Re: When start to scan, paper jam has happened, then cotinue to scan, the same two image are saved.

Hello,

Sorry to trouble you.
My leadtools version is 15.0J

I have two papers. Then start to scan front . The first paper is normal scanned.When the second paper is scanning, paper Jam has happend. Then I delete the first image(the first paper). Beacause the second paper is jammed,so in the image directory,there is nothing.

I open scanner,get the jammed paper and put this paper into feeder. Then continue to scan.This paper is scanned successfully.But in the image directory,there are two same image saved.

I only scan one paper,but this case ,there are two same image. If I scan front and black,there will four image.

Why?

 

AcquirePageEvent source:

Private Sub AcquirePageEvent(ByVal sender As Object, ByVal e As TwainAcquirePageEventArgs)
        Dim strImageFileName As String
        Dim intDegrees As Integer

        ' get file name
        strImageFileName = GetImageFileName()

        ' get degrees
        intDegrees = GetDegrees()

        If intDegrees <> ENM_ORIENTATION.DEGREES_0 Then
            RotateImage(intDegrees, e.Image)
        End If

        ' save image
        _codecs.Save(e.Image, strImageFileName, fileFormat, e.Image.BitsPerPixel)

    End Sub

When the paper jam happens, do you continue scanning in the same Twain Session? Try to shutdown the session and start a new session and see if this fixes the double scanning problem.

Thanks for your reply.

I have confirmed that I continue scanning in the same Twain Session.

If  I shutdown the session and create new session, I think that will solve this problem.

But I don't want to do like this beacause I have set some capablity before scan. If I shutdown that session,I am afraid that these capablity will lose. Then I use the new session to continue scanning and not reset these capablity that will be wrong. If I reset these capablity,run speed will be slow.So I don't want to do like that.

Do you have the better method to solve this problem?

Or give me some ideas.

Waiting your reply

Since you are recovering from a paper jam situation, I think you already lost the scanning speed feature. This means you will not lose much more by setting a few capability values.

In any case, there is no feature in LEADTOOLS to correct for a 'double scan' case like the one you're getting.