Plustek Opticpro A320E Flatbed Scanner - Manual (Page 47)

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the drop-down menu:
· Custom -- Use this setting to process the scanned document when other
image enhancement functions are adjusted. This option allows you to
customize the image setting parameters for your current needs. If you select
this option and don't modify any image setting, the previous image settings
will be applied.
· Default -- Use this setting to process the scanned document by the default
values.
· Photo -- Use this setting to process the document contains mostly
photographs. This feature is not available when Black & White is selected as
Scan Mode .
· Photo & Text -- Use this setting to process the document contains a mix of
graphics and texts.
· Text -- Use this setting to process the document contains mostly texts. This
setting is available only when Black & White is selected as Scan Mode.
2.2.1.6 Resolution
Resolution is measured in dots per inch (dpi). The higher the resolution, the
more detailed the image and the more memory and drive space the image will
use.
To conserve computer memory and still receive good image quality, we
recommend the following settings.
Document to be scanned Resolution (dpi)
Text (for printing) 300
Text (for faxing) 200
Text (for OCR) 300
Black and white or gray image 150
Color image or photo 100