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CannyEdgeDetectorCommandChannels Enumeration

Summary

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

Syntax
C#
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
ValueMemberDescription
0x00000000MasterApplies the Canny filter on the master channel
0x00000001RedApplies the Canny filter on the red channel
0x00000002GreenApplies the Canny filter on the green channel
0x00000004BlueApplies 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
C#
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

Help Version 23.0.2024.3.3
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Leadtools.ImageProcessing.Core Assembly

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© 1991-2023 LEAD Technologies, Inc. All Rights Reserved.