Category » View & Edit & Manage Images in Buffer

There were 18 articles found in this category:

1. Is there any memory limit for Dynamic Web TWAIN?
   Dynamic Web TWAIN provides 32 bit and 64 bit since version 6.3. Before that, there is only 32 bit version available. Below please find the memory limit of Windows for a 32-bit and 64-bit processes. Click here for more details. Memory type User-mode virtual address space for each 32-bit proc ...
2. What are the differences between BlankImageThreshold and BlankImageMaxStdDev?
   BlankImageThreshold: Blank Image Threshold Property is the dividing line between black & white. In this context, a pixel is considered a shade of grey with a value between 0 & 255. A pixel that is 0 is black. A pixel that is 255 is white. The Image Threshold Property lets algorithms know at w ...
3. How to get the file size (byte) of the scanned image?
   You can use the GetImageSize method or the GetImageSizeWithSpecifiedType method to get the file size (byte) of the image. Here is the code for your reference. You can also find attached a sample code. Code: 'VB 'get the file size of a specified image Dim ImageSize As String Private Sub Scan_Cli ...
4. Does Dynamic Web TWAIN support Zoom In/Out?
   Yes. Dynamic Web TWAIN provides Zoom property which allows you to zoom in/out the image. Besides Zoom property, you can also follow the steps below to achieve this: 1. Please change the following lines: ======================================= <object classid="clsid:E7DA7F8D-27AB-4EE9-8FC0-3 ...
5. 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 ...
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: Invalid index
   Symptom: When you edit, save or upload images, you may receive the following error message returned by the ErrorString property: Cause: The error may occur if you perform these operations without any image in buffer. Resolution: To avoid this problem, please make sure there are images in buff ...
10. How to rotate the scanned image data prior to transfer?
    You can use the methods below to rotate the scanned image data prior to transfer. Note: Before using these methods, please make sure that the driver of your device supports rotating prior to transfer. Method 1: Use ICAP_ROTATION to rotate images. For information about this capability, please cl ...
11. How to reduce the size of a scanned image before uploading?
    There are many ways to reduce the image size. 1. Set the pixel type of acquired images by using the PixelType property. The image will be much smaller in the type of Black&White or Gray. For more information about this property, please click here. 2. Change the value of the Resolution property. ...
12. How can I edit a particular image?
    First, please set the image you want to modify as the current image. Then you can call Image Editor to edit the image. Code (C#): //This snippet indicates how to use mouse event to set an image as the current image //and call Image Editor to edit the image. private void Scan_Click(object sender ...
13. How can I scan an inverted image?
    You can use the PixelFlavor property to set the pixel flavor for acquired images. Code: 'VB Private Sub Scan_Click() DynamicWebTwain1.OpenSource DynamicWebTwain1.PixelFlavor = 0 'Value = 0 Chocolate. Zero pixel represents darkest shade. 'Value = 1 Vanilla. Zero pixel represents ligh ...
14. Does Dynamic Web TWAIN support autodeskewing?
    Currently, Dynamic Web TWAIN does not support autodeskewing.
15. How can I rotate an image?
    You can use the RotateLeft method and the RotateRight method. Code: Private Sub Scan_Click() DynamicWebTwain1.AcquireImage End Sub Private Sub RotateLeft_Click() DynamicWebTwain1.RotateLeft 0 End Sub Private Sub RotateRight_Click() DynamicWebTwain1.RotateRight 0 End Sub Also, you can u ...
16. How can I change order of pages in buffer?
    You can use the SwitchImage method to change order of pages in buffer. Code (C#): private void Switch_Click(object sender, EventArgs e) { axDynamicWebTwain1.SwitchImage(0, 1); //the first two images switch order } References: SwitchImage
17. How can I view a specified image or go through all the images in buffer?
    You can use the following two methods to view a specified image or go through all the images in buffer: 1. Use the CurrentImageIndexInBuffer property. For example, you can use two buttons, "NextImage" and "PreImage". Code: 'view the next image in buffer Private Sub NextImage_Click() If (Dyna ...
18. How can I display an image in its full size?
    You can use the IfFitWindow property to display the image in its full size. Code (C#): private void Scan_Click(object sender, EventArgs e) { axDynamicWebTwain1.SelectSource(); axDynamicWebTwain1.OpenSource(); axDynamicWebTwain1.SetViewMode(-1, -1); //set the view mode to ...