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 Scanning with Scanner Dialog		  New Topic  Reply to Topic
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AndyColmes

USA
351 Posts
Posted - Feb 17 2012 :  02:19:29  Show Profile  Reply
I am scanning with the Scanner TWAIN Dialog. I set the DPI value from the TWAIN Dialog but somehow the image property is always 300 DPI. Is there a way to set the true DPI value after scanning? I am using the example that uses iemioLoad with the OnAcquireBitmap event.

Thanks.

fab

1310 Posts
Posted - Feb 17 2012 :  08:01:32  Show Profile  Reply
It is only possible to instruct the scanner driver to acquire with a given DPI, with:
ImageEnView.IO.TwainParams.XResolution := DPI;
ImageEnView.IO.TwainParams.YResolution := DPI;

You can also set the DPI informative tag, after scanning, with:

ImageEnView.IO.Params.DPI := DPI;

Of course, the above code doesn't change the actual image resolution, but only the informative DPI tag.
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