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DirectionEdgeStatisticalCommand Constructor(int,int,int,RasterColor,RasterColor)

Summary

Initializes a new DirectionEdgeStatisticalCommand class object with explicit parameters.

Syntax
C#
VB
Objective-C
C++
Java
Public Function New( _ 
   ByVal dimension As Integer, _ 
   ByVal threshold As Integer, _ 
   ByVal angle As Integer, _ 
   ByVal edgeColor As RasterColor, _ 
   ByVal backGroundColor As RasterColor _ 
) 
- (instancetype)initWithDimension:(NSUInteger)dimension 
                        threshold:(NSInteger)threshold 
                            angle:(NSInteger)angle 
                        edgeColor:(LTRasterColor *)edgeColor 
                  backgroundColor:(LTRasterColor *)backgroundColor 
public DirectionEdgeStatisticalCommand( 
   int dimension,  
   int threshold,  
   int angle,  
   RasterColor edgeColor,  
   RasterColor backGroundColor 
) 
public: 
DirectionEdgeStatisticalCommand(  
   int dimension, 
   int threshold, 
   int angle, 
   RasterColor edgeColor, 
   RasterColor backGroundColor 
) 

Parameters

dimension
The dimension or the number of pixels used to calculate the edge in the specified direction, This parameter only accepts positive values.

threshold
Threshold value used to determine which pixels are edge pixels. If the difference in the intensity value between the pixel being tested and the average intensity of the pixels in the area specified in the dimension parameter around it is greater than this value, the pixel is an edge pixel. The threshold range for the 16, 48, and 64-bit images is from 0 to 65535 and for 12-bit images from 0 to 4095. Otherwise, it is from 0 to 255. The threshold is applied on channels separately.

angle
Value that represents the edge detector direction, in hundredths of degrees. Valid values range from -18000 through 18000. Positive values are produced by counterclockwise rotation above the horizon and negative values are produced by clockwise rotation below the horizon. This value is divided internally by 100.

edgeColor
Edge color.

backGroundColor
Non edge color.

Example

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

C#
VB
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Effects; 
 
public void DirectionEdgeStatisticalConstructorExample() 
{ 
   // 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(20, 128, 3000, new RasterColor(255, 255, 255), 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 DirectionEdgeStatisticalConstructorExample() 
   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(20, 128, 3000, New RasterColor(255, 255, 255), 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 DirectionEdgeStatisticalConstructorExample(RasterImage image, Stream outStream) 
{ 
   // Prepare the command 
   DirectionEdgeStatisticalCommand command = new DirectionEdgeStatisticalCommand(20, 128, 3000, new RasterColor(255, 255, 255), 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 DirectionEdgeStatisticalConstructorExample(ByVal image As RasterImage, ByVal outStream As Stream) 
   ' Prepare the command 
   Dim command As DirectionEdgeStatisticalCommand = New DirectionEdgeStatisticalCommand(20, 128, 3000, New RasterColor(255, 255, 255), 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

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Leadtools.ImageProcessing.Effects Assembly