Manual

VISIONEER ROADWARRIOR 3 SCANNER USER’S GUIDE
148
CLEAN UP EDGES
Select this option to remove any thin lines from around the edges of the final scan. This option will fill the margins
of the image with the detected edge color. When you select this option, the Width input field will automatically
enable for you to input the size of the area you want to have filled with the background color. You can specify a fill
size between approximately 0.04 to 0.39 inches (1 mm to 10 mm).
AUTOMATIC IMAGE CROPPING
Depending on the scanner model and installed software, there may be more than one auto cropping option in
the interface.
• Crop to original—select this option to let the scanner automatically determine the size of the item being
scanned. This option is only available if the scanner supports this feature. This option may occasionally be
grayed out as not all scanning applications support this feature.
• Crop to length—this option tells the scanner to crop the final image to the bottom of the page being
scanned. This option is only available if the scanner supports this feature. This option may occasionally be
grayed out as not all scanning applications support this feature.
COMPRESSION OPTIONS
There are two types of image compression functions used during scanning. The input compression option is
compressing the image when transferring it from the scanner to the TWAIN driver on the computer. The output
compression option is the TWAIN driver compressing the image before it sends the image to the scanning
application. In the scanning interface the input compression option is Compress transfers and the output option
is Compression.
Compress transfers
Select this option to have the scanner compress the image in Gray and Color scans. This reduces the file size and
allows for faster image transfer from the scanner to the computer. Once the compressed image is on the
computer, scanner’s driver will then uncompress the image, and perform any image processing functions that
have been selected in the scanning interface. The uncompressed image is then transferred to the scanning
application. With Compress transfers, a scanning application such as Nuance PDF Converter, will receive the
uncompressed image and save the image in whatever file format it uses. You can use the Quality slider to adjust
the level of compression you want to use.
When the Quality option is set to High quality, there is very little visual difference between a compressed scan
and an uncompressed scan. When the quality option is set to High compression, there may be a greater visual
difference between compressed and uncompressed scans.
Quality
You can fine tune the compression level by adjusting the quality slider between high compression and high
quality. When the quality level is set to high compression, the scanner will scan and transfer images faster than
high quality, but the image quality of the output scan will be lower.