Category » Use ADF & Multiple Scan

There were 11 articles found in this category:

1. How to use ADF?
   You can use the IfAutoFeed property to set whether the Source enable automatic document feeding process. Note: The default maximum number of images can be held in buffer is one. If you want to scan multiple images, you should use the MaxImagesInBuffer property to set the maximum number. For inf ...
2. How many pages could the software scan at most once?
   The number of the pages that can be scanned by using ADF at a time is unlimited. However, the number of the pages can be held in buffer is limited. When the number of scanned images is beyond the maximum number of images can be held in buffer, the previous scanned images in buffer will be cover ...
3. How to detect whether your device supports ADF?
   You can use CAP_FEEDERENABLED to detect whether your scanner supports ADF. For information about capability negotiation, please click here. JavaScript Code: function DetectADF() { frmScan.DynamicWebTwain1.OpenSource(); frmScan.DynamicWebTwain1.Capability = 0x1002; //CAP_FEEDERENABLED ...
4. Why I only get the last image in Dynamic Web TWAIN when multiple documents have been scanned through ADF?
   Symptom: You may find only the last image is held in buffer after you scan multiple images by using ADF. Cause: The behavior may occur if the value of the maximum number of images can be held in buffer is not set. The default maximum number is one. When you scan multiple images, the previous sc ...
5. How to detect whether the scanner has actually finished scanning?
   You can use the OnPostAllTransfers event, which is trigged after all transfers end, to let your users know that scanning has finished. Code: <script language="javascript" type="text/javascript"> function btnScan_onclick() { frmScan.DynamicWebTwain1.SelectSource(); frmScan.Dynamic ...
6. Why do I only get the first image into Dynamic Web TWAIN although multiple documents have been scanned through ADF?
   Symptom: You may find only the first image is held in buffer after you scan multiple images by using ADF. Cause: The source is closed after the first transfer ends. Resolution: You can follow the steps below to solve the problem: 1. Please check if the CloseSource method or the CloseSourceManage ...
7. How can I add new pages to an existing image file?
   First, you should load the image file to Dynamic Web TWAIN. Currently, we only ensure that images created by Dynamic Web TWAIN or Dynamic TWAIN can be loaded successfully. You can use the LoadImage method or the LoadImageEx method to load the image file to Dynamic Web TWAIN. Before acquiring im ...
8. How can I insert new scanned images to an existing multi-page file?
   First, you should load the image file to Dynamic Web TWAIN. Currently, we only ensure that images created by Dynamic Web TWAIN or Dynamic TWAIN can be loaded successfully. You can use the LoadImage method or the LoadImageEx method to load the image file to Dynamic Web TWAIN. Before acquiring im ...
9. Error message: Sequence error
   Symptoms: When you acquire images from your TWAIN compatible device, you may receive the following error message returned by the ErrorString property: Cause: The problem may happen when the process does not occur in a particular sequence. Resolutions: Please check if you followed the acquisitio ...
10. Error message: General failure
    Symptoms: When you try scanning an image, you may receive the following error message returned by the ErrorString property: Cause: The problem may occur when the source is NOT disabled completely after a transfer ends or the source is currently unavailable. Resolutions: 1. You can call the Clo ...
11. How can I do a duplex scan?
    First, please check if your device supports duplex scanning. You can use the Duplex property to check that. If your device supports duplex scanning, you can use the IfDuplexEnabled property to enable duplex. Code: Private Sub DuplexScan_Click() Twain.SelectSource Twain.OpenSource ...