Leadtools.RasterException

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本帖最后由 williamxuj 于 2016-8-4 19:04 编辑

我在试用OCR，然后报Leadtools.RasterException异常，Message：TIF codec is needed to use this feature
环境C# 4.5，Windows10，vs2015
报错在ocrDocument.Pages.AddPages(@"C:\Users\Public\Documents\LEADTOOLS Images\OCR1.tif", 1, -1, null);这行
代码如下：
         // Assuming you added "using Leadtools.Codecs;", "using Leadtools.Forms.Ocr;" and "using Leadtools.Forms.DocumentWriters;" at the beginning of this class
         // *** Step 1: Select the engine type and create an instance of the IOcrEngine interface.

         // We will use the LEADTOOLS OCR Advantage engine and use it in the same process
         IOcrEngine ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Advantage, false);

         // *** Step 2: Startup the engine.

         // Use the default parameters
         ocrEngine.Startup(null, null, null, @"C:\LEADTOOLS 19\Bin\Common\OcrAdvantageRuntime");

         // *** Step 3: Create an OCR document with one or more pages.

         IOcrDocument ocrDocument = ocrEngine.DocumentManager.CreateDocument();

         // Add all the pages of a multi-page TIF image to the document
         ocrDocument.Pages.AddPages(@"C:\Users\Public\Documents\LEADTOOLS Images\OCR1.tif", 1, -1, null);

         // *** Step 4: Establish zones on the page(s), either manually or automatically

         // Automatic zoning
         ocrDocument.Pages.AutoZone(null);

         // *** Step 5: (Optional) Set the active languages to be used by the OCR engine

         // Enable English and German languages
         ocrEngine.LanguageManager.EnableLanguages(new string[] { "en", "de" });

         // *** Step 6: (Optional) Set the spell checking engine

         // Enable the spell checking system
         ocrEngine.SpellCheckManager.SpellCheckEngine = OcrSpellCheckEngine.Native;

         // *** Step 7: (Optional) Set any special recognition module options

         // Change the zone method for the first zone in the first page to be Graphics so it will not be recognized
         OcrZone ocrZone = ocrDocument.Pages[0].Zones[0];
         ocrZone.ZoneType = OcrZoneType.Graphic;
         ocrDocument.Pages[0].Zones[0] = ocrZone;

         // *** Step 8: Recognize

         ocrDocument.Pages.Recognize(null);

         // *** Step 9: Save recognition results

         // Save the results to a PDF file
         ocrDocument.Save(@"C:\Users\Public\Documents\LEADTOOLS Images\Document.pdf", DocumentFormat.Pdf, null);
         ocrDocument.Dispose();

         // *** Step 10: Shut down the OCR engine when finished
         ocrEngine.Shutdown();
         ocrEngine.Dispose();

论坛以前也没人提过这个异常
请问这个怎么解?