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Automatic rotation of pages via ABBYY FineReader Engine

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Written by Permanently deleted user
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Via the following post it should be possible to rotate images via FineReader Engine

http://forum.ocrsdk.com/thread/588-rotation-image-via-fine-reader-engine/

In one of the reactions a pointer has been given to some (what seems) .NET-code

Is there any chance of a sample in Java (for the com.abbyy.finereader jar) or Java-documentation in any kind?

At the moment we fully OCR an image but like to automatically rotate if a landscape page has been scanned in portrait mode

    private final static String DLL_FOLDER = "/opt/ABBYY/FREngine11/Bin";
    private final static String DEVELOPER_SN = "SWED....................";
    private void ocrPdf(String inputPdfFilename, String outputPdfFilename) throws Exception {
        //init FREngine/IEngine with default profile
        IEngine engine = Engine.GetEngineObject(DLL_FOLDER, DEVELOPER_SN);
        engine.LoadPredefinedProfile("DocumentConversion_Accuracy");

        //create new document and insert PDF
        IFRDocument document = engine.CreateFRDocument();
        document.AddImageFile(inputPdfFilename, null, null);
        
        //process full document
        document.Process(null);
        
        // Save results to pdf using 'balanced' scenario
        IPDFExportParams pdfParams = engine.CreatePDFExportParams();
        pdfParams.setScenario( PDFExportScenarioEnum.PES_Balanced );

        //export PDF to disk and close handle with document
        document.Export(outputPdfFilename, FileExportFormatEnum.FEF_PDF, pdfParams);
        document.Close();
    }

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  • Avatar
    Lilya Chesnova

    Hi Koen de Leijer, 

    As far as I know you have already received the answer from our technical consultant. I will duplicate this answer here too: 

    Java-documentation and samples: ABBYY SDKs does not have documentation in JavaDoc format. Documentation in PDF and HTML formats can be found in the Help subfolder of SDK’s distributive.

    All available samples can be found in "...\FineReader Engine\Samples" folder after installation with the default parameters.

    Rotation: You need to set to TRUE setting CorrectOrientation (DocumentProcessingParams -> PageProcessingParams -> PagePreprocessingParams).

    Additional settings for orientation correction are available through OrientationDetectionParams (DocumentProcessingParams -> PageProcessingParams -> PagePreprocessingParams).

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  • Avatar
    Permanently deleted user

    Hi Lilya

    Thanks !

    Both the samples and menu-options were not helpful because we use the Finereader Engine directly from Java. In FREngine11UserGuide.pdf there was a sample in C++/C# that leaded me to the following Java-statements:

            IDocumentProcessingParams dpp = engine.CreateDocumentProcessingParams();   
            dpp.getPageProcessingParams().getPagePreprocessingParams().setCorrectOrientation(true);

    Full working solution

        private final static String DLL_FOLDER = "/opt/ABBYY/FREngine11/Bin";
        private final static String DEVELOPER_SN = "SWED....................";
        private void ocrPdf(String inputPdfFilename, String outputPdfFilename) throws Exception {
            //init FREngine/IEngine with default profile
            IEngine engine = Engine.GetEngineObject(DLL_FOLDER, DEVELOPER_SN);
            engine.LoadPredefinedProfile("DocumentConversion_Accuracy");

            //create new document and insert PDF
            IFRDocument document = engine.CreateFRDocument();
            document.AddImageFile(inputPdfFilename, null, null);
           
            //enable orientation detection
            IDocumentProcessingParams dpp = engine.CreateDocumentProcessingParams();   
            dpp.getPageProcessingParams().getPagePreprocessingParams().setCorrectOrientation(true);
                   
            //process full document
            document.Process(dpp);
           
            // Save results to pdf using 'balanced' scenario
            IPDFExportParams pdfParams = engine.CreatePDFExportParams();
            pdfParams.setScenario( PDFExportScenarioEnum.PES_Balanced );

            //export PDF to disk and close handle with document
            document.Export(outputPdfFilename, FileExportFormatEnum.FEF_PDF, pdfParams);
            document.Close();
        }

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  • Avatar
    Lilya Chesnova

    Thank you for sharing this solution! 

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