Determining Resolution - Canon Color imageCLASS 8180c Software Manual

[Test Scanner...] Checks the power cord plugged in, or the USB cable is connected

Determining Resolution

3
You can specify a resolution in [Image Quality] in the MF Toolbox settings dialog
box, or in [Output Resolution] in ScanGear MF.
NOTE
•
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 "dpi" (dots per
inch) refers to the number of dots in one inch. Resolution will determine the amount of
detail your image contains. The higher the resolution (number), the more detail in your
image; the lower the resolution (number), the less detail.
•
As a general rule, you should select a scanning resolution that corresponds to your final
output device such as a monitor or printer.
■ Images for Display on a Monitor
Images for display on a monitor should in general be scanned at a resolution of 75 dpi.
■ Images for Printing
Images to be printed should be scanned at a resolution which corresponds to the
resolution of the printer. For example, if you are using a 600 dpi black and white printer,
you should scan your document at [600 dpi].
NOTE
With a color printer, the colors are expressed as a certain percentage of ink pigment so
scanning your document at half the resolution of the printer should be fine. For example,
if you are using a 600 dpi color printer, you should scan your document at [300 dpi].
■ Printing to Scale
For example, if you want to print a document which is twice the size both vertically and
horizontally, the resolution of your 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 such a case, if you scan at a resolution of 600 dpi, resolution will be 300 dpi
even if you double the size of the document and you can print the document with sufficient
quality. Conversely, if you want to print a document at a reduced size, it should be
sufficient to scan at half the resolution.
3-42 Setting Preferences and Scanning with ScanGear MF
[Play Sound When Scanning is Completed]
If selected, the scanner plays sound when scanning is completed.
Click [Browse], then specify a sound file.
You can specify the files below.
•
MIDI files (*.mid, *.rmi, *.midi)
•
Audio files (*.wav, *.aiff)
•
MP3 file (*.mp3)
between the machine and your computer.