The Memorex unit turned in the lowest image quality scores with poorly defined and dark images. The automatic controls for color, brightness and contrast only made things worse. Another mark against the Memorex is slowness. Visioneer Inc.'s PaperPort 3100USB was a racehorse. Images became 80M files in a minute and a half.
Image quality is about average.
The 3100USB stays true to original colors. Zooming into the scanned images, however, we saw its limits. The 3100USB is best suited for scanning documents and low-resolution Web graphics. The bundled PaperPort software also provides a headache-free document management and scanning interface. Visioneer's PaperPort 6100B, the 3100USB's big brother, shares many of its advantages and flaws.