DirectionEdgeStatisticalCommand Class

Detects the variation of colors in the specified direction using statistical indices. It is similar to EdgeDetectStatisticalCommand, but this command allows you to specify the direction angle.

Object Model

Syntax

Visual Basic
C#
WinRT C#
WinRT JavaScript
C++

public class DirectionEdgeStatisticalCommand : Leadtools.ImageProcessing.RasterCommand, Leadtools.ImageProcessing.IRasterCommand

'Declaration
 
Public Class DirectionEdgeStatisticalCommand 
   Inherits Leadtools.ImageProcessing.RasterCommand
   Implements Leadtools.ImageProcessing.IRasterCommand

'Usage
 
Dim instance As DirectionEdgeStatisticalCommand

public sealed class DirectionEdgeStatisticalCommand : Leadtools.ImageProcessing.IRasterCommand

function Leadtools.ImageProcessing.Effects.DirectionEdgeStatisticalCommand()

public ref class DirectionEdgeStatisticalCommand : public Leadtools.ImageProcessing.RasterCommand, Leadtools.ImageProcessing.IRasterCommand

Remarks

The edges are detected by applying a statistical filter that analyzes the variations of colors in a specified direction around each pixel.
This command supports 12 and 16-bit grayscale and 48 and 64-bit color images. Support for 12 and 16-bit grayscale and 48 and 64-bit color images is available only in the Document/Medical toolkits.
This command does not support 32-bit grayscale images.

For more information, refer to Detecting and Enhancing Edges and Lines.

Example

Visual Basic
C#
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Public Sub DirectionEdgeStatisticalCommandExample()
   Dim codecs As New RasterCodecs()
   codecs.ThrowExceptionsOnInvalidImages = True

   Dim leadImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Master.jpg"))

   ' Prepare the command
   Dim command As DirectionEdgeStatisticalCommand = New DirectionEdgeStatisticalCommand

   command.Dimension = 15
   command.Threshold = 128
   command.Angle = 4500
   command.EdgeColor = New RasterColor(255, 255, 255)
   command.BackGroundColor = New RasterColor(0, 0, 0)
   'Find the edges in the image. 
   command.Run(leadImage)
   codecs.Save(leadImage, Path.Combine(LEAD_VARS.ImagesDir, "Result.jpg"), RasterImageFormat.Jpeg, 24)


End Sub

Public NotInheritable Class LEAD_VARS
   Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class

public void DirectionEdgeStatisticalCommandExample()
   {
      // Load an image
      RasterCodecs codecs = new RasterCodecs();
      codecs.ThrowExceptionsOnInvalidImages = true;

      RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Master.jpg"));

      // Prepare the command
      DirectionEdgeStatisticalCommand command = new DirectionEdgeStatisticalCommand();

      command.Dimension    = 15;
      command.Threshold    = 128;
      command.Angle        = 4500;
      command.EdgeColor       = new RasterColor(255, 255, 255);
      command.BackGroundColor = new RasterColor(0, 0, 0);

      //Find the edges in the image.
      command.Run(image);
      codecs.Save(image, Path.Combine(LEAD_VARS.ImagesDir, "Result.jpg"), RasterImageFormat.Jpeg, 24);

   }

static class LEAD_VARS
{
   public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}

[TestMethod]
public async Task DirectionEdgeStatisticalCommandExample()
{
   // Load an image
   RasterCodecs codecs = new RasterCodecs();
   codecs.ThrowExceptionsOnInvalidImages = true;
   // Load the image
   string srcFileName = @"Assets\Image1.cmp";
   StorageFile loadFile = await Tools.AppInstallFolder.GetFileAsync(srcFileName);
   RasterImage image = await codecs.LoadAsync(LeadStreamFactory.Create(loadFile));

   // Prepare the command
   DirectionEdgeStatisticalCommand command = new DirectionEdgeStatisticalCommand();

   command.Dimension    = 15;
   command.Threshold    = 128;
   command.Angle        = 4500;
   command.EdgeColor       = RasterColorHelper.Create(255, 255, 255);
   command.BackGroundColor = RasterColorHelper.Create(0, 0, 0);

   //Find the edges in the image.
   command.Run(image);
   //Save as BMP
   string destFileName = @"result.bmp";
   StorageFile saveFile = await Tools.AppLocalFolder.CreateFileAsync(destFileName);
   await codecs.SaveAsync(image, LeadStreamFactory.Create(saveFile), RasterImageFormat.Bmp, 24);

}

public void DirectionEdgeStatisticalCommandExample(RasterImage image, Stream outStream)
{
   // Prepare the command
   DirectionEdgeStatisticalCommand command = new DirectionEdgeStatisticalCommand();
   command.Dimension = 15;
   command.Threshold = 128;
   command.Angle = 4500;
   command.EdgeColor = new RasterColor(255, 255, 255);
   command.BackGroundColor = new RasterColor(0, 0, 0);

   //Find the edges in the image.
   command.Run(image);
   // Save result image
   RasterCodecs codecs = new RasterCodecs();
   codecs.Save(image, outStream, RasterImageFormat.Jpeg, 24);
   image.Dispose();
}

Public Sub DirectionEdgeStatisticalCommandExample(ByVal image As RasterImage, ByVal outStream As Stream)
   ' Prepare the command
   Dim command As DirectionEdgeStatisticalCommand = New DirectionEdgeStatisticalCommand()
   command.Dimension = 15
   command.Threshold = 128
   command.Angle = 4500
   command.EdgeColor = New RasterColor(255, 255, 255)
   command.BackGroundColor = New RasterColor(0, 0, 0)

   'Find the edges in the image.
   command.Run(image)
   ' Save result image
   Dim codecs As RasterCodecs = New RasterCodecs()
   codecs.Save(image, outStream, RasterImageFormat.Jpeg, 24)
   image.Dispose()
End Sub

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference