Take the following steps to start a project and to add some code that will load an image and read its barcodes in a Windows Store application using LEADTOOLS WinRT libraries.
<!DOCTYPE html> <html> <head> <meta charset="utf-8" /> <title>OCRImage</title> <!-- WinJS references --> <link href="//Microsoft.WinJS.1.0/css/ui-dark.css" rel="stylesheet" /> <script src="//Microsoft.WinJS.1.0/js/base.js"></script> <script src="//Microsoft.WinJS.1.0/js/ui.js" ></script> <!-- OCRImage references --> <link href="/css/default.css" rel="stylesheet" /> <script src="/js/default.js" ></script> </head> <body> <input id="btnLoadAndRecognize" type="button" value="Load And Recognize Text" /> <br /> <p id="statusText" ></p> <br /> <textarea id="resultsTextArea" readonly="readonly" style="width: 500px; height: 500px" ></textarea> <br /> </body> </html>
// For an introduction to the Blank template, see the following documentation: // http://go.microsoft.com/fwlink/?LinkId=232509 (function () { "use strict"; WinJS.Binding.optimizeBindingReferences = true; var app = WinJS.Application; var activation = Windows.ApplicationModel.Activation; app.onactivated = function (args) { if (args.detail.kind === activation.ActivationKind.launch) { if (args.detail.previousExecutionState !== activation.ApplicationExecutionState.terminated) { // TODO: This application has been newly launched. Initialize // your application here. LoadAndRecognize() document.getElementById("btnLoadAndRecognize").addEventListener("click" , LoadAndRecognize, false ); // replace this with RasterSupport.SetLicense when you have a valid runtime license. Leadtools.RasterSupport.initialize(); //Create and start the OCR engine var engineDirectory = Windows.ApplicationModel.Package.current.installedLocation.path + "\\OCRRuntime"; _ocrEngine = Leadtools.Forms.Ocr.OcrEngineManager.createEngine(Leadtools.Forms.Ocr.OcrEngineType.advantage, false); var _ocrCodecs = new Leadtools.Codecs.RasterCodecs(); _ocrEngine.startup(_ocrCodecs, null , "", engineDirectory); _document = _ocrEngine.documentManager.createDocument(); } else { // TODO: This application has been reactivated from suspension. // Restore application state here. } args.setPromise(WinJS.UI.processAll()); } }; app.oncheckpoint = function (args) { // TODO: This application is about to be suspended. Save any state // that needs to persist across suspensions here. You might use the // WinJS.Application.sessionState object, which is automatically // saved and restored across suspension. If you need to complete an // asynchronous operation before your application is suspended, call // args.setPromise(). }; app.start(); var _ocrEngine = null ; var _document = null ; function LoadAndRecognize() { // Create a file picker object var openPicker = new Windows.Storage.Pickers.FileOpenPicker(); openPicker.viewMode = Windows.Storage.Pickers.PickerViewMode.thumbnail; openPicker.suggestedStartLocation = Windows.Storage.Pickers.PickerLocationId.picturesLibrary; openPicker.ViewMode = Windows.Storage.Pickers.PickerViewMode.List; //Add a few supported file types openPicker.fileTypeFilter.append(".jpg"); openPicker.fileTypeFilter.append(".jpeg"); openPicker.fileTypeFilter.append(".jxr"); openPicker.fileTypeFilter.append(".png"); openPicker.fileTypeFilter.append(".bmp"); openPicker.fileTypeFilter.append(".pcx"); openPicker.fileTypeFilter.append(".tif"); openPicker.fileTypeFilter.append(".tiff"); openPicker.fileTypeFilter.append(".j2k"); openPicker.fileTypeFilter.append(".jbg" ); openPicker.fileTypeFilter.append(".gif"); openPicker.fileTypeFilter.append(".jls"); openPicker.fileTypeFilter.append(".jb2"); openPicker.fileTypeFilter.append(".psd"); openPicker.fileTypeFilter.append(".dcm"); openPicker.fileTypeFilter.append(".dic"); openPicker.fileTypeFilter.append(".pdf"); // Open the picker for the user to pick a file openPicker.pickSingleFileAsync().then(function (file) { if (!file) { // The picker was dismissed with no selected file return; } document.getElementById('resultsTextArea').value = ""; // Create a RasterCodecs object to load the file var codecs = new Leadtools.Codecs.RasterCodecs(); document.getElementById('statusText').innerText = "Loading image..."; // Create a LEAD stream for the file var leadStream = Leadtools.LeadStreamFactory.create(file); // Load it codecs.options.load.initAlpha = true ; codecs.loadAsync(leadStream, 32, Leadtools.Codecs.CodecsLoadByteOrder.bgr, 1, 1 ).then(function (rasterImage) { _document.pages.clear(); //Add the page to the OCR document _document.pages.addPage(rasterImage, null); document.getElementById('statusText').innerText = "Recognizing Text..."; //Recognize the text var results = _document.pages[0].recognizeText(null); if (results.length == 0) { document.getElementById('statusText').innerText = "No text recognized"; } else { //Show the results document.getElementById('resultsTextArea').value = results; document.getElementById('statusText').innerText = "Complete"; } }, function (e) { var msg = new Windows.UI.Popups.MessageDialog("Error loading image"); msg.showAsync(); document.getElementById('statusText').innerText = "Error loading image"; }); }); } })();