e-STUDIO2500c/3500c/3510c
(4) When scanning the original, press the [EDIT] button on the Control Panel. Press the [BACKGROUND
ADJUSTMENT] button. Press the [ ] button to decrease the background density. Then select "HIGH"
from among the JPEG 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.
Precautions after the completion of 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 JPEG compression rate and the file size (procedure (3))
* The file size is 100%, with [MID] selected.
JPEG compression rate
File size ratio
MID 100%
HIGH Approx. 80%
• The adjustment may possibly diminish the image quality, as shown by the table below. Therefore, carefully
perform the adjustment, while checking the scanned-in image.
Procedures used Possible image degradation
Any of procedures from (1) to (4) The photo image area may be blurred.
(1) or (3) Noise may be increase around text.
(1) or (3) Small-sized text may become illegible.
(4) Light-colored images may not be clearly scanned.
5. Scanning-specific Adjustments
5.4
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