Fujitsu ScanSnap S500 Operator's Manual page 94

HINT
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About the size of image data
The following table shows a rough guideline for calculating the size of
images when a single color document is scanned in the Simplex mode.
File type: PDF
Paper size: A4 (Brochure)
Color mode: Color
Scan mode
Normal quality
Better quality
Best quality
Excellent quality
Color mode: Color high compression
Scan mode
Normal quality
Better quality
Best quality
Excellent quality
Color mode: B&W
Scan mode
Normal quality
Better quality
Best quality
Excellent quality
* "Color high compression" is effective in "Best quality" or "Excellent quality"
mode.
* For more efficient use, adjust Compression rate and/or select
"Color high compression" mode as follows:
-Setting Compression rate (1 to 5) reduces the file size when scanning
documents such as photographs or figures.
-Selecting "Color high compression" reduces the file size even more when
scanning documents including many characters (at Best/Excellent).
Compression rate
1 2 3
743 312 256
1169 548 395
2503 1018 790
10210 4084 2884
Compression rate
1 2 3
524 329
787 459
1107 572
1560 724
Compression rate
135
221
485
1681
4 5
178 100
300 186
575 352
1981 1793
4 5
270 180 159
393 137 97
238 176 147
574 475 380
(unit: Kbytes)