C# Class AForge.Imaging.Filters.Erosion

Erosion operator from Mathematical Morphology.

The filter assigns minimum value of surrounding pixels to each pixel of the result image. Surrounding pixels, which should be processed, are specified by structuring element: 1 - to process the neighbor, -1 - to skip it.

The filter especially useful for binary image processing, where it removes pixels, which are not surrounded by specified amount of neighbors. It gives ability to remove noisy pixels (stand-alone pixels) or shrink objects.

For processing image with 3x3 structuring element, there are different optimizations available, like Erosion3x3 and BinaryErosion3x3.

The filter accepts 8 and 16 bpp grayscale images and 24 and 48 bpp color images for processing.

Sample usage:

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

Initial image:

Result image:

Inheritance: BaseUsingCopyPartialFilter

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Méthodes publiques

Méthode	Description
Erosion ( ) : System	Initializes a new instance of the Erosion class. Initializes new instance of the Erosion class using default structuring element - 3x3 structuring element with all elements equal to 1.
Erosion ( short se ) : System	Initializes a new instance of the Erosion class. Structuring elemement for the erosion morphological operator must be square matrix with odd size in the range of [3, 99].

Méthodes protégées

Méthode	Description
ProcessFilter ( UnmanagedImage sourceData, UnmanagedImage destinationData, Rectangle rect ) : void	Process the filter on the specified image.

Method Details

Erosion() public méthode

Initializes a new instance of the Erosion class.

Initializes new instance of the Erosion class using default structuring element - 3x3 structuring element with all elements equal to 1.

public Erosion ( ) : System
Résultat	System

Erosion() public méthode

Initializes a new instance of the Erosion class.

Structuring elemement for the erosion morphological operator must be square matrix with odd size in the range of [3, 99].

Invalid size of structuring element.

public Erosion ( short se ) : System
se	short	Structuring element.
Résultat	System

ProcessFilter() protected méthode

Process the filter on the specified image.

protected ProcessFilter ( UnmanagedImage sourceData, UnmanagedImage destinationData, Rectangle rect ) : void
sourceData	UnmanagedImage	Source image data.
destinationData	UnmanagedImage	Destination image data.
rect	System.Drawing.Rectangle	Image rectangle for processing by the filter.
Résultat	void