Toshiba e-Studio Imaging 6520c - Manual (Page 275)

e-STUDIO5520C/6520C/6530C © 2008 TOSHIBA TEC CORPORATION All rights reserved
5-9
5. Scanning-specific Adjustments
(4) When scanning the original, press the [COMMON SETTING] button on the Control Panel. Press the
[BACKGROUND ADJUSTMENT] button. Press the [ ] button to decrease the background density. Then
select "HIGH" from among the compression rate options.
* This adjustment will be effective, only if the original with a color background, such as a newspaper and
color paper, is scanned.
* This adjustment will have an effect only on the image scanned in the Full color mode (including the Auto
color mode) or the Gray scale mode.
After decreasing the background density and changing the compression rate, scan the original and check the
scanned-in image quality.
With the background density set to the minimum, if further image quality adjustments are still necessary, use
other procedures.
(5) Enter the setting mode [08]. Change the value for the code [8304] to change the JPEG compression ratio.
Compression
ratio
[08] code Subcode
Recommended
value
Acceptable
range value
Default
High quality 0
Standard 1
Low quality
08-8304
2
Set a value smaller
than 128 for higher
compression ratio.
Set a value larger
than 128 for lower
compression ratio.
0 to 255 128
‰ Caution after the adjustment
• The table below shows you the correlation between the adjustment and file size. (The ratio of the file size may
vary, depending on the type of original. Therefore, use the table below just for your reference.)
• Correlation between the resolution and the file size (procedure (1))
* The file size in a resolution of 200 dpi is 100%.
Resolution File size ratio
200 dpi 100%
150 dpi Approx. 60%
100 dpi Approx. 30%
• Correlation between the original mode and the file size (procedure (2))
* The file size in the Photo mode is 100%.
Original mode File size ratio
Photo 100%
Text Approx. 20%
• Correlation between the compression rate and the file size (procedure (3))
* The file size is 100%, with [MID] selected.
Compression rate File size ratio
MID 100%
HIGH Approx. 80%