File MultiShapeletBasis.h¶
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namespace
lsst Class for a simple mapping implementing a generic AstrometryTransform.
Remove all non-astronomical counts from the Chunk Exposure’s pixels.
Forward declarations for lsst::utils::Cache
For details on the Cache class, see the Cache.h file.
It uses a template rather than a pointer so that the derived classes can use the specifics of the transform. The class simplePolyMapping overloads a few routines.
A base class for image defects
Numeric constants used by the Integrate.h integrator routines.
Compute Image Statistics
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Gauss-Kronrod-Patterson quadrature coefficients for use in quadpack routine qng. These coefficients were calculated with 101 decimal digit arithmetic by L. W. Fullerton, Bell Labs, Nov 1981.
- Note
The Statistics class itself can only handle lsst::afw::image::MaskedImage() types. The philosophy has been to handle other types by making them look like lsst::afw::image::MaskedImage() and reusing that code. Users should have no need to instantiate a Statistics object directly, but should use the overloaded makeStatistics() factory functions.
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namespace
shapelet -
class
MultiShapeletBasis - #include <MultiShapeletBasis.h>
A basis formed from a linear combination of shapelet bases that differ only in radius.
A MultiShapeletBasis can have many “components” (shapelet bases with different orders and radii), which are mapped via matrices into one or more “elements”. It’s common for a basis to have only one or two elements, representing a galaxy model that is a linear combination of one or two radial profiles. It’s also common for most components to be zeroth order (Gaussians), as higher- order shapelet terms don’t provide much of an advantage when approximating axisymmetric functions.
MultiShapeletBasis itself provides the interface to define these multi-Gaussian approximations and combine and refine them, and delegates the work of defining them to MultiShapeletFunction (via the makeFunction() method) and the MultiShapeletMatrixBuilder class. MultiShapeletFunction is a more user-friendly and versatile approach, intended for debugging and testing, while the MultiShapletMatrixBuilder approach is intended for performance-critical evaluation of PSF-convolved MultiShapeletBasis objects.
Unnamed Group
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Iterator
begin() const Iterator over the components (distinct shapelet bases) of the MultiShapeletBasis.
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Iterator
end() const
Public Types
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typedef MultiShapeletBasisComponent
Component
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typedef ComponentVector::const_iterator
Iterator
Public Functions
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MultiShapeletBasis(int size) Construct a MultiShapeletBasis with the given number of elements (i.e. free amplitudes).
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int
getSize() const Return the number of elements (i.e. free amplitudes) in the MultiShapeletBasis.
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int
getComponentCount() const Return the number of components (distinct shapelet bases) in the MultiShapeletBasis.
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void
addComponent(double radius, int order, ndarray::Array<double const, 2, 2> const &matrix) Add a new component (shapelet basis) to the MultiShapeletBasis.
Should usually only be called by MultiShapeletBasis::addComponent.
Note that matrix elements follow the amplitude convention defined by
ShapeletFunction; values are proportional to flux, not surface brightness.- Parameters
[in] radius: Radius of the shapelet expansion defined by this component.[in] order: Order of the shapelet expansion.[in] matrix: Matrix whose elements [i,j] map MultiShapeletBasis elements j to shapelet terms i; must have dimensions [computeSize(order), basis.getSize()], where “basis” is the MultiShapeletBasis this component is attached to. Will be deep-copied by the constructor.
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void
scale(double factor) Multiply the radius of all basis elements by the given factor.
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void
normalize() Rescale all matrices so each element has unit flux.
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void
merge(MultiShapeletBasis const &other) Combine the given basis with this (in place), by appending its elements.
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MultiShapeletFunction
makeFunction(afw::geom::ellipses::Ellipse const &ellipse, ndarray::Array<double const, 1, 1> const &coefficients) const Create a MultiShapeletFunction from the basis.
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[in] ellipse: Shapelet basis ellipse that will define the MultiShapeletFunction (will be scaled by the radius of each component).[in] coefficients: Coefficients of the basis elements.
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Iterator
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class
MultiShapeletBasisComponent - #include <MultiShapeletBasis.h>
Simple struct that represents one shapelet expansion in a MultiShapeletBasis.
A MultiShapeletBasis is formed by the linear combination of several shapelet bases with different radii and common ellipticity; this represents a single shapelet basis within the MultiShapeletBasis.
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This really ought to be an inner class, and should generally be referred to via the MultiShapeletBasis::Component typedef, but Swig doesn’t handle inner classes.
Public Functions
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MultiShapeletBasisComponent(double radius, int order, ndarray::Array<double const, 2, 2> const &matrix) Main constructor for MultiShapeletBasisComponent.
Should usually only be called by MultiShapeletBasis::addComponent.
Note that matrix elements follow the amplitude convention defined by
ShapeletFunction; values are proportional to flux, not surface brightness.- Parameters
[in] radius: Radius of the shapelet expansion defined by this component.[in] order: Order of the shapelet expansion.[in] matrix: Matrix whose elements [i,j] map MultiShapeletBasis elements j to shapelet terms i; must have dimensions [computeSize(order), basis.getSize()], where “basis” is the MultiShapeletBasis this component is attached to. Will be deep-copied by the constructor.
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double
getRadius() const Return the radius of this shapelet expansion.
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int
getOrder() const Order of this shapelet expansion.
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ndarray::Array<double const, 2, 2>
getMatrix() const Matrix whose elements [i,j] map MultiShapeletBasis elements j to shapelet terms i.
Friends
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friend
lsst::shapelet::MultiShapeletBasis
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class