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On-line graphics: If you are scanning an image to be used orim-line, such as the Internet, a BBS or in a multimedia presentation, you ne,odn’t scan any higher than 100 dpi. This is because a monitor’s resolution is either 72 dpi (Mac), or 96 or 120 dpi (PC), and is not capable of displaying a higher resolution. Images scanned at 300 dpi and viewed on a monitor will appear three times as large as the actual image. This enlargement results because your monitor displays images in a 1: 1 ratio of pixels (or dots), meaning one dot in the image equals one dot on-screen. At 300 dpi, the image contains 3 times as many dots when displayed on the monitor.

Faxing images: Any image you intend to fax from a PC-based fax modem should be scanned at 200 dpi. Fax machines only receive images at 200 dpi, and some programs may fault if you try to scan at higher resolutions.

Printed images: If you plan to print the images you scan, use the following table to select a resolution when scanning in color and gray scale. As a general rule, scan at twice the Line Screen Frequency of the output device. This information can be found in your printer’s manual. When scanning in line art mode, scan at the resolution of your printer, usually 300 or 600 dpi. This avoids sizing distortions in your printed images.

Output Device

Line Screen

Scanning

Resolutions

 

 

Frequencies Line Art

Color

Laser Printer (300 dpi)50

300

120

 

Laser Printer (600dpi) 85

600

170

 

Laser Printer (1200 dpi)105

1200

210

 

Imagesetter

133

 

2400

266

Color DySub Printervaries

match

2x line screen

Scaling

Use the checkbox to toggle between proportional (set width and height individually) and integrated (set width and height together) scaling. Enter a percentage in the text box or use the slider bar to change the scaling values.

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Image 15
IBM Ricoh 2400 dpi manual