VintaSoft Imaging .NET SDK 15.1: 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 filled form in an 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 filled form in an 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 10; .NET 9; .NET 8; .NET 7; .NET 6; .NET Framework 4.8, 4.7, 4.6, 4.5, 4.0, 3.5

See Also