GetRegion Method

public RasterRegion GetRegion( 
   RasterRegionXForm xform
)

'Declaration
 

Public Function GetRegion( _
   ByVal xform As RasterRegionXForm _
) As RasterRegion

'Usage
 

Dim instance As RasterImage
Dim xform As RasterRegionXForm
Dim value As RasterRegion
 
value = instance.GetRegion(xform)

public RasterRegion GetRegion( 
   RasterRegionXForm xform
)

- (nullable LTRasterRegion *)getRegion:(nullable LTRasterRegionXForm *)xform error:(NSError **)error

public RasterRegion getRegion(RasterRegionXForm xform)

 function Leadtools.RasterImage.GetRegion( 
   xform 
)

public:
RasterRegion^ GetRegion( 
   RasterRegionXForm^ xform
) 

Parameters

xform

RasterRegionXForm object that LEADTOOLS uses to translate between display coordinates and image coordinates. If you specify null for this parameter, the scalar fields default to 1, the offsets default to 0, and the view perspective defaults to the image view perspective.

Return Value

To set or updated the RasterRegion object that describes the current image region, use SetRegion.

If the image does not have a region, this method will return an empty RasterRegion object.

The RasterRegion class provides a platform independent representation of a region of interest in an image that can be used in any platform supported by LEADTOOLS such as GDI, GDI+, WPF and Silverlight. The RasterRegion class contains extensive methods and properties to manipulate the region data and save/load it to a byte array.

To convert a LEADTOOLS RasterRegion object to/from a device dependent region, you can use the following helper classes:

• Leadtools.Drawing.RasterRegionConverter to convert to/from a System.Drawing (GDI+) System.Drawing.Region or Windows HRGN objects.
• Leadtools.Windows.Media.RasterRegionConverter to convert to/from a WPF and Silverlight System.Windows.Media.Geometry object.

The RasterRegion class implements the IDisposable interface, so you must call Dispose on any region objects you create after using it.

For more information, refer to Creating a Region.

For more information, refer to Saving A Region.

For more information, refer to Working with the Existing Region.

Target Platforms

Reference

RasterImage Class
RasterImage Members