User’s Manual
4-29
4.4
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 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:
None
JPEG
For scanning B&W images, the following compressions are
available:
None
G4
Summary of Contents for BS-2102B
Page 1: ...Flatbed Scanner User s Manual Regulatory model BS 2102B Avision Inc ...
Page 25: ...User s Manual 4 5 ...
Page 34: ...User s Manual 4 14 Error Diffusion Image Dynamic Threshold Dynamic Threshold AD ...
Page 37: ...User s Manual 4 17 Normal Photo Document Threshold 230 Normal Photo Document Threshold 230 ...
Page 40: ...User s Manual 4 20 Resolution 75 dpi Resolution 150 dpi ...
Page 51: ...User s Manual 4 31 The Compression tab dialog box ...
Page 55: ...User s Manual 4 35 The Color Dropout dialog box ...