IG_ISIS_BRIGHTNESS_NORM.