Epson Perfection V500 - Manual (Page 213)

You Cannot Scan Using the Thumbnail Preview
Epson Scan may not be able to detect certain types of images, or may crop or group
the images unexpectedly. This may happen if you scan the following items:
Images with a dark background
Images with a very bright background
Color negative film with extremely light or dark base color (background)
Panorama and regular size images being scanned at the same time
Try one or more of the following solutions.
For documents or photos:
Make sure the documents or photos are placed on the scanner’s document
table correctly. See Placing Documents or Photos for instructions.
Use normal preview (if available) and create marquees on the areas you want
to scan. See Previewing and Adjusting the Scan Area for instructions.
For film or slides:
Make sure the film or slides are placed in the film holder correctly and the film
holder is properly positioned on the document table. See Placing Film or
Slides for instructions.
In the Configuration window, adjust the thumbnail cropping area using the
Thumbnail Cropping Area slider. See Epson Scan Help for details.
Make sure the document mat is removed when you scan film or slides. See
Removing the Document Mat for instructions.
Make sure the Document Type setting (Home Mode) or Document Type and
Film Type settings (Professional Mode) are set correctly for your film/slide
type. See Selecting Basic Settings for instructions.
Use normal preview (if available) and create marquees on the areas you want
to scan. See Previewing and Adjusting the Scan Area for instructions.
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Scanning Takes a Long Time
If you are scanning film or slides, or using the scanner’s Digital ICE
Technology feature, scanning takes longer than usual.
Computers with USB 2.0 (high speed) ports can transfer data faster than
those with USB 1.1 ports. Therefore, the scanning time may be shorter if you
use a computer with a USB 2.0 port. If you are using a USB 2.0 port with your
scanner, make sure it meets the system requirements. See System
Requirements for details.
Try scanning your original at a lower Resolution setting to speed up scanning.
See Selecting the Scan Resolution for documents and photos, or Selecting the
Scan Resolution for film and slides.