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BinaryDilation3x3 Class
Binary dilation operator from Mathematical Morphology with 3x3 structuring element.
Inheritance Hierarchy
SystemObject
  Accord.Imaging.FiltersBaseUsingCopyPartialFilter
    Accord.Imaging.FiltersBinaryDilation3x3

Namespace:  Accord.Imaging.Filters
Assembly:  Accord.Imaging (in Accord.Imaging.dll) Version: 3.8.0
Syntax
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public class BinaryDilation3x3 : BaseUsingCopyPartialFilter
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The BinaryDilation3x3 type exposes the following members.

Constructors
  NameDescription
Public methodBinaryDilation3x3
Initializes a new instance of the BinaryDilation3x3 class.
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Properties
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.)
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 BaseUsingCopyPartialFilterProcessFilter(UnmanagedImage, UnmanagedImage, Rectangle).)
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 MethodTo(Type)Overloaded.
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 ExtensionMethods.)
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Remarks

The filter represents an optimized version of Dilation filter, which is aimed for binary images (containing black and white pixels) processed with 3x3 structuring element. This makes this filter ideal for growing objects in binary images – it puts white pixel to the destination image in the case if there is at least one white neighbouring pixel in the source image.

See Dilation filter, which represents generic version of dilation filter supporting custom structuring elements and wider range of image formats.

The filter accepts 8 bpp grayscale (binary) images for processing.

Examples
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// Let's start with one of the default 
// color test images in the framework:
var test = new TestImages(basePath);

// Let's get Lena's picture
Bitmap bmp = test["lena.bmp"];

// And transform it to a binary mask 
// using Niblack's threshold class
var niblack = new NiblackThreshold();
Bitmap binary = niblack.Apply(bmp);

// The result can be seen below:
// ImageBox.Show(binary);

// Now, let's finally apply the dilation 
// filter to the binarized image below:
var dil3x3 = new BinaryDilation3x3();
Bitmap result = dil3x3.Apply(binary);

// The result can be seen below:
// ImageBox.Show(result);

Binarized image:

Result image:

See Also