IBM Oce TDS800 - Manual (Page 77)

Using the Océ TDS800 to scan-to-file 77
Note: Only choose ‘Group 4’ or ‘Group 3-1D’ when you are sure you can use
these compressions afterwards. Choose ‘None’ in any other case.
Note: If you scan greyscales or dark originals then use Group 3-1D
compression. In these cases group 4 can increase the file size.
Note: ‘Group 4’ or ‘Group 3-1D’ are compression methods which are
optimized for text and vector drawings. If you choose these compressions when
scanning a photo with many greyscales these compressions can result in a
negative compression: the file size increases instead of decreases. So use these
compressions with care.
PDF compress
Within the ‘PDF compress’ option, you can define the ‘Compression’ of the
file.
Compression can be (select with the arrow keys):
■
Group 4
■ None
Note: Only choose ‘Group 4’ when you are sure you can use this compression
afterwards. Choose ‘None’ in any other case.
Resolution
The Océ TDS800 scan-to-file option allows you to scan at the following three
resolutions:
■ 200 dots per inch (dpi)
■ 300 dpi
■ 400 dpi
The higher the resolution the better the image quality. Higher resolution also
leads to larger file sizes. The default value is 200 dpi.