User`s guide

5-43Reference

White / Black Points

The histogram located in the White & Black points screen shows the total distribution of color data

before user corrections are applied. This tool lets you adjust the white and black point of the

scanned image. The white / black point controls which color value of the image to be scanned

appears as absolute white / black in the output image. Other color values are adjusted in a similar

manner.

For example, moving the black point indicator to the right in an image which contains very little

shadow data will allow more contrast in the highlight area of the image. Conversely, moving the

white point indicator to the left (to lower color values) in an image with very little highlight data

will allow more contrast in the shadow area of the image. This tool can be used either on all colors

at once or on individual color channels.

The White/Black Points screen is available for all color images types and grayscale images. The

channels are RGB or Gray.