- This topic has 3 replies, 4 voices, and was last updated 9 years ago by .
-
Posts
-
Hi,
I am experiencing some problems with Asprise JTwain v9 Eval and the Kodak i40 scanner.
We are trying to switch to JTwain because our current library (Morena) does not work under Citrix.
So I tested JTwain, and basically it works. However, when I scan using the Kodak i40 I get distorted images.
When I put 8 sheets into the ADF, then 2-3 images of 8 are distorted.
Using grayscale, 150 dpi on Java 1.4.2_17.With our previous library there were no such problems.
So … what do I do? Asprise does not answer my emails. And we will not buy before I am sure that everything works.
Sascha
We also used the evaluation version of JTwain.
It is not a hardware specific problem.
We were using it with Canon DR-2010C scanner.It does it because it is an evaluation version.
If you buy the software you will have no problems…Just an announcement regarding the Citrix:
Morena was tested against Citrix Presentation Server version 4.5 and 5.0. It works fine (with Citrix XenApp Client version 11.0.0.5357)Martin Motovsky
Member of Morena’s technical supportThe Asprise TWAIN library has the following problem:
For black&white and grey scans (i.e. all but color), each line is shifted the same amount against the last, resulting in images looking tilted, and sometimes even in a crash of the Java virtual machine. It happens not always, but apparently depending in the # of pixels per line.
The cause is probably that the # of bytes per line is not padded correctly to get a multiple of 4, which is required for Windows bitmaps.
RGB Color scans have 4 bytes/pixel, so there is no problem with these.
Workaround: Turn automatic border detection off and, for fixed paper size, try out slightly different resolutions until the image looks right. Then, with these parameters, it always does.
With Fujitsu scanners we never experienced the problem, they seem to always produce lines with a multiple of 4 bytes, even in black&white and grey.
I kept asking Asprise to fix this problem, with no avail.
We finally changed our TWAIN library to Gnome Morena.