WCUnion.h
Classes
- WCUnion -- Make the union of 2 or more image regions. (full description)
Interface
- Public Members
- WCUnion (const ImageRegion& region1, const ImageRegion& region2)
- WCUnion (const ImageRegion* region1, const ImageRegion* region2 = 0, const ImageRegion* region3 = 0, const ImageRegion* region4 = 0, const ImageRegion* region5 = 0, const ImageRegion* region6 = 0, const ImageRegion* region7 = 0, const ImageRegion* region8 = 0, const ImageRegion* region9 = 0, const ImageRegion* region10 = 0)
- WCUnion (const PtrBlock<const ImageRegion*>& regions)
- WCUnion (Bool takeOver, const PtrBlock<const WCRegion*>& regions)
- WCUnion (const WCUnion& other)
- virtual ~WCUnion()
- WCUnion& operator= (const WCUnion& other)
- virtual Bool operator== (const WCRegion& other) const
- virtual WCRegion* cloneRegion() const
- static String className()
- virtual String type() const
- virtual TableRecord toRecord (const String& tableName) const
- static WCUnion* fromRecord (const TableRecord&, const String& tableName)
- Protected Members
- virtual LCRegion* doToLCRegion (const CoordinateSystem& cSys, const IPosition& shape, const IPosition& pixelAxesMap, const IPosition& outOrder) const
Prerequisite
Synopsis
The WCUnion class is a specialization of class
WCCompound.
It makes it possible to take the union of 2 or more image regions.
Note that only world coordinate regions can be used in a compound,
thus an LCSlicer object is not allowed in a union.
The union of regions is the collection of the pixels masked-on
in any region.
Note that the bounding box of a union is determined by the outermost
pixels. It means that if regions are very far apart, the bounding
box of the union is very large and therefore inefficient.
The regions in a union can have different axes and dimensionalities.
The axes and dimensionality of a union are determined by the
collection of all different axes in its regions. Each individual region
will be auto-extended along the axes not being part of the region.
E.g. one can define a WCBox with axis RA and another WCBox with
axis DEC. The union will be 2-dim with axes RA and DEC. The first
box will be auto-extended to cover the DEC axis, which results
in a 2-dim box with its DEC axis the length of the image's DEC axis.
Similarly the second box will be auto-extended to cover the RA axis.
Example
Member Description
Construct the union of one or more image regions.
The image regions have to contain WCRegion objects, otherwise an
exception is thrown.
Construct from multiple regions given as a Block.
When takeOver is True, the destructor will delete the
given regions. Otherwise a copy of the regions is made.
WCUnion (const WCUnion& other)
Copy constructor (copy semantics).
WCUnion& operator= (const WCUnion& other)
Assignment (copy semantics).
Comparison
Make a copy of the derived object.
Get the class name (to store in the record).
Get the region type. Returns className()
Convert the (derived) object to a record.
Convert correct object from a record.
Convert to an LCRegion using the given coordinate system and shape.
pixelAxesMap(i) gives the pixel axis in cSys of axes i
in the axesDesc.