Resolution

    10-Jun-2008
    8200172400

    Solution

    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, you can specify the resolution with Output Resolution in Output Settings on the Advanced Mode tab.

    • Example of Appropriate Resolution when Printing to Scale
    The scanning resolution is automatically set so that the value set in Output Resolution will be the resolution of the scanned image. If you set Output Resolution to 300 dpi and scan at twice the size, the document will be automatically scanned at 600 dpi, and the resolution of the scanned image will be 300 dpi. You can print the document with sufficient quality using a 600 dpi color printer.

    When Printing L Size (8.9 cm x 12.7 cm) Photos at Twice the Size
    Document resolution: 300 dpi
    Output resolution: 300 dpi
    Scale: 200%
    Scan at twice the size
    Actual scanning resolution: 600 dpi
    Image resolution/printing resolution: 300 dpi

    Appropriate Resolution Settings
    Set the resolution according to the use of the scanned image.
    For displaying on a monitor: 150 dpi
    For printing: 300 dpi
    When Output Size is set to Flexible in ScanGear's Advanced Mode (Select Source is Platen and the scale is 100%):
    DocumentUseColor ModeOutput
    Resolution
    Color photoCopying(Printing)Color300 dpi
    Creating a postcardColor300 dpi
    Saving to a computerColor75 dpi - 300 dpi
    Using on a website or attaching
    to e-mail
    Color75 dpi - 150 dpi
    Black and white
    photo
    Saving to a computerGrayscale75 dpi - 300 dpi
    Using on a website or attaching
    to e-mail
    Grayscale75 dpi - 300 dpi
    Text documentCopyingColor, Grayscale or Black
    and White
    300 dpi
    Attaching to e-mailColor, Grayscale or Black
    and White
    300 dpi

    REFERENCE
    • Although you can change Output Resolution in ScanGear (scanner driver), it is recommended that you scan at the default value.
    • If you double the resolution, the file size quadruples. If the file is too large, the processing speed will slow down significantly, and you will experience inconvenience such as lack of memory. Set the minimum required resolution according to the use of the image.