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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
Compression:
To complete your scan at a rated speed, the scanned image is compressed by
default during transmission. However, if you wish to obtain the highest image
quality, you can choose to uncompress the image data before it is outputted.
To Application:
Choose if you wish to compress the image data and transfer it from the TWAIN
driver to the application. Note 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 [Image Quality] slider to the right
or left to increase or decrease your image quality. Note the greater the image
quality, the lower the compression level. Default is 50%.
Scanned
Image
Scanned
Image
Scanner
Scanner Driver
Image Editing
Application
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