3.
8
The Color Channel radio buttons are used to specify the color channel in
which to change the Highlight, Shadow and Midtone values.
The only channel available to be selected when using your machine to scan
is the Gray channel. Red, Green and Blue are used for scanners capable of
scanning documents in color.
Highlight
Balance Tab
Color Channel
The Highlight value represents the lightest value in an image. All pixels
above this point will be rendered as pure white. If you subsequently
broaden the highlight points on the Level Adjustment graph, the pixels
will be remapped within the new range, thus allowing you to see more
detail in the image.
The Highlight scroll bar allows you to manually set a highlight level. The
default for the Highlight settings is 255. You can increase or decrease the
highlights in a particular image as needed by adjusting this scroll bar. The
value in the adjacent box will change in the range 1 to 255 as the slider
moves.
Shadow
The Shadow value represents the darkest value in an image. All pixels
below this point will be rendered as pure black. If you subsequently
broaden the shadow points on the Level Adjustment graph, the pixels will
be remapped within the new range thus allowing you to see more detail
in the image.
The default value for Shadow is 0. You can increase or decrease the
shadows in a particular image as needed by adjusting this scroll bar.
Scanning
