LeadTools答题卡识别方案

 /// <summary>
        /// 批改操作
        /// </summary>
        public AnswerCard DoCorrect(Stream AnserCardFile)
        {
            AnswerCard anserCard=new AnswerCard();
            try
            {
                //RasterImage crrentImages;
                // Create the Auto Forms Engine
                AutoFormsEngine autoEngine;
                RasterCodecs formsCodec=new RasterCodecs();
                //Create a collection of OCR Engines
                IOcrEngine ocrEngine;
                //Create the repository of master forms
                DiskMasterFormsRepository formsRepository;
                //Create an OCR Engine
                using (ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Advantage, false))
                {
                   
                    ocrEngine.Startup(formsCodec, null,null, null);

                   
                    // Load the first page as RasterImage 
                    RasterImage rasterImage = formsCodec.Load(AnserCardFile);
                    //ocrEngine.CreatePage(rasterImage, OcrImageSharingMode.AutoDispose);
                    // Create an OCR page from this image, transform ownership of the RasterImage object 
                    //using (IOcrPage ocrPage = ocrEngine.CreatePage(rasterImage, OcrImageSharingMode.AutoDispose))
                    //{
                    // Auto-preprocess it
                    //ocrPage.AutoPreprocess(OcrAutoPreprocessPageCommand.All, null);

                    // Create an OCR document
                    using (IOcrDocument ocrDocument = ocrEngine.DocumentManager.CreateDocument())
                        {
                        // Add this image to the document
                         IOcrPage ocrPage = ocrDocument.Pages.AddPage(rasterImage, null);
                        BarcodeEngine barcodeEngine = new BarcodeEngine();
                        // Auto-preprocess it
                        ocrPage.AutoPreprocess(OcrAutoPreprocessPageCommand.All, null);
                        // Point repository to directory with existing master forms 
                        formsRepository = new DiskMasterFormsRepository(formsCodec, masterFormsFolder);
                        autoEngine = new AutoFormsEngine(formsRepository, ocrEngine, null, AutoFormsRecognitionManager.Default | AutoFormsRecognitionManager.Ocr, 30, 80, true);
                        // Recognize (Classify) the form
                        AutoFormsRunResult runResult = autoEngine.Run(ocrPage.GetRasterImage(OcrPageType.Current), null, null, null);
                        //AutoFormsRunResult runResult = autoEngine.Run(rasterImage, null, null, null);
                        //AutoFormsRunResult runResult = autoEngine.Run(AnserCardFile, null);
                        if (runResult != null)
                        {
                            //Recognition was successful
                            anserCard = AnswerHandle(runResult);
                        }
                    }
                    autoEngine.Dispose();
                    formsCodec.Dispose();
                    //rasterImage.Dispose();
                    if (ocrEngine != null && ocrEngine.IsStarted)
                        ocrEngine.Shutdown();
                }
                return anserCard;
            }
            catch (Exception ex)
            {
                return null;
            }
        }

 校正方案可使用

  private void DoDeskew(IOcrEngine ocrEngine, string Filename, string Savename)
        {
            // Load the first page as RasterImage 
            RasterImage image = ocrEngine.RasterCodecsInstance.Load(Filename, 1);
            // 准备命令 
            DeskewCommand command = new DeskewCommand();
            //图像的倾斜校正 
            command.Flags = DeskewCommandFlags.DeskewImage | DeskewCommandFlags.DoNotFillExposedArea;
            command.Run(image);
            // 创建一个RasterCodecs类的新实例
            RasterCodecs codecs = new RasterCodecs();
            codecs.Options.Jpeg2000.Save.UseSopMarker =true;
            // 将图像保存
            codecs.Save(
               image,
              Savename,
            RasterImageFormat.TifLzw,
               1,
               1,
               1,
               1,
            CodecsSavePageMode.Overwrite);
            image.Dispose();
            codecs.Dispose();
        }