CannyEdgeDetectorCommandChannels Enumeration

Summary

Enumerator for selecting the channel on which the Canny Edge Detector filter is applied.

Syntax

Objective-C

C++/CLI

Java

Python

[FlagsAttribute()] 
public enum CannyEdgeDetectorCommandChannels

typedef NS_ENUM(NSUInteger, LTCannyEdgeDetectorCommandChannels) { 
 LTCannyEdgeDetectorCommandChannelsMaster = 0, //CANNY_MASTER_CHANNEL,  
 LTCannyEdgeDetectorCommandChannelsRed = 1, //CANNY_RED_CHANNEL,  
 LTCannyEdgeDetectorCommandChannelsGreen = 2, //CANNY_GREEN_CHANNEL,  
 LTCannyEdgeDetectorCommandChannelsBlue = 4, //CANNY_BLUE_CHANNEL,  
};

public final class CannyEdgeDetectorCommandChannels 
    extends java.lang.Enum<CannyEdgeDetectorCommandChannels>

public: 
   [FlagsAttribute] 
   enum class CannyEdgeDetectorCommandChannels sealed

class CannyEdgeDetectorCommandChannels(Enum): 
   Master = 0 
   Red = 1 
   Green = 2 
   Blue = 4

Members

Value	Member	Description
0x00000000	Master	Applies the Canny filter on the master channel
0x00000001	Red	Applies the Canny filter on the red channel
0x00000002	Green	Applies the Canny filter on the green channel
0x00000004	Blue	Applies the Canny filter on the blue channel

Remarks

The Canny filter can only be applied on the master channel if the image is gray. The function returns ERROR_INV_PARAMETER if the image is gray and one of the channels selected is a colored channel.

It is possible to select more than one channel from the colored (Red, Green, Blue) channels.

Example

Java

using Leadtools; 
using Leadtools.Codecs; 
 
using Leadtools.ImageProcessing.Core; 
 
public void CannyEdgeDetectorCommandExample()  
{      
       
   RasterCodecs codecs = new RasterCodecs(); 
       
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "cannon.jpg"), 0, CodecsLoadByteOrder.Bgr, 1, 1); 
   CannyEdgeDetectorCommand Canny = new CannyEdgeDetectorCommand(); 
   Canny.Radius = 1; 
   Canny.LowThreshold = 2; 
   Canny.HighThreshold = 5; 
   Canny.Channels = CannyEdgeDetectorCommandChannels.Master; 
   Canny.Run(image); 
   codecs.Save(image, Path.Combine(LEAD_VARS.ImagesDir, "cannon_Canny.bmp"), Leadtools.RasterImageFormat.Bmp, 24, 1, 1, 1, Leadtools.Codecs.CodecsSavePageMode.Overwrite); 
 
   image.Dispose(); 
   codecs.Dispose(); 
       
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
}

 
import java.io.File; 
import java.io.IOException; 
 
import org.junit.*; 
import org.junit.Test; 
import org.junit.runner.JUnitCore; 
import org.junit.runner.Result; 
import org.junit.runner.notification.Failure; 
import static org.junit.Assert.*; 
 
import leadtools.*; 
import leadtools.codecs.*; 
import leadtools.imageprocessing.core.CannyEdgeDetectorCommand; 
 
 
public void cannyEdgeDetectorCommandExample() { 
 
    RasterCodecs codecs = new RasterCodecs(); 
 
    final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
    RasterImage image = codecs.load(combine(LEAD_VARS_IMAGES_DIR, "cannon.jpg"), 0, CodecsLoadByteOrder.BGR, 1, 1); 
    CannyEdgeDetectorCommand canny = new CannyEdgeDetectorCommand(); 
    canny.setRadius(1); 
    canny.setLowThreshold(2); 
    canny.setHighThreshold(5); 
    canny.run(image); 
    codecs.save(image, combine(LEAD_VARS_IMAGES_DIR, "cannon_Canny.bmp"), RasterImageFormat.BMP, 24, 1, 1, 1, 
            CodecsSavePageMode.OVERWRITE); 
 
    image.dispose(); 
    codecs.dispose(); 
 
    assertTrue(new File(combine(LEAD_VARS_IMAGES_DIR, "cannon_Canny.bmp")).exists()); 
    System.out.println("Command run and file exported to: " + combine(LEAD_VARS_IMAGES_DIR, "cannon_Canny.bmp")); 
 
}

Requirements

Target Platforms

Reference

Leadtools.ImageProcessing.Core Namespace

CannyEdgeDetectorCommand Class

CannyEdgeDetectorCommand Members

CannyEdgeDetectorCommand-Channels

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Help Version 23.0.2024.3.3

Leadtools.ImageProcessing.Core Assembly

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Leadtools.ImageProcessing.Core Namespace

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