C# Class Accord.Imaging.Filters.QuadrilateralTransformation

Performs quadrilateral transformation of an area in a given source image.

The class implements quadrilateral transformation algorithm, which allows to transform any quadrilateral from a given source image to a rectangular image. The idea of the algorithm is based on homogeneous transformation and its math is described by Paul Heckbert in his "Projective Mappings for Image Warping" paper.

The image processing filter accepts 8 grayscale images and 24/32 bpp color images for processing.

Sample usage:

 // define quadrilateral's corners List<IntPoint> corners = new List<IntPoint>( ); corners.Add( new IntPoint(  99,  99 ) ); corners.Add( new IntPoint( 156,  79 ) ); corners.Add( new IntPoint( 184, 126 ) ); corners.Add( new IntPoint( 122, 150 ) ); // create filter QuadrilateralTransformation filter = new QuadrilateralTransformation( corners, 200, 200 ); // apply the filter Bitmap newImage = filter.Apply( image );

Initial image:

Result image:

Inheritance: BaseTransformationFilter

Afficher le fichier Open project: accord-net/framework

Protected Properties

Свойство	Type	Description
newHeight	int
newWidth	int

Méthodes publiques

Méthode	Description
QuadrilateralTransformation ( ) : System	Initializes a new instance of the QuadrilateralTransformation class.
QuadrilateralTransformation ( List sourceQuadrilateral ) : System	Initializes a new instance of the QuadrilateralTransformation class. This constructor sets AutomaticSizeCalculaton to , which means that destination image will have width and height automatically calculated based on SourceQuadrilateral property.
QuadrilateralTransformation ( List sourceQuadrilateral, int newWidth, int newHeight ) : System	Initializes a new instance of the QuadrilateralTransformation class. This constructor sets AutomaticSizeCalculaton to , which means that destination image will have width and height as specified by user.

Méthodes protégées

Méthode	Description
CalculateNewImageSize ( UnmanagedImage sourceData ) : Size	Calculates new image size.
ProcessFilter ( UnmanagedImage sourceData, UnmanagedImage destinationData ) : void	Process the filter on the specified image.

Private Methods

Méthode	Description
CalculateDestinationSize ( ) : void

Method Details

CalculateNewImageSize() protected méthode

Calculates new image size.

Source quadrilateral was not set.

protected CalculateNewImageSize ( UnmanagedImage sourceData ) : Size
sourceData	UnmanagedImage	Source image data.
Résultat	System.Drawing.Size

ProcessFilter() protected méthode

Process the filter on the specified image.

protected ProcessFilter ( UnmanagedImage sourceData, UnmanagedImage destinationData ) : void
sourceData	UnmanagedImage	Source image data.
destinationData	UnmanagedImage	Destination image data.
Résultat	void

QuadrilateralTransformation() public méthode

Initializes a new instance of the QuadrilateralTransformation class.

public QuadrilateralTransformation ( ) : System
Résultat	System

QuadrilateralTransformation() public méthode

Initializes a new instance of the QuadrilateralTransformation class.

This constructor sets AutomaticSizeCalculaton to , which means that destination image will have width and height automatically calculated based on SourceQuadrilateral property.

public QuadrilateralTransformation ( List sourceQuadrilateral ) : System
sourceQuadrilateral	List	Corners of the source quadrilateral area.
Résultat	System

QuadrilateralTransformation() public méthode

Initializes a new instance of the QuadrilateralTransformation class.

This constructor sets AutomaticSizeCalculaton to , which means that destination image will have width and height as specified by user.

public QuadrilateralTransformation ( List sourceQuadrilateral, int newWidth, int newHeight ) : System
sourceQuadrilateral	List	Corners of the source quadrilateral area.
newWidth	int	Width of the new transformed image.
newHeight	int	Height of the new transformed image.
Résultat	System

Property Details

newHeight protected_oe property

New image height.

protected int newHeight
Résultat	int

newWidth protected_oe property

New image width.

protected int newWidth
Résultat	int