visionpro字符识别

【核心代码】

 CogImage8Grey aImage = (CogImage8Grey)aImageFile[0];

      aImageFile.Close();

      // Define an appropriate region of interest ...
      CogRectangleAffine aROI = new CogRectangleAffine();
      aROI.SetOriginLengthsRotationSkew(340, 748, 1010, 93, 0, 0);

      // Create a CogOCRMaxTool ...
      mTool = new CogOCRMaxTool();

      // Start to configure the tool ...
      mTool.InputImage = aImage;
      mTool.Region = aROI;

      // Initially, run just the tool's segmenter. We'll use
      // segmentation results to populate a font object for
      // use by the classifier ...
      CogOCRMaxSegmenterParagraphResult aSegmenterParagraphResult = null;
      try
        {
        aSegmenterParagraphResult = mTool.Segmenter.Execute(aImage, aROI);
        }
      catch (Exception aX)
        {
        DisplayErrorAndExit(aX.Message);
        return;
        }

      CogOCRMaxSegmenterLineResult aSegmenterLineResult =
        aSegmenterParagraphResult[0];

      // We know apriori that this image with this ROI will yield
      // segmented images of the alphabet A through Z ...
      int[] aAlphabet = new int[] {
        (int)'A', (int)'B', (int)'C', (int)'D', (int)'E', (int)'F',
        (int)'G', (int)'H', (int)'I', (int)'J', (int)'K', (int)'L',
        (int)'M', (int)'N', (int)'O', (int)'P', (int)'Q', (int)'R',
        (int)'S', (int)'T', (int)'U', (int)'V', (int)'W', (int)'X',
        (int)'Y', (int)'Z'};

      int iC = 0;
      foreach(CogOCRMaxSegmenterPositionResult aSegmenterPositionResult in
        aSegmenterLineResult)
        {
        CogOCRMaxChar aC = aSegmenterPositionResult.Character;
        aC.CharacterCode = aAlphabet[iC];
        mTool.Classifier.Font.Add(aC);
        iC ;
        } // for each(CogOCRMaxSegmenterPositionResult ...

      // Now we can train the classifier ...
      try
        {
        mTool.Classifier.Train();
        }
      catch (Exception aX)
        {
        DisplayErrorAndExit(aX.Message);
        return;
        }
      if (!mTool.Classifier.Trained)
        {
        DisplayErrorAndExit("Could not train classifier.");
        return;
        }

      // Enable the fielding
      mTool.FieldingEnabled = true;

      // Now some final form setup from the tool ...
      txtFieldString.Text = mTool.Fielding.FieldString;
      chkFieldingAliasAlpha.Checked =
        mTool.Fielding.FieldingDefinitions['A'].Enabled;
      chkFieldingAliasNumeric.Checked =
        mTool.Fielding.FieldingDefinitions['N'].Enabled;
      chkFieldingAliasAny.Checked =
        mTool.Fielding.FieldingDefinitions['*'].Enabled;
      ctrlToolDisplay.Tool = mTool;