Canon Color imageCLASS 8180c imageCLASS MF8180c Software Guide - Page 149
Determining Resolution, Images for Display on a Monitor, Images for Printing, Printing to Scale
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Scanning [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) [Test Scanner...] Checks the power cord plugged in, or the USB cable is connected between the machine and your computer. 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