Hi

I'm scanning the documents and viewing the pages in the dotimage Workspaceviewer. If i scan a blank page how to recognize the blank page in order to delete that page. can any one suggest.

GRK

AdvancedDocClean has the functionality. Please use BlankPageDetectionCommand and BlankPageDetectionResults. Sample codes are as below:

BlankPageDetectionCommand cmd = new BlankPageDetectionCommand();
cmd.SpeedFactor = RunSpeed.Fast; // Choose one among Normal, Fast, Faster, Fastest
cmd.MinObjectSize = new Size(30, 30); // noises of which size smaller then MinObjectSize will be ignored
BlankPageDetectionResults res = (BlankPageDetectionResults)cmd.Apply(image);

then the boolean res.IsImageBlank will tells you whether the page is blank or not.

hi seung,

   I found the code useful for removing the blank pages but unfortunately we haven't buyed the license for the dotImage.AdvancedDocClean.dll. I have licenses only for dotImage,dotTwain .Thanks anyway for your immediate reply.

-regards

GRK

The Advanced Document Clean Up method for finding blank pages works really great, but there is another way.  You can simply do a histogram analysis of the image and see how many colors come back.  Check out the KB which explains this method.

http://www.atalasoft.com/kb/article.aspx?id=10050&cNode=

This method is no where near as accurate as the ADC method, but it provides a good guess.

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Sean McKenna
Atalasoft Development Team

I used the BlankPageDetection command as suggested. It works with images scanned in with pixeltype set to "Color". But with pixeltype set to "BlackAndWhite", it fails to detect blank page. I guess this is because of the borders came back with "BlackAndWhite" scanning. So I set the RegionOfInterest -- to apply the BlankPageDetection to the center of a image, it doesn't make any difference. Any suggestions?