Epson Perfection 640U Series, Справочное руководство

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Understanding EPSON TWAIN Features
3-13
Tone Curve Name list:
Select a tone correction setting from this list. The custom settings
you have saved appear in this list.
Tone Curve editor:
The editor allows you to customize tone correction. Drag points
on the tone curve to adjust the tone value. You can edit up to five
tonal elements.
Output options:
If you select the check box for a specific point, such as 1/4 Tone
or Midtone, you can move that point and it remains where you
leave it; it is not affected by the movement of other points on the
curve. If the check box is cleared, the point becomes affected by
the movement of other points.
Channels options:
You can select the combined red, green, and blue (RGB) channel
to modify all colors, or select these colors separately.
Note:
If Image Type is set to Black & White Photo or Black & White
Document , you can only select the combined RGB channel option.
Save/Delete/OK/Cancel/Help buttons:
After you correct tone, type a name for your custom settings in
the Tone Curve Name list, and then click
Save .
To delete a setting, select the name of the setting you want from
the Tone Curve Name list, and then click
Delete .
To accept the defining Tone Correction or close the dialog box,
click
OK .
To cancel the operation, click Cancel .