C# Class ClearCanvas.ImageViewer.RoiGraphics.Roi

Represents a static region of interest for the purposes of computing statistics on the contained pixels.

Roi objects are static definitions of a region of interest on a particular image. Its shape definition and the underlying pixel values are considered fixed upon construction, and hence its various properties and statistics are non-changing.

New instances of a Roi should be constructed everytime the definition of the region of interest or the underlying image pixel data has changed. The IGraphic.GetRoi method allows client code to quickly construct a new instance of a Roi based on the current definition of the graphic and the image it currently belongs to.

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Public Methods

Method	Description
Contains ( PointF point ) : bool	Tests to see if the given point is contained within the region of interest. Regions of interest have no notion of coordinate system. All coordinates are inherently given relative to the image pixel space (i.e. CoordinateSystem.Source.)
Contains ( float x, float y ) : bool	Tests to see if the given point is contained within the region of interest. Regions of interest have no notion of coordinate system. All coordinates are inherently given relative to the image pixel space (i.e. CoordinateSystem.Source.)
Contains ( int x, int y ) : bool	Tests to see if the given point is contained within the region of interest. Regions of interest have no notion of coordinate system. All coordinates are inherently given relative to the image pixel space (i.e. CoordinateSystem.Source.)
CopyTo ( IPresentationImage presentationImage ) : Roi	Creates a copy of this Roi using the same region of interest shape but using a different image as the source pixel data.
GetBoundingBoxRounded ( bool constrainToImage ) : Rectangle	Returns a bounding box that has been rounded to the nearest whole pixel(s). Uses RectangleUtilities.RoundInflate to ensure the bounding box returned will encompass every pixel that is inside the ROI.
GetPixelCoordinates ( ) : IEnumerable	Gets an enumeration of the coordinates of points contained within the region of interest. Regions of interest have no notion of coordinate system. All coordinates are inherently given relative to the image pixel space (i.e. CoordinateSystem.Source.)
GetPixelValues ( ) : IEnumerable	Gets an enumeration of the modality LUT transformed pixel values contained within the region of interest rounded to the nearest integer. If the ModalityLut is null, then this method enumerates the same values as GetRawPixelValues.
GetRawPixelValues ( ) : IEnumerable	Gets an enumeration of the raw pixel values contained within the region of interest.

Protected Methods

Method	Description
ComputeBounds ( ) : RectangleF	Called by BoundingBox to compute the tightest bounding box of the region of interest. This method is only called once and the result is cached for future accesses. Regions of interest have no notion of coordinate system. All coordinates are inherently given relative to the image pixel space (i.e. CoordinateSystem.Source.)
ConvertFromSquarePixels ( double area, ClearCanvas.Dicom.Iod.Units units, PixelSpacing pixelSpacing ) : double	Converts an area in pixels into the given units given some particular pixel spacing.
Roi ( IPresentationImage presentationImage ) : System	Constructs a new region of interest, specifying an IPresentationImage as the source of the pixel data.
ValidateUnits ( ClearCanvas.Dicom.Iod.Units units, PixelSpacing pixelSpacing ) : bool	Checks if operations in the given units are possible with the pixelSpacing information available.

Private Methods

Method	Description
IsBoundingBoxInImage ( ) : bool	Checks whether or not the region of interest's bounding box intersects the image.

Method Details

ComputeBounds() protected abstract method

Called by BoundingBox to compute the tightest bounding box of the region of interest.

This method is only called once and the result is cached for future accesses.

Regions of interest have no notion of coordinate system. All coordinates are inherently given relative to the image pixel space (i.e. CoordinateSystem.Source.)

protected abstract ComputeBounds ( ) : RectangleF
return	System.Drawing.RectangleF

Contains() public abstract method

Tests to see if the given point is contained within the region of interest.

Regions of interest have no notion of coordinate system. All coordinates are inherently given relative to the image pixel space (i.e. CoordinateSystem.Source.)

public abstract Contains ( PointF point ) : bool
point	System.Drawing.PointF	The point to test.
return	bool

Contains() public method

Tests to see if the given point is contained within the region of interest.

Regions of interest have no notion of coordinate system. All coordinates are inherently given relative to the image pixel space (i.e. CoordinateSystem.Source.)

public Contains ( float x, float y ) : bool
x	float	The X-coordinate of the point to test.
y	float	The Y-coordinate of the point to test.
return	bool

Contains() public method

Tests to see if the given point is contained within the region of interest.

Regions of interest have no notion of coordinate system. All coordinates are inherently given relative to the image pixel space (i.e. CoordinateSystem.Source.)

public Contains ( int x, int y ) : bool
x	int	The X-coordinate of the point to test.
y	int	The Y-coordinate of the point to test.
return	bool

ConvertFromSquarePixels() protected static method

Converts an area in pixels into the given units given some particular pixel spacing.

Thrown if is a physical unit of measurement and is not calibrated.

protected static ConvertFromSquarePixels ( double area, ClearCanvas.Dicom.Iod.Units units, PixelSpacing pixelSpacing ) : double
area	double	The area of pixels to be converted.
units	ClearCanvas.Dicom.Iod.Units	The units into which the area should be converted.
pixelSpacing	PixelSpacing	The pixel spacing information available.
return	double

CopyTo() public abstract method

Creates a copy of this Roi using the same region of interest shape but using a different image as the source pixel data.

public abstract CopyTo ( IPresentationImage presentationImage ) : Roi
presentationImage	IPresentationImage	The image upon which to copy this region of interest.
return	Roi

GetBoundingBoxRounded() public method

Returns a bounding box that has been rounded to the nearest whole pixel(s).

Uses RectangleUtilities.RoundInflate to ensure the bounding box returned will encompass every pixel that is inside the ROI.

public GetBoundingBoxRounded ( bool constrainToImage ) : Rectangle
constrainToImage	bool	Whether or not the returned rectangle should also be constrained to the image bounds.
return	System.Drawing.Rectangle

GetPixelCoordinates() public method

Gets an enumeration of the coordinates of points contained within the region of interest.

Regions of interest have no notion of coordinate system. All coordinates are inherently given relative to the image pixel space (i.e. CoordinateSystem.Source.)

public GetPixelCoordinates ( ) : IEnumerable
return	IEnumerable

GetPixelValues() public method

Gets an enumeration of the modality LUT transformed pixel values contained within the region of interest rounded to the nearest integer.

If the ModalityLut is null, then this method enumerates the same values as GetRawPixelValues.

public GetPixelValues ( ) : IEnumerable
return	IEnumerable

GetRawPixelValues() public method

Gets an enumeration of the raw pixel values contained within the region of interest.

public GetRawPixelValues ( ) : IEnumerable
return	IEnumerable

Roi() protected method

Constructs a new region of interest, specifying an IPresentationImage as the source of the pixel data.

protected Roi ( IPresentationImage presentationImage ) : System
presentationImage	IPresentationImage	The image containing the source pixel data.
return	System

ValidateUnits() protected static method

Checks if operations in the given units are possible with the pixelSpacing information available.

protected static ValidateUnits ( ClearCanvas.Dicom.Iod.Units units, PixelSpacing pixelSpacing ) : bool
units	ClearCanvas.Dicom.Iod.Units
pixelSpacing	PixelSpacing
return	bool