Adjusting the resolution – Visioneer OneTouch 7400 User Manual
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Resolution determines the amount of detail you can see in the scanned
image. The resolution setting for a scan is in dots-per-inch (dpi). The
higher the resolution, the finer the details, however, higher dpi settings
also take longer to scan and produce larger files sizes. Usually the higher
resolution settings are used for precision work, such as photographs or
fine artwork.
The following figure shows the resolution options.