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#1 Posted : Tuesday, May 6, 2008 10:41:41 AM(UTC)
Vasu Ram

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Hello,

I understand how the actual blank page detection process works( using raster image apis) but how can I store the blank page detection preference within the twain session ?. I want to build a settings screen where user will have the option of turning on/off the blank page detection preference.
If the preference is on, every image will then pass through a blank page test.If not, even blank images will be retrieved/displayed.

Thanks
Vasu
 

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#2 Posted : Wednesday, May 7, 2008 3:08:50 AM(UTC)

Qasem Lubani  
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Vasu,


Do you
mean you want to store an additional flag for page detection into the Twain template saved by LEADTOOLS Twain template functions?


If yes,
the template save and load functions only save the Twain driver's capability
values, and do not allow adding other data there, such as your own flag that determines whether to turn on or off your own blank page detection code.


 


If you want to save such settings, you must use your own file to store them.
 
#3 Posted : Wednesday, May 7, 2008 5:53:56 AM(UTC)
Vasu Ram

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Thanks.

But, is there a twain capability for blank page detection preference - like there are ones available for duplex setting, rotation angle etc ?.
 
#4 Posted : Thursday, May 8, 2008 5:01:33 AM(UTC)

Qasem Lubani  
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You can do that by setting the ICAP_AUTODISCARDBLANKPAGES. However, this depends on whether the scanner driver supports the capability or not. More information on the capability is available in the Twain Standard document.
 
#5 Posted : Monday, May 12, 2008 6:47:07 AM(UTC)
Vasu Ram

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Doesn't LeadTools provide a blank page detection preference ?
My code is in C#. Can you point me to some sample C# code that interfaces with ICAP capabilties ?

Thanks.
 
#6 Posted : Monday, May 12, 2008 8:38:15 AM(UTC)
Vasu Ram

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It further seems that the ICAP_AUTODISCARDBLANKPAGES setting is not listed as a TwainCapabilityType in Leadtools.
 
#7 Posted : Tuesday, May 13, 2008 5:57:05 AM(UTC)

Qasem Lubani  
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This capability was removed from the Twain standard header file in version 1.9.


However, if your driver supports it, it will probably be listed as a custom capability with number (1134)hex = (4404)decimal
 
#8 Posted : Sunday, January 18, 2009 11:12:35 PM(UTC)

delemed  
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How do I work with this custom capabilities? My scanner supports this feature and I would like to handle this with the Leadtools twain session.
Can you maybe give me some sample code for setting up this custom capability?

Thanks a lot!
 
#9 Posted : Monday, January 19, 2009 1:04:26 AM(UTC)

Adnan Ismail  
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Can you tell me which version of LEADTOOLS (v14,v15, v16, etc) are you using? Also, which LEADTOOLS programming interface (DLL API, C++ Class library ,.NET classes, etc.) you are using?
 
#10 Posted : Monday, January 19, 2009 1:25:38 AM(UTC)

delemed  
delemed

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sorry, my fault
Leadtools V15 .Net Class Libraries
 
#11 Posted : Monday, January 19, 2009 3:36:37 AM(UTC)

Adnan Ismail  
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Please see the following forum post that shows how to Get\Set custom capabilities:
http://support.leadtools.com/SupportPortal/CS/forums/3277/ShowPost.aspx

The forum shows how to do that in LEADTOOLS version 14.5 .NET, which is not different than LEADTOOLS v15 .NET.
 
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