Using Tone Curves - Canon MultiPASS L6000 Software Manual

When you find a combination of tone settings you like, you can save the
settings in a file and use it in future scanning sessions.
To adjust the tones using the Histogram tool:
1. On the Tone tab, click the Histogram tool button.
2. For the black-point, midpoint, or white-point, do one of the following
to make a change:
In the preview image, all tones are adjusted accordingly.
3. To reset to the default values, click Reset.
To save these settings to use on similar images, click Save. In the Save
As dialog box, specify the file name and location where you want to
save the setting, and click Save.

Using Tone Curves

You can use predefined tone curves to automatically correct the most
common problems with images: overexposure, underexposure, or too
high or too low a contrast.
You can also manipulate a curve in the Special Tone Curve graph to
create your own tone curve.
To correct an image problem with predefined tone curves:
1. On the Tone tab, click the Special Tone Curves button.
6-22 Scanning
Click the appropriately labeled button. Then click on the portion
of the image in the preview area that is darkest (for black-point),
lightest (for white-point), or in the middle of the tonal range (for
midpoint). Try zooming in on the specific part of the image so
you can be sure you are selecting the shade you want.
In the appropriately labeled box, enter a tone value.
Drag the appropriate arrow at the bottom of the histogram to the
level you want.
Chapter 6