Avision av121b Benutzerhandbuch

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 the compression depends on your image editing 
application.  If your image editing application does not support 
the type of compression format, then either a warning message 
will appear or the image quality of the compressed file will not 
be acceptable.  

 

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: 

y 

None 

y 

JPEG 

 

For scanning B&W images, the following compressions are 

available: 

y 

None  

y 

G4 

 

 
 

 

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