Theme: Scan button
Q:

CMYK inactive - why is it not possible to select "ScanCMYK" in my SilverFast?

A:

The most common reason for this is
- the host application does NOT support CMYK
- no CMYK separation tables were installed or selected in SilverFast's "CMS" dialog.


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Q:

Are the RGB or CMYK measure values (in the SilverFast interface) refer to the final scan data or to the preview data?

A:

The values displayed in the various SilverFast dialoges (for example the densitometer) allways refer to the data of the final scan result.


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Q:

Can I neutralize color casts with SilverFast?

A:

Yes, this is very simple. The SilverFast "auto correction" will automatically remove color casts in the scan unless the user prevents this manually either through the histogram dialog (slider for color cast removal) or through a setting in the "image type" selection box.
Color casts can be further de- or increased manually using the "global color correction tool" in SilverFast.


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Q:

How to batch scan, or: Why do I only get one image when I have several images on my film strip or loader?

A:

Three steps are needed to batch scan with SilverFast. 1st step:
In the SilverFast user interface - left hand side of preview-window - is a vertical row of command buttons. One of them is the film strip overview button. Click this to see a thumbnail overview of the current film strip. One of the thumbnails is highlighted (white frame). On your keyboard press and hold the "shift"-key and click with the mouse cursor on the last of the thumbnails. All thumbnails are now highlighted.

2nd step:
In the SilverFast user interface > SilverFast controls window (left of preview) select the "General" tab > Option "scan mode" and select "batch scan" or "batch scan(file)" to scan the images either into the application for visualizing or directly onto a storage media.

3rd step:
In the SilverFast user interface > SilverFast controls window (left of preview) select the "General" tab > option "original" and select "document feeder" here. The scan button at the bottom of the SilverFast controls window now changed its lable to "ScanBatch". Click "ScanBatch" and the entire film strip will be scanned.


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Q:

Error message(s) on pre-scan or scan:
"error in scan start, cannot calibrate scanner".
"error in scan start, cannot get parameter from scanner"
Cannot send Command "Set Window"

A:

remedy
make sure the original inside the scanner does NOT cover an existing "calibration-line" on the scan bed.
If this is not the case, most of the time it may help pressing the pre-scan rsp. scan button again.
If this does not cure the problem, and you work on a flatbed scanner with integrated/optional transparency unit, try this:
switch to the other mode, do a prescan there and than switch back to your mode.
If problem persists, read the FAQ in this subsection related to "Prescan Button"


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Q:

Horizontal lines in final scan on Macintosh. Occurs only when SF has a calibration profile selected in SilverFast's CMS dialog.

A:

cause:
when in Macintosh ColorSync calibration profiles for input (scanner) and for output (monitor) are preselected, and at the same time SilverFast is set to work with a profile - either SilverFast's own calibration input profile or a ColorSync profile - the calculation for output levels was allocated wrongly. So with RGB scans the output was considered CMYK (4 levels instead onf 3), and vice versa. This leads to horizontal lines in the final scan. solution: this bug is fixed in SF v.5.2.1


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Q:

regular pattern visible
When scanning from photos or even film material (transparency) sometimes the scan result shows a regular pattern all over the image - this can't be a moiré pattern, can it?

A:

This pattern is often due to calculation algorithms in the software (problems with high frequencies in image).
Workaround 1: set SilverFast's interpolation algorithm to "Anti Aliased" (Option > General)
Workaround 2: only use optical scan resolutions. Set the "dpi"-slider in SilverFast to your desired resolution and click into the "dpi"-box at the right end of this slider. Now press the CTRL key on your keyboard and SilverFast displays the nearest optical scan resolution supported by your scanner. If the value in the entry box does not change, you selected a true optical resolution.
If the value changes, however, we recommend to release the CTRL button and set the value in that box to the value you saw when the CTRL button was pressed, thus using the nearest possible scan resolution for your scan.


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Q:

I got a bad scan result with black/white films of ASA speed 400 and higher.

A:

- scan image with SilverFast as raw data file (16bitHDRgreyscale) at full optical resolution.
- load file into host application.
- (if negative: convert after scan)
- apply a tonal correction (levels) to your image.
- convert to 8bit image
- downscale to desired resolution.


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Q:

Final scan does not correspond to prescan in SilverFast, what is wrong?

A:

With RGB scans, make sure that the values for "Gamma correction" correspond in SilverFast (Option > General dialog) and Photoshop (color settings dialog). Please make also sure that your RGB colour space profile chosen in SilverFast (Options > CMS dialog > internal) corresponds to the RGB working colour space profile selected in Photoshop.
With CMYK scans, make sure you selected the same CMYK separation table in Photoshop AND in SilverFast.


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Q:

What is meant by "raw data matching in SilverFast versions (SE and Ai)"?

A:

SilverFast calculates on highest possible bit depth even when output is the usual 8bit format.

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