black & white

Discussions about TWAIN & WIA scanning in GdPicture.NET using GdPictureImaging.
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mcnewsxp
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Joined: Thu Sep 06, 2007 7:27 pm

black & white

Post by mcnewsxp » Sat Nov 17, 2007 6:28 pm

how can i scan in black & white only?
tia,
mcnewsxp
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Loïc
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Post by Loïc » Mon Nov 19, 2007 4:04 pm

You can do that using the TwainSetCurrentPixelType() & TwainSetCurrentBitDepth() methods:

Code: Select all

oTwain.TwainSetCurrentPixelType (TWPT_BW) 
oTwain.TwainSetCurrentBitDepth (1)

Regards,

Loïc
Last edited by Loïc on Sun Nov 25, 2007 7:19 pm, edited 1 time in total.
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mcnewsxp
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Joined: Thu Sep 06, 2007 7:27 pm

Post by mcnewsxp » Sun Nov 25, 2007 7:17 pm

i get a TWPT_BW is not defined from vb.net
is there a numeric value?
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mcnewsxp
Posts: 11
Joined: Thu Sep 06, 2007 7:27 pm

Post by mcnewsxp » Sun Nov 25, 2007 7:24 pm

i tried:
Axtwain1.TwainSetCurrentResolution(200)
Axtwain1.TwainSetCurrentPixelType(Gdtwain.TwainPixelType.TWPT_BW)
Axtwain1.TwainSetCurrentBitDepth(1)

but my image still scanned color.
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mcnewsxp
Posts: 11
Joined: Thu Sep 06, 2007 7:27 pm

Post by mcnewsxp » Sun Nov 25, 2007 7:28 pm

had to move the code to the InitScanConfig method.
works fine.
thanks much.
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Loïc
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Post by Loïc » Tue Nov 27, 2007 3:42 pm

You are welcome!



Loïc



PS:
get a TWPT_BW is not defined from vb.net
is there a numeric value?
yes => https://www.gdpicture.com/references/gdt ... lType.html
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