Fujitsu PA03360-B525 Operator's Manual page 192

3. Click the [OK] button to close the dialog box.
Operation
4. Load the document onto the ScanSnap.
5. Press the [SCAN] button
⇒
Scanned documents will be output as highly compressed color images.
ATTENTION
174
.
In "Color high compression" mode, characters and background on the
document are compressed separately, and thus, the file size of the document
that mostly contains text characters becomes smaller while the quality of the
characters is kept high. However, this mode is not appropriate for scanning
photographs or figures because these graphical materials are recognized as
background and compressed as such, causing degradation in images. If this
setting is specified, the contrast of the image may become higher.