VintaSoft Imaging .NET SDK 12.3: Documentation for .NET developer
Vintasoft.Imaging.FormsProcessing.FormRecognition.Omr Namespace / OmrField Class
Members Object Syntax Example Hierarchy Requirements SeeAlso
In This Topic
    OmrField Class
    In This Topic
    Provides the abstract base class that contains information about recognized OmrFieldTemplate.
    Object Model
    FormFieldTemplate OmrField
    Syntax
    Example

    This C#/VB.NET code shows how to identify and recognize a form, which contains the marks.

    
    ''' <summary>
    ''' Recognizes the form with OMR fields.
    ''' </summary>
    ''' <param name="formRecognitionManager">The form recognition manager.</param>
    ''' <param name="image">The image.</param>
    Public Shared Sub RecognizeFormWithOmrFields(formRecognitionManager As Vintasoft.Imaging.FormsProcessing.FormRecognitionManager, image As Vintasoft.Imaging.VintasoftImage)
        ' if your form template contains OCR fields,
        ' make sure OCR engine manager is initialized before recognition
        ' (otherwise recognition will return null (Nothing)),
        ' see OCR field recognition examples
    
        ' recognize the image
        Dim recognitionResult As Vintasoft.Imaging.FormsProcessing.FormRecognitionResult = formRecognitionManager.Recognize(image)
    
        ' get the result of image comparison
        Dim imageCompareResult As Vintasoft.Imaging.FormsProcessing.TemplateMatching.ImageImprintCompareResult = recognitionResult.TemplateMatchingResult.ImageCompareResult
        ' if result is not reliable
        If Not imageCompareResult.IsReliable Then
            ' matching template is not found
            System.Console.WriteLine("Matching template is not found.")
        Else
            ' get recognized page
            Dim recognizedPage As Vintasoft.Imaging.FormsProcessing.FormRecognition.FormPage = recognitionResult.RecognizedPage
            ' get form field count
            If recognizedPage.Items.Count = 0 Then
                System.Console.WriteLine("No form fields were recognized.")
            Else
                System.Console.WriteLine(String.Format("Recognized form field count: {0}", recognizedPage.Items.Count))
                ' for each recognized form field
                For Each recognizedField As Vintasoft.Imaging.FormsProcessing.FormRecognition.FormField In recognizedPage.Items
                    If TypeOf recognizedField Is Vintasoft.Imaging.FormsProcessing.FormRecognition.Omr.OmrField Then
                        Dim omrField As Vintasoft.Imaging.FormsProcessing.FormRecognition.Omr.OmrField = DirectCast(recognizedField, Vintasoft.Imaging.FormsProcessing.FormRecognition.Omr.OmrField)
                        ' write field info
                        System.Console.WriteLine(String.Format("  OMR field: name: {0}; state: {1}; confidence: {2:F1}%", omrField.Name, omrField.State, omrField.Confidence * 100))
                    End If
                Next
            End If
        End If
    End Sub
    
    
    
    /// <summary>
    /// Recognizes the form with OMR fields.
    /// </summary>
    /// <param name="formRecognitionManager">The form recognition manager.</param>
    /// <param name="image">The image.</param>
    public static void RecognizeFormWithOmrFields(
        Vintasoft.Imaging.FormsProcessing.FormRecognitionManager formRecognitionManager,
        Vintasoft.Imaging.VintasoftImage image)
    {
        // if your form template contains OCR fields,
        // make sure OCR engine manager is initialized before recognition
        // (otherwise recognition will return null (Nothing)),
        // see OCR field recognition examples
    
        // recognize the image
        Vintasoft.Imaging.FormsProcessing.FormRecognitionResult recognitionResult = 
            formRecognitionManager.Recognize(image);
    
        // get the result of image comparison
        Vintasoft.Imaging.FormsProcessing.TemplateMatching.ImageImprintCompareResult imageCompareResult =
            recognitionResult.TemplateMatchingResult.ImageCompareResult;
        // if result is not reliable
        if (!imageCompareResult.IsReliable)
        {
            // matching template is not found
            System.Console.WriteLine("Matching template is not found.");
        }
        else
        {
            // get recognized page
            Vintasoft.Imaging.FormsProcessing.FormRecognition.FormPage recognizedPage = 
                recognitionResult.RecognizedPage;
            // get form field count
            if (recognizedPage.Items.Count == 0)
            {
                System.Console.WriteLine("No form fields were recognized.");
            }
            else
            {
                System.Console.WriteLine(string.Format(
                    "Recognized form field count: {0}",
                    recognizedPage.Items.Count));
                // for each recognized form field
                foreach (Vintasoft.Imaging.FormsProcessing.FormRecognition.FormField recognizedField in recognizedPage.Items)
                {
                    if (recognizedField is Vintasoft.Imaging.FormsProcessing.FormRecognition.Omr.OmrField)
                    {
                        Vintasoft.Imaging.FormsProcessing.FormRecognition.Omr.OmrField omrField = 
                            (Vintasoft.Imaging.FormsProcessing.FormRecognition.Omr.OmrField)recognizedField;
                        // write field info
                        System.Console.WriteLine(string.Format(
                            "  OMR field: name: {0}; state: {1}; confidence: {2:F1}%",
                            omrField.Name,
                            omrField.State,
                            omrField.Confidence * 100));
                    }
                }
            }
        }
    }
    
    

    Inheritance Hierarchy
    Requirements

    Target Platforms: .NET 8; .NET 7; .NET 6; .NET Framework 4.8, 4.7, 4.6, 4.5, 4.0, 3.5

    See Also