DirectionEdgeStatisticalCommand Class

Summary

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.

Syntax

Objective-C

C++

Java

public class DirectionEdgeStatisticalCommand : RasterCommand

Public Class DirectionEdgeStatisticalCommand  
   Inherits RasterCommand

@interface LTDirectionEdgeStatisticalCommand : LTRasterCommand

public class DirectionEdgeStatisticalCommand extends RasterCommand

public ref class DirectionEdgeStatisticalCommand : public RasterCommand

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

Run the DirectionEdgeStatisticalCommand on an image, to find it is edges.

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Effects; 
 
public void DirectionEdgeStatisticalCommandExample() 
{ 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "ImageProcessingDemo\\NaturalFruits.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"; 
}

Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing.Effects 
 
Public Sub DirectionEdgeStatisticalCommandExample() 
   Dim codecs As New RasterCodecs() 
   codecs.ThrowExceptionsOnInvalidImages = True 
 
   Dim leadImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "ImageProcessingDemo\\NaturalFruits.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

c#[Silverlight C# Example] 
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Effects; 
using Leadtools.Examples; 
 
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(); 
} 
vb[Silverlight VB Example] 
Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing.Effects 
 
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