VintaSoft Imaging .NET SDK v8.6
Vintasoft.Imaging.ImageProcessing.Color Namespace / HalftoneCommand Class
Members Example



In This Topic
    HalftoneCommand Class
    In This Topic
    Converts an image to halftone image. This class implements Floyd–Steinberg dithering algorithm.
    Object Model
    HalftoneCommand ClassProcessingCommandResults ClassProcessingCommandResult Class
    Syntax
    'Declaration
     
    Public Class HalftoneCommand 
       Inherits Vintasoft.Imaging.ImageProcessing.ProcessingCommandBase
    public __gc class HalftoneCommand : public Vintasoft.Imaging.ImageProcessing.ProcessingCommandBase 
    public ref class HalftoneCommand : public Vintasoft.Imaging.ImageProcessing.ProcessingCommandBase 
    Remarks
    The conversion will change the color resolution to 8 bpp.
    Example
    This example shows how to load an image from disk, convert colors of the image to halftones and save the result to a new image file.
    Class HalftoneCommandExample
        Public Sub ProcessImage()
            ' [ do not forget to set your image file path here! ]
            ' open an existing image
            Dim image As New Vintasoft.Imaging.VintasoftImage("Flower.jpg")
                
            ' create the command
            Dim command As New Vintasoft.Imaging.ImageProcessing.Color.HalftoneCommand()
            ' subscribe to progress event
            AddHandler command.Progress, New System.EventHandler(Of Vintasoft.Imaging.ImageProcessing.ImageProcessingProgressEventArgs)(AddressOf command_Progress)
                
            Try
                ' execute the command
                command.ExecuteInPlace(image)
            Catch ex As Vintasoft.Imaging.ImageProcessing.ImageProcessingException
                ' show error message if problem occured
                System.Windows.Forms.MessageBox.Show(ex.Message)
                Return
            End Try
                
            ' save the processed image to the new file
            image.Save("processed-image.tif")
        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 HalftoneCommandExample
    {
        public void ProcessImage()
        {
            // [ do not forget to set your image file path here! ]
            // open an existing image
            Vintasoft.Imaging.VintasoftImage image = new Vintasoft.Imaging.VintasoftImage("Flower.jpg");
                
            // create the command
            Vintasoft.Imaging.ImageProcessing.Color.HalftoneCommand command =
                new Vintasoft.Imaging.ImageProcessing.Color.HalftoneCommand();
            // subscribe to progress event
            command.Progress +=
                new System.EventHandler<Vintasoft.Imaging.ImageProcessing.ImageProcessingProgressEventArgs>(command_Progress);
                
            try
            {
                // execute the command
                command.ExecuteInPlace(image);
            }
            catch (Vintasoft.Imaging.ImageProcessing.ImageProcessingException ex)
            {
                // show error message if problem occured
                System.Windows.Forms.MessageBox.Show(ex.Message);
                return;
            }
                
            // save the processed image to the new file
            image.Save("processed-image.tif");
        }
                
        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.Color.HalftoneCommand

    Requirements

    Target Platforms: Windows 10, Windows 8, Windows 7, Windows Vista, Windows XP, Windows Server 2012, Windows Server 2008, Windows Server 2003

    See Also