jpeg 2000 option creates faulty pics

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curious
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Posts: 1
Joined: Tue Mar 20, 2007 12:34 pm

jpeg 2000 option creates faulty pics

Postby curious » Tue Mar 20, 2007 6:43 pm

Hi *,

I noticed some strange behavior while scanning with a Nikon Super Cool Scan scanner and SilverFast. In order to get the most info I scanned with
16 bits per channel and set file output to jpeg2000 and "100% quality". This seemed to be a good compromise in file size between lossless and smaller jpg-files.

Unfortunately, after a while the jpeg2000 converter (?) seems to introduce errors and writes faulty picture info to the file. The first half (or
two thirds) of the bottom of the scanned image are fine. The last part is a combination of very blurred to blurred areas making up the image.

Since I have already scanned in a lot of pictures I am "not amused".

Here the pic of the downstripped selection of the original picture converted to 8 bits per channel and saved in jpg to save bandwith.

Image

Nikon Scan does not show this effect. But then, it can't save jpf-files.

Any hints as to what causes the problem ?
Any workarounds to save the images other than rescanning the whole lot?
Might this be an encoding kind of problem such that the "real" info is
present in the file but the viewers (photoshop, ImageMagick, ...) just can't read the file correctly.

Thanks
Curious

LSI_Sperling
LSI Staff
LSI Staff
Posts: 90
Joined: Thu Dec 20, 2001 1:00 am

Postby LSI_Sperling » Mon Apr 02, 2007 9:41 am

Dear Mr. Curious

we like to check and fix this.

please use our support form and we will look after ist as quick as possible.


http://www.silverfast.de/problemreport/ ... opic=Usage


Please delete the Lasersoft Imaging folder - while SilverFast isn?t running

On a typical Windows XP installation, the " Lasersoft Imaging " folder is to be found at:

C: \ Documents and Settings \ (your username) \ Application Data \ Lasersoft Imaging


If you haven't yet changed the standard setting of the Windows Explorer you won't see any folder "Application Data". You then want to open the folder options dialogue (from "Extras" the menu) and go to the "View" tab. There you can enable the Explorer to show you hidden and system files and folders as well as displaying the contents of system folders.

Please test now, if the error still exsist. If there is still any problem, please send me an exact step-by-step report how do you reproduce the problem. I need this report, because we can solve the problem only if I can reproduce it. In this case I also need the "SF-LogFile " - please send it to me. You find this also at: C: \ Documents and Settings \ (your username) \ Application Data \ Lasersoft Imaging \

Thanks in advance for your co-operation

LSI_Luebker
SilverFast Master
SilverFast Master
Posts: 591
Joined: Mon May 07, 2007 9:43 am

Postby LSI_Luebker » Tue May 08, 2007 10:42 am

the problem has been fixed in SilverFast 6.5 :P

regards,

Thomas Luebker


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