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Image Export

In addition to exporting scanned documents as PDF, you can also retrieve the pages of the currently scanned document as image files (JPG).

Initialization​

Initialize the Docutain SDK for .NET MAUI as described here.

Export scanned pages as image files​

Write images to local files​

In order to write the currently scanned pages to local JPG files, you can use the Document.WriteImage method. Pass the page you want to export as JPG and the target path where to save it. If you want to export all pages as JPG, you can get the number of pages via Document.PageCount and loop through all pages like in the follwing example:

using Docutain.SDK.MAUI;

//...
//scan a document
//...

int pages = Document.PageCount;
for (int p = 1; p <= pages; p++)
{
    string targetFilePath = string.Format("{0}/Image_{1}.jpg", path, p);
    string imageFile = Document.WriteImage(p, targetFilePath);
}

Get images as byte[]​

Getting the pages as JPG byte array improves performance as it does not include any Disk I/O. To do so, you can call Document.GetImageBytes, pass it the page number of the page to be exported as JPG and an optional PageSourceType.

using Docutain.SDK.MAUI;

//...
//scan a document
//...

int pages = Document.PageCount;
for (int p = 1; p <= pages; p++)
{
    byte[] image = Document.GetImageBytes(p);
}

For PageSourceType you have the following options:

  • PageSourceType.CutFilter This is the default value if you do not provide any. The image will be the cut and filtered image which is the one the user sees when finishing the scan process.

  • PageSourceType.CutOnly This will give you the cut but unfiltered image. If you for example use the image for further processing in your own OCR pipeline which uses custom filter operations, this option might improve your OCR results as opposed to PageSourceType.CutFilter. But this is no general rule and highly depends on your pipeline.

  • PageSourceType.Original This will give you the uncut, unfiltered image as it was provided by the camera.