Using Auto Balance - Canon MultiPASS C635 User Manual

As you move right and left, the gamma increases or decreases in
value. The tone curve is automatically modified as you adjust the
gamma.
As you drag, a gamma value will appear in the upper left corner of
the tone curve. With each modification of the tone curve or gamma,
the adjusted representation of your image will be updated to reflect
the changes.
Resetting the Tone Curve
To reset a tone curve, select a curve and click the Reset button.
Adjusting the Tint
The Tint Adjustment tool allows you to adjust the color cast of your
image in much the same way you would adjust the color on a television
set.
Drag the sliders to the left to decrease or the right to increase the
Red, Green, or Blue tint of your image. The numeric values to the
right reflect the position of the slider.

Using Auto Balance

The Auto Balance function alters the tonal balance of the image by
stretching the contrast, or dynamic range, of each color channel between
the whitest and blackest point of your image or selected area. Because all
scanners compress image data, images have less dynamic range between
light and dark (blacks are not as black as they should be and whites are
not so white). The auto balance function attempts to adjust the contrast
of the image to its best potential.
The automatic functions are:
The Entire Image button is designed to balance the image based on
the entire visible preview. This is a very rapid method for image
balance.
The Current Selection button bases the balance factor for the entire
image on the area you have selected with the Selection Rectangle.
Chapter 6 Scanning With the MultiPASS C5500 6-17