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Opening Class

Opening operator from Mathematical Morphology.
Inheritance Hierarchy
SystemObject
  Accord.Imaging.FiltersOpening

Namespace:  Accord.Imaging.Filters
Assembly:  Accord.Imaging (in Accord.Imaging.dll) Version: 3.7.0
Syntax
public class Opening : IFilter, IInPlaceFilter, 
	IInPlacePartialFilter, IFilterInformation
Request Example View Source

The Opening type exposes the following members.

Constructors
Properties
  NameDescription
Public propertyFormatTranslations
Format translations dictionary.
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Methods
  NameDescription
Public methodApply(Bitmap)
Apply filter to an image.
Public methodApply(BitmapData)
Apply filter to an image.
Public methodApply(UnmanagedImage)
Apply filter to an image in unmanaged memory.
Public methodApply(UnmanagedImage, UnmanagedImage)
Apply filter to an image in unmanaged memory.
Public methodApplyInPlace(Bitmap)
Apply filter to an image.
Public methodApplyInPlace(BitmapData)
Apply filter to an image.
Public methodApplyInPlace(UnmanagedImage)
Apply filter to an unmanaged image.
Public methodApplyInPlace(Bitmap, Rectangle)
Apply filter to an image or its part.
Public methodApplyInPlace(BitmapData, Rectangle)
Apply filter to an image or its part.
Public methodApplyInPlace(UnmanagedImage, Rectangle)
Apply filter to an unmanaged image or its part.
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.)
Public methodToString
Returns a string that represents the current object.
(Inherited from Object.)
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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 MethodIsEqual
Compares two objects for equality, performing an elementwise comparison if the elements are vectors or matrices.
(Defined by Matrix.)
Public Extension MethodToT
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.)
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Remarks

Opening morphology operator equals to erosion followed by dilation.

Applied to binary image, the filter may be used for removing small object keeping big objects unchanged. Since erosion is used first, it removes all small objects. Then dilation restores big objects, which were not removed by erosion.

See documentation to Erosion and Dilation classes for more information and list of supported pixel formats.

Sample usage:

// create filter
Opening filter = new Opening( );
// apply the filter
filter.Apply( image );

Initial image:

Result image:

See Also