C# Class Accord.Imaging.Filters.Opening

Opening operator from Mathematical Morphology.

Opening morphology operator equals to erosion followed by dilatation.

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 dilatation restores big objects, which were not removed by erosion.

See documentation to Erosion and Dilatation 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:

Inheritance: IFilter, IInPlaceFilter, IInPlacePartialFilter, IFilterInformation

Show file Open project: accord-net/framework Class Usage Examples

Public Methods

Method	Description
Apply ( Bitmap image ) : Bitmap	Apply filter to an image. The method keeps the source image unchanged and returns the result of image processing filter as new image.
Apply ( BitmapData imageData ) : Bitmap	Apply filter to an image. The filter accepts bitmap data as input and returns the result of image processing filter as new image. The source image data are kept unchanged.
Apply ( UnmanagedImage image ) : UnmanagedImage	Apply filter to an image in unmanaged memory. The method keeps the source image unchanged and returns the result of image processing filter as new image.
Apply ( UnmanagedImage sourceImage, UnmanagedImage destinationImage ) : void	Apply filter to an image in unmanaged memory. The method keeps the source image unchanged and puts result of image processing into destination image. The destination image must have the same width and height as source image. Also destination image must have pixel format, which is expected by particular filter (see FormatTranslations property for information about pixel format conversions).
ApplyInPlace ( Bitmap image ) : void	Apply filter to an image. The method applies the filter directly to the provided source image.
ApplyInPlace ( Bitmap image, Rectangle rect ) : void	Apply filter to an image or its part. The method applies the filter directly to the provided source image.
ApplyInPlace ( BitmapData imageData ) : void	Apply filter to an image. The method applies the filter directly to the provided source image.
ApplyInPlace ( BitmapData imageData, Rectangle rect ) : void	Apply filter to an image or its part. The method applies the filter directly to the provided source image.
ApplyInPlace ( UnmanagedImage image ) : void	Apply filter to an unmanaged image. The method applies the filter directly to the provided source unmanaged image.
ApplyInPlace ( UnmanagedImage image, Rectangle rect ) : void	Apply filter to an unmanaged image or its part. The method applies the filter directly to the provided source image.
Opening ( ) : System	Initializes a new instance of the Opening class. Initializes new instance of the Opening class using default structuring element for both Erosion and Dilatation classes - 3x3 structuring element with all elements equal to 1.
Opening ( short se ) : System	Initializes a new instance of the Opening class. See documentation to Erosion and Dilatation classes for information about structuring element constraints.

Method Details

Apply() public method

Apply filter to an image.

The method keeps the source image unchanged and returns the result of image processing filter as new image.

Unsupported pixel format of the source image.

public Apply ( Bitmap image ) : Bitmap
image	System.Drawing.Bitmap	Source image to apply filter to.
return	System.Drawing.Bitmap

Apply() public method

Apply filter to an image.

The filter accepts bitmap data as input and returns the result of image processing filter as new image. The source image data are kept unchanged.

public Apply ( BitmapData imageData ) : Bitmap
imageData	System.Drawing.Imaging.BitmapData	Source image to apply filter to.
return	System.Drawing.Bitmap

Apply() public method

Apply filter to an image in unmanaged memory.

The method keeps the source image unchanged and returns the result of image processing filter as new image.

Unsupported pixel format of the source image.

public Apply ( UnmanagedImage image ) : UnmanagedImage
image	UnmanagedImage	Source image in unmanaged memory to apply filter to.
return	UnmanagedImage

Apply() public method

Apply filter to an image in unmanaged memory.

The method keeps the source image unchanged and puts result of image processing into destination image.

The destination image must have the same width and height as source image. Also destination image must have pixel format, which is expected by particular filter (see FormatTranslations property for information about pixel format conversions).

Unsupported pixel format of the source image. Incorrect destination pixel format. Destination image has wrong width and/or height.

public Apply ( UnmanagedImage sourceImage, UnmanagedImage destinationImage ) : void
sourceImage	UnmanagedImage	Source image in unmanaged memory to apply filter to.
destinationImage	UnmanagedImage	Destination image in unmanaged memory to put result into.
return	void

ApplyInPlace() public method

Apply filter to an image.

The method applies the filter directly to the provided source image.

Unsupported pixel format of the source image.

public ApplyInPlace ( Bitmap image ) : void
image	System.Drawing.Bitmap	Image to apply filter to.
return	void

ApplyInPlace() public method

Apply filter to an image or its part.

The method applies the filter directly to the provided source image.

Unsupported pixel format of the source image.

public ApplyInPlace ( Bitmap image, Rectangle rect ) : void
image	System.Drawing.Bitmap	Image to apply filter to.
rect	System.Drawing.Rectangle	Image rectangle for processing by the filter.
return	void

ApplyInPlace() public method

Apply filter to an image.

The method applies the filter directly to the provided source image.

Unsupported pixel format of the source image.

public ApplyInPlace ( BitmapData imageData ) : void
imageData	System.Drawing.Imaging.BitmapData	Image data to apply filter to.
return	void

ApplyInPlace() public method

Apply filter to an image or its part.

The method applies the filter directly to the provided source image.

Unsupported pixel format of the source image.

public ApplyInPlace ( BitmapData imageData, Rectangle rect ) : void
imageData	System.Drawing.Imaging.BitmapData	Image data to apply filter to.
rect	System.Drawing.Rectangle	Image rectangle for processing by the filter.
return	void

ApplyInPlace() public method

Apply filter to an unmanaged image.

The method applies the filter directly to the provided source unmanaged image.

Unsupported pixel format of the source image.

public ApplyInPlace ( UnmanagedImage image ) : void
image	UnmanagedImage	Unmanaged image to apply filter to.
return	void

ApplyInPlace() public method

Apply filter to an unmanaged image or its part.

The method applies the filter directly to the provided source image.

Unsupported pixel format of the source image.

public ApplyInPlace ( UnmanagedImage image, Rectangle rect ) : void
image	UnmanagedImage	Unmanaged image to apply filter to.
rect	System.Drawing.Rectangle	Image rectangle for processing by the filter.
return	void

Opening() public method

Initializes a new instance of the Opening class.

Initializes new instance of the Opening class using default structuring element for both Erosion and Dilatation classes - 3x3 structuring element with all elements equal to 1.

public Opening ( ) : System
return	System

Opening() public method

Initializes a new instance of the Opening class.

See documentation to Erosion and Dilatation classes for information about structuring element constraints.

public Opening ( short se ) : System
se	short	Structuring element.
return	System