Leadtools.Forms.Ocr Namespace > IOcrDocument Interface > SaveXml Method : SaveXml(OcrXmlOutputOptions) Method |
string SaveXml( OcrXmlOutputOptions options )
'Declaration Overloads Function SaveXml( _ ByVal options As OcrXmlOutputOptions _ ) As String
'Usage Dim instance As IOcrDocument Dim options As OcrXmlOutputOptions Dim value As String value = instance.SaveXml(options)
string SaveXml( OcrXmlOutputOptions options )
function Leadtools.Forms.Ocr.IOcrDocument.SaveXml(OcrXmlOutputOptions)( options )
String^ SaveXml( OcrXmlOutputOptions options )
To save the output document as XML to a disk file or a .NET stream, use IOcrDocument.SaveXml(string fileName, OcrXmlOutputOptions options) and IOcrDocument.SaveXml(Stream stream, OcrXmlOutputOptions options).
Each IOcrPage object in the Pages collection of this IOcrDocument object holds its recognition data internally. This data is used by this method to generate the final output document.
Typical OCR operation using the IOcrEngine involves starting up the engine. Creating a new IOcrDocument object using the IOcrDocumentManager.CreateDocument method before adding the pages into it and perform either automatic or manual zoning. Once this is done, you can use the IOcrPage.Recognize method of each page to collect the recognition data and store it internally in the page. After the recognition data is collected, you use the various IOcrDocument.Save methods to save the document to its final format as well as IOcrDocument.SaveXml to save as XML.
You can also use the IOcrPage.RecognizeText method to recognize and return the recognition data as a simple System.String object.
You can use IOcrDocument.SaveXml as many times as required to save the document to multiple formats. You can also continue to add and recognize pages (through the IOcrPage.Recognize method after you save the document.
For each IOcrPage that is not recognized (the user did not call Recognize and the value of the page IOcrPage.IsRecognized is still false) the IOcrDocument will insert an empty page into the final document.
To get the low level recognition data including the recognized characters and their confidence, use IOcrPage.GetRecognizedCharacters instead.
The IOcrDocument interface implements System.IDisposable, hence you must dispose the IOcrDocument object as soon as you are finished using it. Disposing an IOcrDocument object will free all the pages stored inside its IOcrDocument.Pages collection.
Imports Leadtools Imports Leadtools.Codecs Imports Leadtools.Forms.Ocr Imports Leadtools.Forms Imports Leadtools.WinForms Imports Leadtools.Drawing Private Sub SaveAndProcessXmlExample() Dim tifFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Ocr1.tif") ' Create an instance of the engine Using ocrEngine As IOcrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Advantage, False) ' Start the engine using default parameters ocrEngine.Startup(Nothing, Nothing, Nothing, LEAD_VARS.OcrAdvantageRuntimeDir) ' Create an OCR document Using ocrDocument As IOcrDocument = ocrEngine.DocumentManager.CreateDocument() ' Add this image to the document Dim ocrPage As IOcrPage = ocrDocument.Pages.AddPage(tifFileName, Nothing) ' Recognize it ocrPage.Recognize(Nothing) ' Get the recognition data as XML Dim xml As String = ocrDocument.SaveXml(OcrXmlOutputOptions.None) ' Process the data by showing all the words Using reader As New System.IO.StringReader(xml) Dim doc As New System.Xml.XPath.XPathDocument(reader) Dim nav As System.Xml.XPath.XPathNavigator = doc.CreateNavigator() ' Select all the <word> elements Dim iter As System.Xml.XPath.XPathNodeIterator = nav.Select("//word") Console.WriteLine("Word found:") While iter.MoveNext() Console.WriteLine(iter.Current.Value) End While End Using End Using ' Shutdown the engine ' Note: calling Dispose will also automatically shutdown the engine if it has been started ocrEngine.Shutdown() End Using End Sub Public NotInheritable Class LEAD_VARS Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images" Public Const OcrAdvantageRuntimeDir As String = "C:\LEADTOOLS 18\Bin\Common\OcrAdvantageRuntime" End Class
using Leadtools; using Leadtools.Codecs; using Leadtools.Forms.Ocr; using Leadtools.Forms; using Leadtools.WinForms; using Leadtools.Drawing; private void SaveAndProcessXmlExample() { string tifFileName = Path.Combine(LEAD_VARS.ImagesDir, "Ocr1.tif"); // Create an instance of the engine using (IOcrEngine ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Advantage, false)) { // Start the engine using default parameters ocrEngine.Startup(null, null, null, LEAD_VARS.OcrAdvantageRuntimeDir); // Create an OCR document using (IOcrDocument ocrDocument = ocrEngine.DocumentManager.CreateDocument()) { // Add this image to the document IOcrPage ocrPage = ocrDocument.Pages.AddPage(tifFileName, null); // Recognize it ocrPage.Recognize(null); // Get the recognition data as XML string xml = ocrDocument.SaveXml(OcrXmlOutputOptions.None); // Process the data by showing all the words using (System.IO.StringReader reader = new System.IO.StringReader(xml)) { System.Xml.XPath.XPathDocument doc = new System.Xml.XPath.XPathDocument(reader); System.Xml.XPath.XPathNavigator nav = doc.CreateNavigator(); // Select all the <word> elements System.Xml.XPath.XPathNodeIterator iter = nav.Select(@"//word"); Console.WriteLine("Word found:"); while (iter.MoveNext()) { Console.WriteLine(iter.Current.Value); } } } // Shutdown the engine // Note: calling Dispose will also automatically shutdown the engine if it has been started ocrEngine.Shutdown(); } } static class LEAD_VARS { public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images"; public const string OcrAdvantageRuntimeDir = @"C:\LEADTOOLS 18\Bin\Common\OcrAdvantageRuntime"; }
using Leadtools; using Leadtools.Codecs; using Leadtools.Forms.Ocr; using Leadtools.Forms; private async Task SaveAndProcessXmlExample() { string tifFileName = @"Assets\Ocr1.tif"; // Create an instance of the engine IOcrEngine ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Advantage, false); // Start the engine using default parameters ocrEngine.Startup(null, null, String.Empty, Tools.OcrEnginePath); // Create an OCR document IOcrDocument ocrDocument = ocrEngine.DocumentManager.CreateDocument(); // Add this image to the document IOcrPage ocrPage = null; using (RasterCodecs codecs = new RasterCodecs()) { StorageFile loadFile = await Tools.AppInstallFolder.GetFileAsync(tifFileName); using (RasterImage image = await codecs.LoadAsync(LeadStreamFactory.Create(loadFile))) ocrPage = ocrDocument.Pages.AddPage(image, null); } // Recognize it ocrPage.Recognize(null); // Get the recognition data as XML string xml = ocrDocument.SaveXml(OcrXmlOutputOptions.None); // Process the data by showing all the words using (System.IO.StringReader reader = new System.IO.StringReader(xml)) { System.Xml.XmlReader xmlReader = System.Xml.XmlReader.Create(reader); xmlReader.MoveToContent(); while (xmlReader.Read()) { if (xmlReader.NodeType == XmlNodeType.Element) { if (xmlReader.Name == @"//word") { Debug.WriteLine(xmlReader.Value); } } } } // Shutdown the engine ocrEngine.Shutdown(); }
IOcrDocument Interface
IOcrDocument Members
Overload List
Leadtools.Forms.DocumentWriters.DocumentFormat
IOcrDocumentManager Interface
IOcrDocument.Save
IOcrDocument.SaveXml
IOcrPage.Recognize
IOcrEngine Interface
OcrEngineManager Class
OcrEngineType Enumeration
Programming with the LEADTOOLS .NET OCR
Files to be Included with Your Application