Scanning with XnView

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rondus18
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Scanning with XnView

Postby rondus18 » Tue Sep 22, 2009 8:46 pm

I scanned a book cover twice, once with XnView on my new laptop and again with HP Document Viewer on my old laptop using an HP scanner/printer. The scan I got using XnView was poor in quality compared to the scan using HP Document Viewer. I was wondering if there was any way to improve XnView's quality.
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xnview
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Re: Scanning with XnView

Postby xnview » Wed Sep 23, 2009 7:33 am

rondus18 wrote:I scanned a book cover twice, once with XnView on my new laptop and again with HP Document Viewer on my old laptop using an HP scanner/printer. The scan I got using XnView was poor in quality compared to the scan using HP Document Viewer. I was wondering if there was any way to improve XnView's quality.

How that "poor quality"??
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rondus18
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Re: Scanning with XnView

Postby rondus18 » Thu Sep 24, 2009 1:13 am

http://img8.imageshack.us/img8/7727/scancomapre.png

The XnView scan is too sharp and picks up too much white pixel noise.
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Re: Scanning with XnView

Postby xnview » Thu Sep 24, 2009 10:51 am

rondus18 wrote:http://img8.imageshack.us/img8/7727/scancomapre.png
The XnView scan is too sharp and picks up too much white pixel noise.

The picture is seen at 100%?
Pierre.

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rondus18
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Re: Scanning with XnView

Postby rondus18 » Thu Sep 24, 2009 4:03 pm

Yes.
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Re: Scanning with XnView

Postby xnview » Fri Sep 25, 2009 7:46 am

rondus18 wrote:Yes.

Strange, i don't know why. There is no change on the picture received from the TWAIN driver...
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Lux In Tenebris
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Re: Scanning with XnView

Postby Lux In Tenebris » Fri Sep 25, 2009 6:24 pm

Looks like a common moire pattern which is typical for most polygraphic imprints. HP's software could have some embedded functions for automatic image enhancement (e.g. descreen).

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helmut
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Re: Scanning with XnView

Postby helmut » Fri Sep 25, 2009 6:52 pm

Lux In Tenebris wrote:... HP's software could have some embedded functions for automatic image enhancement (e.g. descreen).

Yes, looks like some graphic manipulation in HP's software. When using XnView's Blur filter (Filter > Effects | Blur > Blur) one can get close(r) to HP's result.

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rondus18
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Re: Scanning with XnView

Postby rondus18 » Fri Sep 25, 2009 8:06 pm

So is HP compensating for a problem that XnView doesn't know how to handle, or has HP made it so their hardware works best with their software?

xnview wrote:There is no change on the picture received from the TWAIN driver...

Should I try a new driver for the printer or something?
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XnTriq
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Re: Scanning with XnView

Postby XnTriq » Fri Sep 25, 2009 9:00 pm

rondus18 wrote:So is HP compensating for a problem that XnView doesn't know how to handle, or has HP made it so their hardware works best with their software?

The Dust and Scratch Removal setting might be enabled in the HP software.

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Ty
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Re: Scanning with XnView

Postby Ty » Sat Sep 26, 2009 1:45 am

My understanding is that the TWAIN interface used by XnView and other imaging programs (to drive and control scanners and the scanning process) does not provide the same level of scanner control as does the scanner manufacturer's program. A scanner mfgr can make a new hardware-based feature, like spec/dust removal (which is a relatively new feature on many HP scanners), but that feature can only be activated by the mfgr's own software, because either (a) there is no TWAIN standard for this new feature, or (b) programs like XnView haven't yet implemented the TWAIN calls for the new feature. Keeping XnView (or any other TWAIN-based scanning program) up to date with all the latest developments in scanner technology is not, I believe, a very realistic objective.


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