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Appendix: Useful Information on Scanning
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Resolution
Resolution
What is Resolution?
The data in the image you have scanned is a collection of dots carrying information about brightness and
color. The density of these dots is called "resolution", and resolution will determine the amount of detail
your image contains. The unit of resolution is dots per inch (dpi). Dpi is the number of dots per square
inch (2.54 cm square).
The higher the resolution (value), the more detail in your image; the lower the resolution (value), the less
detail.
Setting the Resolution in MP Navigator EX
In MP Navigator EX, you can specify the resolution with Scanning Resolution in the Scan Settings dialog
box.
Images for Printing
Images to be printed should be scanned at a resolution that corresponds to the resolution of the printer.
For example, if you want to print using a 600 dpi black and white printer, you should set the resolution to
600dpi.
With a color printer, specifying the resolution at half the resolution of the printer should be fine. For
example, if you want to print scanned paper/photos using a 600 dpi color printer, you should set the
resolution to 300dpi. However, with a high-resolution printer, printing takes longer than usual if you set
the resolution to half the resolution of the printer.
Example of Appropriate Resolution when Printing to Scale
If you print a document at twice the size both vertically and horizontally, the resolution of the document will
be reduced by half. If the resolution of the original document is 300 dpi, the resolution of the enlarged
document will be 150 dpi. If you print the document with a 600 dpi color printer, the lack of detail in the
image may be obvious. In that case, if you scan at the Scanning Resolution of 600 dpi, the resolution will
be 300 dpi even if you double the size of document and you can print the document with sufficient quality.
Conversely, if you print a document at half scale, it should be sufficient to scan at half the resolution.
When Printing Color Photos at Twice the Size
Document resolution: 300
dpi
Scanning resolution: 600
dpi
Scale: 200%
Print at twice the size
Scanning resolution/actual scanning
resolution: 600 dpi
Printing resolution: 300
dpi
Setting the Resolution in ScanGear (Scanner Driver)
In ScanGear (scanner driver), you can specify the resolution with Output Resolution in Output Settings on
the Advanced Mode tab.
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Resolution
Summary of Contents for 2921B002
Page 11: ...Page top Page 11 of 815 pages How to Navigate Menus on the LCD ...
Page 17: ...Page top Page 17 of 815 pages Printing Photos Saved on the Memory Card ...
Page 53: ...Page top Page 53 of 815 pages Printing Documents Macintosh ...
Page 66: ...Page top Page 66 of 815 pages Loading Paper ...
Page 91: ...Page top Page 91 of 815 pages When Printing Becomes Faint or Colors Are Incorrect ...
Page 94: ...Page top Page 94 of 815 pages Examining the Nozzle Check Pattern ...
Page 148: ...Page top Page 148 of 815 pages Selecting a Photo ...
Page 150: ...Page top Page 150 of 815 pages Editing ...
Page 152: ...Page top Page 152 of 815 pages Printing ...
Page 224: ...Page top Page 224 of 815 pages Attaching Comments to Photos ...
Page 228: ...See Help for details on each dialog box Page top Page 228 of 815 pages Setting Holidays ...
Page 266: ...Page top Page 266 of 815 pages Setting Paper Dimensions Custom Size ...
Page 279: ...Page top Page 279 of 815 pages Printing with ICC Profiles ...
Page 304: ...Page top Page 304 of 815 pages Printing Template Forms Such As Lined Paper or Graph Paper ...
Page 410: ...Printing Photos Sending via E mail Editing Files Page top Page 410 of 815 pages Saving ...
Page 492: ...installed Page top Page 492 of 815 pages Custom Dialog Box ...
Page 499: ...Page top Page 499 of 815 pages Scanner Button Settings Tab Save ...
Page 631: ...Page top Page 631 of 815 pages Printing with Computers ...
Page 664: ...Page top Page 664 of 815 pages If an Error Occurs ...
Page 751: ...Before Installing the MP Drivers Page top Page 751 of 815 pages Installing the MP Drivers ...