Canon MF4200 User Manual download pdf (Page 53)

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2-39

Introduction

Scanning a

Document

Troubleshooting

Appendix

Table of Contents

Index

■ Determining Resolution

The data in the image you scan 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.

You can specify a resolution in [Image Quality] in the MF

Toolbox settings dialog box, or in [Output Resolution] in the

ScanGear MF.

● Images for Display on a Monitor

Images for display on a monitor in general should 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.

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.

● Printing Scale

For example, if you want to print a document which is twice the

original size both vertically and horizontally, the resolution of

your document will be reduced by half. In such a case, scan the

original document at double the resolution so that you can print

the document with sufficient quality, even if you double the size

of the document. Conversely, if you want to print a document at

a reduced size, it should be sufficient to scan at half the

resolution.

● Resolution and Data Size

If you double the resolution, the image data will be four times

greater. If the data is too large, processing speed will slow down

significantly, and you may experience malfunctions such as lack

of memory. Make sure the resolution corresponds to the

planned use of the image and set it at the lowest level possible.

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Canon MF4200 User Manual Page 53

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