HINT
zWhen "High Compression for Color PDF" is selected, characters and back- grounds on the document are compressed separately. In order to do this, the file size of the document that mostly consists of text characters becomes smaller while keeping the quality of the characters as they are. However, this mode is not appropriate for scanning photographs or pictures since these graphical materials are recognized as background and compressed as such, causing degradation in the scanned image. If this setting is specified, the con- trast of the image may become higher.
zIf "High Compression for Color PDF" is selected, according to the type of docu- ment, the file size may be larger than if a standard compression level is used. z Documents with many photographs or figures and only a few characters z Complex layout documents with multiple columns
z Documents which have a background pattern behind characters
zFor documents with many characters scanned at 300dpi resolution, a smaller file size than that of High Compression for Color PDF is possible.
zWhen one color page is scanned, the file size criteria are shown as follows. These numbers are for reference, other documents may vary in size. Actual paper size: A4 size (general catalog)
File format: PDF
Scanner paper size setting: A4 z File size (KB) for color files
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| High |
Resolution | Low | Medium | High | Compression | ||
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| High |
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150dpi | 406 | 232 | 197 | 153 | 94 | 158 |
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200dpi | 647 | 358 | 302 | 238 | 149 | 140 |
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300dpi | 1319 | 693 | 580 | 448 | 272 | 115 |
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600dpi | 3827 | 2034 | 1736 | 1377 | 854 | — |
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zFile size (KB) for grayscale files
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| Medium |
| Medium |
| High |
Resolution | Low | Medium | High | Compression | ||
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| Low |
| High |
| for Color PDF |
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150dpi | 380 | 233 | 186 | 153 | 85 | — |
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200dpi | 618 | 373 | 293 | 239 | 133 | — |
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300dpi | 1422 | 825 | 606 | 494 | 245 | — |
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600dpi | 3416 | 2147 | 1827 | 1338 | 720 | — |
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