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Accord.NET (logo) Mean Class
Mean filter.
Inheritance Hierarchy
SystemObject
  Accord.Imaging.FiltersBaseUsingCopyPartialFilter
    Accord.Imaging.FiltersConvolution
      Accord.Imaging.FiltersMean

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

Constructors
  NameDescription
Public methodMean
Initializes a new instance of the Mean class.
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Properties
  NameDescription
Public propertyDivisor
Division factor.
(Inherited from Convolution.)
Public propertyDynamicDivisorForEdges
Use dynamic divisor for edges or not.
(Inherited from Convolution.)
Public propertyFormatTranslations
Format translations dictionary.
(Inherited from Convolution.)
Public propertyKernel
Convolution kernel.
(Inherited from Convolution.)
Public propertyProcessAlpha
Specifies if alpha channel must be processed or just copied.
(Inherited from Convolution.)
Public propertyThreshold
Threshold to add to weighted sum.
(Inherited from Convolution.)
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Methods
  NameDescription
Public methodApply(Bitmap)
Apply filter to an image.
(Inherited from BaseUsingCopyPartialFilter.)
Public methodApply(BitmapData)
Apply filter to an image.
(Inherited from BaseUsingCopyPartialFilter.)
Public methodApply(UnmanagedImage)
Apply filter to an image in unmanaged memory.
(Inherited from BaseUsingCopyPartialFilter.)
Public methodApply(UnmanagedImage, UnmanagedImage)
Apply filter to an image in unmanaged memory.
(Inherited from BaseUsingCopyPartialFilter.)
Public methodApplyInPlace(Bitmap)
Apply filter to an image.
(Inherited from BaseUsingCopyPartialFilter.)
Public methodApplyInPlace(BitmapData)
Apply filter to an image.
(Inherited from BaseUsingCopyPartialFilter.)
Public methodApplyInPlace(UnmanagedImage)
Apply filter to an unmanaged image.
(Inherited from BaseUsingCopyPartialFilter.)
Public methodApplyInPlace(Bitmap, Rectangle)
Apply filter to an image or its part.
(Inherited from BaseUsingCopyPartialFilter.)
Public methodApplyInPlace(BitmapData, Rectangle)
Apply filter to an image or its part.
(Inherited from BaseUsingCopyPartialFilter.)
Public methodApplyInPlace(UnmanagedImage, Rectangle)
Apply filter to an unmanaged image or its part.
(Inherited from BaseUsingCopyPartialFilter.)
Public methodEquals
Determines whether the specified object is equal to the current object.
(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.)
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 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 filter performs each pixel value's averaging with its 8 neighbors, which is convolution filter using the mean kernel:

1  1  1
1  1  1
1  1  1

For the list of supported pixel formats, see the documentation to Convolution filter.

With the above kernel the convolution filter is just calculates each pixel's value in result image as average of 9 corresponding pixels in the source image.

Note Note
By default this filter sets ProcessAlpha property to , so the alpha channel of 32 bpp and 64 bpp images is blurred as well.

Sample usage:

// create filter
Mean filter = new Mean( );
// apply the filter
filter.ApplyInPlace( image );

Initial image:

Result image:

See Also