Auto Exposure - Epson Perfection 640U Reference Manual
Color image scanner
Hide thumbs
Also See for Perfection 640U:
- Scanner basics (71 pages) ,
- Service manual (53 pages) ,
- Product support bulletin (31 pages)
Table of Contents
Advertisement
Click the eyedropper button beneath the slider. The mouse
pointer changes to an eyedropper. Then click the color you want
to represent gray. The eyedropper "picks up" the color and
displays it in the box beside the eyedropper button. You can then
correct the cast level for that color from 0 to 100 by moving the
slider. The corrected color appears in the box on the right, and the
effect shows up immediately in the preview image. Click Cancel
to restore the original image.
Saturation:
Saturation is the property that defines color depth. Select a
saturation level from -100 (less color) to 100 (more color) by
moving the slider.
Auto Exposure
Click the Auto Exposure button on the Manual mode window to
automatically optimize the exposure for an image. The Gamma,
Highlight, and Shadow settings in the Image Controls dialog box
are automatically set.
Note:
❏ The Auto Exposure button appears dimmed and is not available
when Image Type is set to Text/Line Art , or when ICM or
ColorSync is selected in the Configuration dialog box and when
there is no preview image.
❏ The Auto Exposure feature is automatically activated when
scanning without previewing.
Understanding EPSON TWAIN Features
3-15
Advertisement
Table of Contents
