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;
}
}

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();
}