Save two images with one scan

[mcnewsxp]

is it possible to create two images - one color and one black and white - for OCR and archiving with a single pass?

[fbmachines]

Good question. I could see the use for this also. If it isn't available in the twain control itself you could probably do an automatic conversion behind the seens with the GDPicture control but this might be too slow for a normal (and High) speed autofeed duplex scanning app. with many documents. Loic might know a more streamlined way to do this without bogging down an app.

[Loïc]

Hi,

You can do like that (visual basic sample):

Code: Select all

   Dim nImageID As Long
   
   twain1.TwainOpenDefaultSource
   twain1.TwainSetErrorMessage (True)
   twain1.TwainSetHideUI (True)
   twain1.TwainSetCurrentPixelType (TWPT_RGB)
   twain1.TwainSetCurrentBitDepth (8)
   nImageID = twain1.TwainAcquireToImageID(Me.hWnd)
   twain1.TwainCloseSource
   If nImageID <> 0 Then
      'save as 24bpp
      twain1.SaveAsTiff ("tif24bpp")
      'now save as 1bpp
      twain1.ConvertTo1Bpp
      twain1.SaveAsTiff ("tif1bpp")
      twain1.CloseImage (nImageID)
   End If

Regards,

Loïc

[mcnewsxp]

what i would like to do is one B&W and one color.
one for OCR and one for archive.
?????

[Loïc]

Hi,

The code I gave you do that:

One Image color and one B&W image.


Loïc

[mcnewsxp]

cool
i'll try it,
thanks much!