HOW TO: Use the ConversionEngine

#1 Posted : Monday, December 4, 2017 10:14:17 AM(UTC)

Duncan Quirk

Groups: Registered, Tech Support, Administrators
Posts: 70

Was thanked: 4 time(s) in 4 post(s)

The LEADTOOLS CloudServices library provides developers with an easy to use interface to convert files to and from any Raster/Document format that the LEADTOOLS SDK supports. The ConversionEngine class provides two methods to convert files -- ConvertToRaster, and ConvertToDocument. The ConvertToRaster method allows conversion to any file format defined in the RasterImageFormat enum, whereas the ConvertToDocument method allows conversion to any file format defined in the DocumentFormat enum.

Both methods return an IEnumerable stream containing either 1 stream if the output format is multi-page or multiple streams if the input file was multi-page and the output format selected is single-page.

Code:


         var inputStream = File.Open(@"leadtools.pdf", FileMode.Open);
         LoadDocumentOptions loadOptions = new LoadDocumentOptions()
         {
            FirstPageNumber = 1,
            LastPageNumber = 1
         };

         ConversionEngine conversionEngine = new ConversionEngine();
         var outputStream = conversionEngine.ConvertToRaster(inputStream, loadOptions, RasterImageFormat.TifJpeg411, null); //Returns an enumerable list of streams
         foreach(var stream in outputStream)
         {
            //Process converted stream
         }

Code:


         var inputStream = File.Open(@"leadtools.pdf", FileMode.Open);
         LoadDocumentOptions loadOptions = new LoadDocumentOptions()
         {
            FirstPageNumber = 1,
            LastPageNumber = 1
         };

         ConversionEngine conversionEngine = new ConversionEngine();
         IOcrEngine engine = OcrEngineManager.CreateEngine(OcrEngineType.LEAD, false);
         engine.Startup(null, null, null, @"path/to/OCR Bin Directory");

         var outPutStream = conversionEngine.ConvertToDocument(inputStream, loadOptions, DocumentFormat.Doc, engine, null);
         foreach (var stream in outputStream)
         {
            //Process converted stream
         }

For reference, all supported file formats can be found on our website here: https://www.leadtools.com/sdk/formats
RasterImageFormat Enum: https://www.leadtools.co...l/rasterimageformat.html
DocumentFormat Enum: https://www.leadtools.co...h/ft/documentformat.html

Edited by user Friday, December 29, 2017 4:23:57 PM(UTC) | Reason: Not specified

Duncan Quirk
Developer Support Engineer
LEAD Technologies, Inc.


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HOW TO: Use the ConversionEngine