LSST Applications 27.0.0,g0265f82a02+469cd937ee,g02d81e74bb+21ad69e7e1,g1470d8bcf6+cbe83ee85a,g2079a07aa2+e67c6346a6,g212a7c68fe+04a9158687,g2305ad1205+94392ce272,g295015adf3+81dd352a9d,g2bbee38e9b+469cd937ee,g337abbeb29+469cd937ee,g3939d97d7f+72a9f7b576,g487adcacf7+71499e7cba,g50ff169b8f+5929b3527e,g52b1c1532d+a6fc98d2e7,g591dd9f2cf+df404f777f,g5a732f18d5+be83d3ecdb,g64a986408d+21ad69e7e1,g858d7b2824+21ad69e7e1,g8a8a8dda67+a6fc98d2e7,g99cad8db69+f62e5b0af5,g9ddcbc5298+d4bad12328,ga1e77700b3+9c366c4306,ga8c6da7877+71e4819109,gb0e22166c9+25ba2f69a1,gb6a65358fc+469cd937ee,gbb8dafda3b+69d3c0e320,gc07e1c2157+a98bf949bb,gc120e1dc64+615ec43309,gc28159a63d+469cd937ee,gcf0d15dbbd+72a9f7b576,gdaeeff99f8+a38ce5ea23,ge6526c86ff+3a7c1ac5f1,ge79ae78c31+469cd937ee,gee10cc3b42+a6fc98d2e7,gf1cff7945b+21ad69e7e1,gfbcc870c63+9a11dc8c8f
LSST Data Management Base Package
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A basis formed from a linear combination of shapelet bases that differ only in radius. More...
#include <MultiShapeletBasis.h>
Public Types | |
typedef MultiShapeletBasisComponent | Component |
typedef std::vector< Component > | ComponentVector |
typedef ComponentVector::const_iterator | Iterator |
Public Member Functions | |
MultiShapeletBasis (int size) | |
Construct a MultiShapeletBasis with the given number of elements (i.e. free amplitudes). | |
int | getSize () const |
Return the number of elements (i.e. free amplitudes) in the MultiShapeletBasis. | |
int | getComponentCount () const |
Return the number of components (distinct shapelet bases) in the MultiShapeletBasis. | |
Iterator | begin () const |
Iterator over the components (distinct shapelet bases) of the MultiShapeletBasis. | |
Iterator | end () const |
void | addComponent (double radius, int order, ndarray::Array< double const, 2, 2 > const &matrix) |
Add a new component (shapelet basis) to the MultiShapeletBasis. | |
void | scale (double factor) |
Multiply the radius of all basis elements by the given factor. | |
void | normalize () |
Rescale all matrices so each element has unit flux. | |
void | merge (MultiShapeletBasis const &other) |
Combine the given basis with this (in place), by appending its elements. | |
MultiShapeletFunction | makeFunction (afw::geom::ellipses::Ellipse const &ellipse, ndarray::Array< double const, 1, 1 > const &coefficients) const |
Create a MultiShapeletFunction from the basis. | |
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.
Definition at line 93 of file MultiShapeletBasis.h.
Definition at line 95 of file MultiShapeletBasis.h.
Definition at line 96 of file MultiShapeletBasis.h.
typedef ComponentVector::const_iterator lsst::shapelet::MultiShapeletBasis::Iterator |
Definition at line 97 of file MultiShapeletBasis.h.
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Construct a MultiShapeletBasis with the given number of elements (i.e. free amplitudes).
void lsst::shapelet::MultiShapeletBasis::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.
[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. |
Note that matrix elements follow the amplitude convention defined by ShapeletFunction; values are proportional to flux, not surface brightness.
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Iterator over the components (distinct shapelet bases) of the MultiShapeletBasis.
Definition at line 110 of file MultiShapeletBasis.h.
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inline |
Definition at line 111 of file MultiShapeletBasis.h.
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inline |
Return the number of components (distinct shapelet bases) in the MultiShapeletBasis.
Definition at line 106 of file MultiShapeletBasis.h.
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inline |
Return the number of elements (i.e. free amplitudes) in the MultiShapeletBasis.
Definition at line 103 of file MultiShapeletBasis.h.
MultiShapeletFunction lsst::shapelet::MultiShapeletBasis::makeFunction | ( | afw::geom::ellipses::Ellipse const & | ellipse, |
ndarray::Array< double const, 1, 1 > const & | coefficients ) const |
Create a MultiShapeletFunction from the basis.
[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. |
void lsst::shapelet::MultiShapeletBasis::merge | ( | MultiShapeletBasis const & | other | ) |
Combine the given basis with this (in place), by appending its elements.
void lsst::shapelet::MultiShapeletBasis::normalize | ( | ) |
Rescale all matrices so each element has unit flux.
void lsst::shapelet::MultiShapeletBasis::scale | ( | double | factor | ) |
Multiply the radius of all basis elements by the given factor.