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Accord.NET (logo) KirschEdgeDetector Class
Kirsch's Edge Detector
Inheritance Hierarchy
SystemObject
  Accord.Imaging.FiltersBaseFilter
    Accord.Imaging.FiltersKirschEdgeDetector

Namespace:  Accord.Imaging.Filters
Assembly:  Accord.Imaging (in Accord.Imaging.dll) Version: 3.4.0
Syntax
public class KirschEdgeDetector : BaseFilter
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The KirschEdgeDetector type exposes the following members.

Constructors
  NameDescription
Public methodKirschEdgeDetector
Initializes a new instance of the KirschEdgeDetector class.
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Properties
Methods
  NameDescription
Public methodApply(Bitmap)
Apply filter to an image.
(Inherited from BaseFilter.)
Public methodApply(BitmapData)
Apply filter to an image.
(Inherited from BaseFilter.)
Public methodApply(UnmanagedImage)
Apply filter to an image in unmanaged memory.
(Inherited from BaseFilter.)
Public methodApply(UnmanagedImage, UnmanagedImage)
Apply filter to an image in unmanaged memory.
(Inherited from BaseFilter.)
Public methodEquals
Determines whether the specified object is equal to the current object.
(Inherited from Object.)
Protected methodFinalize
Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.
(Inherited from Object.)
Public methodGetHashCode
Serves as the default hash function.
(Inherited from Object.)
Public methodGetType
Gets the Type of the current instance.
(Inherited from Object.)
Protected methodMemberwiseClone
Creates a shallow copy of the current Object.
(Inherited from Object.)
Protected methodProcessFilter
Process the filter on the specified image.
(Overrides BaseFilterProcessFilter(UnmanagedImage, UnmanagedImage).)
Public methodToString
Returns a string that represents the current object.
(Inherited from Object.)
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Fields
  NameDescription
Public fieldStatic memberEast
Gets the East direction Kirsch kernel mask.
Public fieldStatic memberNorth
Gets the North direction Kirsch kernel mask.
Public fieldStatic memberNortheast
Gets the Northeast direction Kirsch kernel mask.
Public fieldStatic memberNorthwest
Gets the Northwest direction Kirsch kernel mask.
Public fieldStatic memberSouth
Gets the South direction Kirsch kernel mask.
Public fieldStatic memberSoutheast
Gets the Southeast direction Kirsch kernel mask.
Public fieldStatic memberSouthwest
Gets the Southwest direction Kirsch kernel mask.
Public fieldStatic memberWest
Gets the West direction Kirsch kernel mask.
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Extension Methods
  NameDescription
Public Extension MethodHasMethod
Checks whether an object implements a method with the given name.
(Defined by ExtensionMethods.)
Public Extension MethodToTOverloaded.
Converts an object into another type, irrespective of whether the conversion can be done at compile time or not. This can be used to convert generic types to numeric types during runtime.
(Defined by ExtensionMethods.)
Public Extension MethodToTOverloaded.
Converts an object into another type, irrespective of whether the conversion can be done at compile time or not. This can be used to convert generic types to numeric types during runtime.
(Defined by Matrix.)
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Remarks

The Kirsch operator or Kirsch compass kernel is a non-linear edge detector that finds the maximum edge strength in a few predetermined directions. It is named after the computer scientist Russell A. Kirsch.

References:

  • Wikipedia contributors. "Kirsch operator." Wikipedia, The Free Encyclopedia. Wikipedia, The Free Encyclopedia. Available at http://en.wikipedia.org/wiki/Kirsch_operator

Examples
Bitmap image = ... // Lena's picture

// Create a new Kirsch's edge detector:
var kirsch = new KirschEdgeDetector();

// Compute the image edges
Bitmap edges = kirsch.Apply(image);

// Show on screen
ImageBox.Show(edges);

The resulting image is shown below:

See Also