Scan multiple documents at once using separator sheets ?

Example requests & Code samples for GdPicture Toolkits.
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kparker
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Joined: Fri Feb 08, 2008 8:38 pm

Scan multiple documents at once using separator sheets ?

Post by kparker » Wed Feb 13, 2008 2:02 am

I posted this question in a different thread without much reaction; apologies for the duplication. I really need to figure this out before buying GdPicture for our application.
Here is the problem I'm trying to solve.
--->We would like to speed up scanning by feeding the scanner multiple documents at a time (as opposed to feeding the scanner on document at a time).
-->To respect the document boundaries, we insert separator sheets between consecutive documents. The separator sheet will be recognizable through visual patterns.

Does anybody know how I can recognize specific pattern on a scanned image in order to identify the separator sheets on the fly and recognize them as document delimiters?

Thanks

--

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Loïc
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Location: France
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Re: Scan multiple documents at once using separator sheets ?

Post by Loïc » Tue Feb 19, 2008 7:16 pm

Hi,

This (hard) feature will be included withih the next GdPicture V5 release.

I come back ASAP into this topic to give the best way to do that.


Best regards,

Loïc

kparker
Posts: 5
Joined: Fri Feb 08, 2008 8:38 pm

Re: Scan multiple documents at once using separator sheets ?

Post by kparker » Wed Mar 19, 2008 7:17 am

I've noticed the promised version 5 is out, and I just ordered a copy. Could you by any chance tell me how to solve this problem with this version?

Thanks.

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Loïc
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Posts: 5603
Joined: Tue Oct 17, 2006 10:48 pm
Location: France
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Code to Scan multiple documents at once using separator shee

Post by Loïc » Thu Mar 20, 2008 11:42 am

Hi,

You can use the folowing code to acquire multiple image from a document feeder using a separator sheets.


Notes:

- This code assumes that the first page in the feeder is a separator sheet.
- This code creates multipage PDF files. You can modify it easily in order to acquire into multipage TIFF files.
- This code is working from the GdPicture [PRO] V 5.0.5 :arrow: http://www.gdpicture.com/download.php


Code: Select all

Dim nPDFNo As Long
Dim nImageID As Long
Dim nTemplateSeparator As Long
Dim nCloserTemplate As Long
Dim nCpt As Long
Dim Imaging1 As Object


Set Imaging1 = CreateObject("gdpicturepro5.imaging") 'GdPicture Pro. For GdPicture Light must be "gdpicture4.imaging"
Imaging1.SetLicenseNumber ("YourLicenseKEY")
Imaging1.TwainOpenDefaultSource
Imaging1.TwainSetHideUI (True)
Imaging1.TwainSetAutoFeed (True)  'Set AutoFeed Enabled
Imaging1.TwainSetAutoScan (True) 'To  achieve the maximum scanning rate
     


'First STEP: We create a new document identifier template from a scan of the paper separator
nImageID = Imaging1.CreateImageFromTwain(Me.hWnd)
nTemplateSeparator = Imaging1.ADRCreateTemplateFromGdPictureImage(nImageID)
Imaging1.CloseImage (nImageID)
      
      
'Step 2, Now we will scan all the document feeder into several PDF files (a new PDF is created if a paper separator is detected)
nPDFNo = 1
Imaging1.TwainPdfStart ("output" & Str(nPDFNo) & ".pdf")
While Imaging1.CreateImageFromTwain(Me.hWnd) <> 0
      nCpt = nCpt + 1
      nImageID = Imaging1.GetNativeImage
      nCloserTemplate = Imaging1.ADRGetCloserTemplateForGdPictureImage(nImageID)

      If nCloserTemplate = nTemplateSeparator And Imaging1.ADRGetLastRelevance >= 92 Then
         'A paper separator seems to be detected, we start on a new output PDF
         Imaging1.TwainPdfStop
         nPDFNo = nPDFNo + 1
         Imaging1.TwainPdfStart ("output" & Str(nPDFNo) & ".pdf")
      Else
         Imaging1.TwainAddGdPictureImageToPdf (nImageID)
      End If

      Imaging1.CloseImage (nImageID)
Wend
Imaging1.TwainPdfStop
      
Call Imaging1.TwainCloseSource


Let me know if you have any question regarding this method.

Best regards,

Loïc Carrère

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