Identify and recognize a document that contains completed form with barcodes

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If you want to identify and recognize document that contains completed form with barcodes, you need to do the following steps:

Identify a template for completed form
Recognize field values in completed form

Here is C#/VB.NET code that demonstrates how to identify and recognize a complteted form that contains barcodes.

/// <summary>
/// Recognizes the form with barcode fields.
/// </summary>
/// <param name="formRecognitionManager">The form recognition manager.</param>
/// <param name="image">The image.</param>
/// <remarks>
/// The BarcodeField and BarcodeFieldTemplate classes are available
/// in the VintaSoft Forms Processing Demo source codes.
/// </remarks>
public static void RecognizeFormWithBarcodeFields(
    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)
            {
                // an example of BarcodeField class implementation can be found
                // in the VintaSoft Forms Processing Demo source codes
                if (recognizedField is BarcodeField)
                {
                    BarcodeField barcodeField = (BarcodeField)recognizedField;
                    // write field info
                    System.Console.WriteLine(string.Format(
                        "  Barcode field: name: {0}; type: {1}; value: {2}; confidence: {3:F1}%",
                        barcodeField.Name,
                        barcodeField.BarcodeInfo.BarcodeType,
                        barcodeField.Value,
                        barcodeField.Confidence * 100));
                }
            }
        }
    }
}

VB.NET

''' <summary>
''' Recognizes the form with barcode fields.
''' </summary>
''' <param name="formRecognitionManager">The form recognition manager.</param>
''' <param name="image">The image.</param>
''' <remarks>
''' The BarcodeField and BarcodeFieldTemplate classes are available
''' in the VintaSoft Forms Processing Demo source codes.
''' </remarks>
Public Shared Sub RecognizeFormWithBarcodeFields(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
                ' an example of BarcodeField class implementation can be found
                ' in the VintaSoft Forms Processing Demo source codes
                If TypeOf recognizedField Is BarcodeField Then
                    Dim barcodeField As BarcodeField = DirectCast(recognizedField, BarcodeField)
                    ' write field info
                    System.Console.WriteLine(String.Format("  Barcode field: name: {0}; type: {1}; value: {2}; confidence: {3:F1}%", barcodeField.Name, barcodeField.BarcodeInfo.BarcodeType, barcodeField.Value, barcodeField.Confidence * 100))
                End If
            Next
        End If
    End If
End Sub

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