Avision AVA6 - Manual (Page 31)

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4.2.2 Adjusting Highlight/Shadow Levels
Highlight refers the lightest point in a scanned
image while shadow refers the darkest point.
Using Highlight and Shadow tool together allows
you to extend the range of color and reveal more
details in a gray or color image.
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1. Shadow: The darkest point of an image.
2. Gamma: The midtones of the image.
3. Highlight: The lightest point of an image.
4. Pointer: Move the pointer to change the value.
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