iVina BulletScan S300, User Manual

Page: 53 / 108

S300 Manual V.5 Aug 2010 4-23
4.3 The Compression Tab
The Compression tab allows you to compress your scanned
image and choose the level of compression. Bi-tonal images
are normally compressed using CCITT standard called Group 4
(G4). Color and grayscale images are often compressed using
JPEG technology. Move the
JPEG Quality slider to the right or
left to increase or decrease the level of compression. Note the
greater the compression level, the lower image quality. Default
is 50%.
Note that when scanning from certain applications, not all
compression modes are supported. If the application does not
support the type of compression format, typically you will see
an error or a black image.
JPEG (Joint Photographic Editor Group). This group developed
and lent their name to a file compression standard for color and
grayscale images that is widely used by scanners, and software
applications. On Microsoft Windows-based systems, a file with
the extension .jpg has normally been compressed using this
standard.
For scanning color or gray images, the following compressions
are available:

None

JPEG
For scanning B&W images, the following compressions are
available:

None

G4