VintaSoft Imaging .NET SDK 10.1
Vintasoft.Imaging.ImageProcessing.Info Namespace / GetRotationAngleCommand Class
Members Example



In This Topic
    GetRotationAngleCommand Class
    In This Topic
    Detects rotation angle of image.
    Object Model
    GetRotationAngleCommand ClassRegionOfInterest ClassProcessingCommandResults ClassProcessingCommandResult Class
    Syntax
    'Declaration
     
    Public Class GetRotationAngleCommand 
       Inherits Vintasoft.Imaging.ImageProcessing.ProcessingCommandWithRegion
    public class GetRotationAngleCommand : Vintasoft.Imaging.ImageProcessing.ProcessingCommandWithRegion 
    public __gc class GetRotationAngleCommand : public Vintasoft.Imaging.ImageProcessing.ProcessingCommandWithRegion 
    public ref class GetRotationAngleCommand : public Vintasoft.Imaging.ImageProcessing.ProcessingCommandWithRegion 
    Example
    This example shows how to load an image from disk and detect the rotation angle of the image.
    Class GetRotationAngleCommandExample
        Public Sub ProcessImage()
            ' [ do not forget to set your image file path here! ]
            ' create an image collection
            Using images As New Vintasoft.Imaging.ImageCollection()
                ' add image to the image collection
                images.Add("Deskew.tif")
                Try
                    ' create the image processing command
                    Dim command As New Vintasoft.Imaging.ImageProcessing.Info.GetRotationAngleCommand()
                
                    ' subscribe to progress event of image processing command
                    AddHandler command.Progress, New System.EventHandler(Of Vintasoft.Imaging.ImageProcessing.ImageProcessingProgressEventArgs)(AddressOf command_Progress)
                
                    Try
                        ' for each image in image collection
                        For Each image As Vintasoft.Imaging.VintasoftImage In images
                            ' apply the image processing command to the image
                            command.ExecuteInPlace(image)
                
                            ' show result
                            System.Windows.Forms.MessageBox.Show(String.Format("Rotation angle is {0} degree.", command.Angle.ToString("f2")))
                        Next
                    Catch ex As Vintasoft.Imaging.ImageProcessing.ImageProcessingException
                        ' show error message
                        System.Windows.Forms.MessageBox.Show(ex.Message)
                        Return
                    End Try
                Finally
                    images.ClearAndDisposeItems()
                End Try
            End Using
        End Sub
                
        Private Sub command_Progress(sender As Object, e As Vintasoft.Imaging.ImageProcessing.ImageProcessingProgressEventArgs)
            ' update progress info using e.Progress property
            ' ...
                
            ' cancel execution of command using e.Cancel property if necessary
            ' ...
        End Sub
                
    End Class
    class GetRotationAngleCommandExample
    {
        public void ProcessImage()
        {
            // [ do not forget to set your image file path here! ]
            // create an image collection
            using (Vintasoft.Imaging.ImageCollection images = new Vintasoft.Imaging.ImageCollection())
            {
                // add image to the image collection
                images.Add("Deskew.tif");
                try
                {
                    // create the image processing command
                    Vintasoft.Imaging.ImageProcessing.Info.GetRotationAngleCommand command =
                        new Vintasoft.Imaging.ImageProcessing.Info.GetRotationAngleCommand();
                
                    // subscribe to progress event of image processing command
                    command.Progress +=
                        new System.EventHandler<Vintasoft.Imaging.ImageProcessing.ImageProcessingProgressEventArgs>(command_Progress);
                
                    try
                    {
                        // for each image in image collection
                        foreach (Vintasoft.Imaging.VintasoftImage image in images)
                        {
                            // apply the image processing command to the image
                            command.ExecuteInPlace(image);
                
                            // show result
                            System.Windows.Forms.MessageBox.Show(string.Format("Rotation angle is {0} degree.", command.Angle.ToString("f2")));
                        }
                    }
                    catch (Vintasoft.Imaging.ImageProcessing.ImageProcessingException ex)
                    {
                        // show error message
                        System.Windows.Forms.MessageBox.Show(ex.Message);
                        return;
                    }
                }
                finally
                {
                    images.ClearAndDisposeItems();
                }
            }
        }
                
        void command_Progress(object sender, Vintasoft.Imaging.ImageProcessing.ImageProcessingProgressEventArgs e)
        {
            // update progress info using e.Progress property
            // ...
                
            // cancel execution of command using e.Cancel property if necessary
            // ...
        }
                
    }
    Inheritance Hierarchy

    System.Object
       Vintasoft.Imaging.ImageProcessing.ProcessingCommandBase
          Vintasoft.Imaging.ImageProcessing.ProcessingCommandWithRegion
             Vintasoft.Imaging.ImageProcessing.Info.GetRotationAngleCommand

    Requirements

    Target Platforms: .NET 5; .NET Core 3.1; .NET Framework 4.8, 4.7, 4.6, 4.5, 4.0, 3.5

    See Also