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POVB.NET: Windows Image Acquisition 2 duplex scan
 

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  1. POVB.NET: Windows Image Acquisition 2 duplex scan
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    <p>I got the following code for duplex scanning which uses WIA2 for communication with scanners. It works perfectly with Fujitsu fi-6130 but there is an issue with Epson GT-S55. The problem is, it saves the second image of the duplex scan blank (in black color). Is there a property that I'm missing here?.</p> <pre><code>Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click ADFScan() End Sub Public Sub ADFScan() Dim WiaDialog1 As New WIA.CommonDialog Dim WiaDevice1 As WIA.Device = WiaDialog1.ShowSelectDevice(WIA.WiaDeviceType.ScannerDeviceType, False, False) WiaDevice1.Properties("3088").let_Value("4") 'WIA_DPS_DOCUMENT_HANDLING_SELECT = 3088, DUPLEX = 4 Dim Image1 As WIA.ImageFile = DirectCast(WiaDevice1.Items(1).Transfer(WIA.FormatID.wiaFormatBMP), WIA.ImageFile) 'Paper side A Dim Image2 As WIA.ImageFile = DirectCast(WiaDevice1.Items(1).Transfer(WIA.FormatID.wiaFormatBMP), WIA.ImageFile) 'Paper side B Image1.SaveFile("C:\SideA.bmp") Image2.SaveFile("C:\SideB.bmp") End Sub </code></pre> <p>I tried setting the WIA_DPS_PAGES property to 1 as suggested in <a href="https://stackoverflow.com/questions/11331498/c-sharp-wia-with-automatic-document-feeder-adf-retuns-only-one-page-on-certain">C# WIA with Automatic Document Feeder (ADF) retuns only one page on certain scanners</a> but it didn't worked.</p> <p>These are some of the properties set by default for the Epson scanner.</p> <pre><code>Property name ID Value -------------------------------------------------------------- Document Handling Capabilities 3086 33 Document Handling Select 3088 1 Document Handling Capacity 3089 100 Pages 3096 0 </code></pre> <p>Thanks in advance.</p>
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    1. COAfter a lot of research and testing, i realized that WIA2 has a completely different behavior with different scanners irrelevant of the properties that you may set. So, in order to use the feeder and duplex property of my scanners, I finally decided to try TWAIN. I found a great open source project called TwainDotNet https://github.com/tmyroadctfig/twaindotnet which is based on another great project the openTWAIN http://opentwain.codeplex.com/. It contains all the dlls for the communication and sample code for VB.NET and C#.
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