Ricoh SAVIN A741, Руководство пользователя

Страница: 58 / 76

A741 50 Print Server Manual
13.8 Can we scan at a lower resolution to reduce the filesize?
The scanning option of A741 Repro has a fixed resolution of 400dpi, producing
high quality images.
There are 2 possibilities to reduce the filesize of the scanned image
•
By an external application
By using an external application -like Wang Imaging- it is possible to convert
the image from 400dpi to a lower resolution, hence reducing the filesize. A
side effect is that the resulting output file is of less quality then the original
size.
•
By scaling the image during scanning
During scanning, the scaling of the image is done by the A741 electronics.
Although the image size is reduced we still produce a very high quality output
file. In general, this quality is better then by using an external application to
reduce the image resolution.
The following table will link the resolution (in dpi) with scaling (in %). Both
settings will have approximately the same effect on the filesize:
Resolution Scaling
400dpi 100%
200dpi 50%
100dpi 25%
13.9 What is de-speckle?
Scanned images may contain 'noise', that is small black spots on the white
background or small white spots in black area's. De-speckling will remove these
spots as much as possible to improve the overall quality of the scanned image.
Many image handling software can provide this feature. The A741 Repro System
provides a basic De-Speckling function, both during printing and after scanning.
(see also 8.5)
13.10 What is de-skew?
When scanning an image, the sheet of paper may be slightly skewed. This image
skew is typically noticeable in horizontal and vertical lines. De-skewing will
slightly rotate the image again, so horizontal and vertical lines are really
horizontal or vertical again. Some software can automatically detect and correct
the amount of skew, in other programs you have to mark a known horizontal or
vertical line which will be used a s a reference for the de-skewing. The A741
Repro System provides basic De-Skewing after scanning. (see also 8.5)