Manually Optimizing Images - Epson Perfection 640U Reference Manual

Manually optimizing images

To optimize images manually, adjust the following EPSON
TWAIN settings in the order specified below:
Adjust the brightness and contrast
1. Adjust the Highlight and Shadow settings in the Image
Controls dialog box. See "Adjusting the Highlight Setting" on
page 2-10 and "Adjusting the Shadow Setting" on page 2-12.
2. Adjust the Gamma setting in the Image Controls dialog box.
See "Adjusting the Gamma Setting" on page 2-13.
3. Adjust the tone curve with a predefined tone correction
setting in the Tone Correction dialog box. See "Applying a
Preset Tone Curve" on page 2-14.
Make color adjustments
4. Adjust the Gray Balance Intensity setting in the Color
Adjustment dialog box. See "Adjusting the Gray Balance
Intensity Setting" on page 2-17.
5. Adjust the Saturation setting in the Color Adjustment dialog
box. See "Adjusting the Saturation Setting" on page 2-18.
6. Manually adjust the tone curve for individual colors in the
Tone Correction dialog box. See "Using the Tone Curve" on
page 2-18.
To make the following adjustments in EPSON TWAIN, you need
to display a preview image in the Preview window. See the
following section for details.
Scanning Basics
2-9