The AutoPreprocess(OcrAutoPreprocessPageCommand,Int32,Int32,OcrProgressCallback) Method is available as an add-on to the LEADTOOLS Document and Medical Imaging toolkits.
- command
- The preprocessing command to perform.
- firstPageIndex
- The zero-based index of the first page to preprocess.
- lastPageIndex
- The zero-based index of the last page to preprocess. A value of -1 means preprocess up to and including the last page in the OCR document.
- callback
- Optional callback to show operation progress.
Visual Basic (Declaration) | |
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Overloads Sub AutoPreprocess( _ ByVal command As OcrAutoPreprocessPageCommand, _ ByVal firstPageIndex As Integer, _ ByVal lastPageIndex As Integer, _ ByVal callback As OcrProgressCallback _ ) |
Visual Basic (Usage) | ![]() |
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Dim instance As IOcrPageCollection Dim command As OcrAutoPreprocessPageCommand Dim firstPageIndex As Integer Dim lastPageIndex As Integer Dim callback As OcrProgressCallback instance.AutoPreprocess(command, firstPageIndex, lastPageIndex, callback) |
C# | |
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void AutoPreprocess( OcrAutoPreprocessPageCommand command, int firstPageIndex, int lastPageIndex, OcrProgressCallback callback ) |
C++/CLI | |
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void AutoPreprocess( OcrAutoPreprocessPageCommand command, int firstPageIndex, int lastPageIndex, OcrProgressCallback^ callback ) |
Parameters
- command
- The preprocessing command to perform.
- firstPageIndex
- The zero-based index of the first page to preprocess.
- lastPageIndex
- The zero-based index of the last page to preprocess. A value of -1 means preprocess up to and including the last page in the OCR document.
- callback
- Optional callback to show operation progress.
This method will iterate through pages between firstPageIndex and lastPageIndex in this OCR document and run IOcrPage.AutoPreprocess on each page.
You can use this method to deskew, rotate or invert the image according to command. By performing auto pre-processing on the page, you can improve the image quality of draft mode faxes.
You can use the OcrProgressCallback to show the operation progress or to abort it. For more information and an example, refer to OcrProgressCallback.
You should call this method prior to calling Recognize.
To perform auto-preprocessing on all the pages in the OCR document use AutoPreprocess(OcrAutoPreprocessPageCommand command, OcrProgressCallback callback).
Target Platforms: Microsoft .NET Framework 2.0, Windows 2000, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7
Reference
IOcrPageCollection InterfaceIOcrPageCollection Members
Overload List
IOcrPage.AutoPreprocess
OcrAutoPreprocessPageCommand Enumeration
IOcrPage.GetDeskewAngle
IOcrPage.GetRotateAngle
IOcrPage.IsInverted
Recognize
IOcrPageCollection Interface
IOcrZoneCollection Interface
OcrZone Structure
Programming with Leadtools .NET OCR