Ricoh A741 manual Can we scan at a lower resolution to reduce the filesize?, What is de-speckle?

13.8Can 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%

13.9What 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)

13.10What 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)

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