e-STUDIO2330C/2820C/2830C/3520C/3530C/4520C © 2008 TOSHIBA TEC CORPORATION All rights reserved
5-2
(2) When scanning the original, press the [COMMON SETTING] button on the Control Panel. Select a higher
resolution in the resolution option.
* "200 (dpi)" is selected from among the resolution options by default. If noise occurs in a resolution of 200
dpi, select a higher resolution (300 dpi, 400 dpi or 600 dpi).
After changing the resolution, scan the original and check the scanned-in image quality.
If further image quality adjustments are still necessary, use procedure (1).
(3) 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
Precautions after the completion of the adjustment
• The adjustment of the compression rate or resolution may possibly increase the size of the file to be stored.
Therefore, carefully perform the adjustment, while checking the scanned-in image quality. The table below
shows you the correlation between a resolution 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.)
* The file size in a resolution of 200 dpi is 1.
Resolution File size ratio
200 dpi 1
300 dpi
Approx. × 2
400 dpi
Approx. × 3
600 dpi
Approx. × 8
• If the resolution selected in procedure (2) is too high, moiré may possibly occur in the scanned-in image.
Therefore, carefully adjust the resolution, while checking the scanned-in image.
Remarks
Use the following steps to change the default compression rate and resolution options:
(a) Press the [USER FUNCTIONS] button on the Control Panel to enter the "User Functions" menu.
(b) Press the [USER] tab.
(c) Press the [SCAN] button.
(d) In the " COMPRESS" or "RESOLUTION" option, press the button corresponding to the desired
compression rate or resolution option.
* The default resolution can be selected on a color mode basis: Full color mode (including the Auto color
mode), Gray scale mode and Black mode.
• The following resolution options are available as the default:
• Full color mode (including the Auto color mode): 600 / 400 / 300 / 200 / 150 / 100 (dpi)
• Gray scale mode: 600 / 400 / 300 / 200 / 150 / 100 (dpi)
• Black mode: 600 / 400 / 300 / 200 / 150 / 100 (dpi)
5. Scanning-specific Adjustments
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