Canon CanoScan FB 1200S User Guide - Page 52

How the Input Resolution, Image Size and File Size Relate

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How the Input Resolution, Image Size and File Size Relate To understand the relationship between the three settings, see the example below of an image scanned in the file mode at different input resolutions. Example with the Input Resolution Changed to 600 Input Resolution (dpi) 300 600 Output Resolution (dpi) 300 300 Image Size (pixels) 300 x 200 600 x 400 Image Size (cm) 2.54 x 1.69 5.08 x 3.38 File Size (KB) 180 720 * These numbers are approximate and may differ from actual results. Example with the Input Resolution Changed from 300 to 600 dpi An input resolution of 600 dpi signifies that one linear inch of the scanned image contains 600 dots (= pixels). Since the number of dots has been increased (doubled in this case), the image size (pixels) has increased (doubled) by a corresponding amount. 300 dpi 600 dpi 1 dot Scanned at 300 dots per inch Scanned at 600 dots per inch Since the width and height were each doubled, the file size is quadrupled. When you wish to save a scanned image to a file, it is helpful to keep this relationship in mind. In this case, there is no need to pay attention to the output resolution. 52 FilmGet FAU User's Guide

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52
FilmGet FAU User’s Guide
How the Input Resolution, Image Size and File Size Relate
To understand the relationship between the three settings, see
the example below of an image scanned in the file mode at
different input resolutions.
* These numbers are approximate and may differ from actual results.
Example with the Input Resolution Changed from 300 to 600 dpi
An input resolution of 600 dpi signifies that one linear inch of the
scanned image contains 600 dots (= pixels). Since the number of
dots has been increased (doubled in this case), the image size
(pixels) has increased (doubled) by a corresponding amount.
Since the width and height were each doubled, the file size is
quadrupled.
When you wish to save a scanned image to a file, it is helpful to
keep this relationship in mind. In this case, there is no need to pay
attention to the output resolution.
Example with the
Input Resolution
Changed to 600
600
300
600 x 400
5.08 x 3.38
720
Input Resolution (dpi)
300
Output Resolution (dpi)
300
Image Size (pixels)
300 x 200
Image Size (cm)
2.54 x 1.69
File Size (KB)
180
300 dpi
Scanned at 300
dots per inch
600 dpi
Scanned at
600 dots per inch
1 dot