lsst.jointcal g99855d9996+e36f4299b4
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Polynomial transformation class. More...
#include <AstrometryTransform.h>
Polynomial transformation class.
Definition at line 280 of file AstrometryTransform.h.
lsst::jointcal::AstrometryTransformPolynomial::AstrometryTransformPolynomial | ( | std::size_t | order = 1 | ) |
Default transform : identity for all orders (>=1 ).
Default transform : identity for all orders (>=1 )
order | The highest total power (x+y) of monomials of this polynomial. |
Definition at line 471 of file AstrometryTransform.cc.
lsst::jointcal::AstrometryTransformPolynomial::AstrometryTransformPolynomial | ( | const AstrometryTransform * | transform, |
const Frame & | frame, | ||
std::size_t | order, | ||
std::size_t | nPoint = 1000 ) |
Constructs a "polynomial image" from an existing transform, over a specified domain.
Definition at line 484 of file AstrometryTransform.cc.
lsst::jointcal::AstrometryTransformPolynomial::AstrometryTransformPolynomial | ( | const std::shared_ptr< afw::geom::TransformPoint2ToPoint2 > & | transform, |
jointcal::Frame const & | domain, | ||
std::size_t | order, | ||
std::size_t | nSteps = 50 ) |
Constructs a polynomial approximation to an afw::geom::TransformPoint2ToPoint2.
[in] | transform | The transform to be approximated. |
[in] | domain | The valid domain of the transform. |
[in] | order | The polynomial order to use when approximating. |
[in] | nSteps | The number of sample points per axis (nSteps^2 total points). |
Definition at line 506 of file AstrometryTransform.cc.
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inlineinherited |
Definition at line 94 of file AstrometryTransform.h.
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overridevirtual |
Implements lsst::jointcal::AstrometryTransform.
Definition at line 573 of file AstrometryTransform.cc.
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virtual |
Implements lsst::jointcal::AstrometryTransform.
Transform a bounding box, taking either the inscribed or circumscribed box.
[in] | inputframe | The frame to be transformed. |
[in] | inscribed | Return the inscribed (true) or circumscribed (false) box. |
Definition at line 89 of file AstrometryTransform.cc.
All these apply(..) shadow the virtual one in derived classes, unless one writes "using AstrometryTransform::apply".
Definition at line 75 of file AstrometryTransform.h.
applies the tranfo to in and writes into out. Is indeed virtual.
Definition at line 71 of file AstrometryTransform.h.
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inlineoverridevirtual |
returns a copy (allocated by new) of the transformation.
Implements lsst::jointcal::AstrometryTransform.
Definition at line 344 of file AstrometryTransform.h.
double lsst::jointcal::AstrometryTransformPolynomial::coeffOrZero | ( | std::size_t | powX, |
std::size_t | powY, | ||
std::size_t | whichCoord ) const |
read access, zero if beyond order
Definition at line 756 of file AstrometryTransform.cc.
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virtual |
Return a reduced composition of newTransform = this(right()), or nullptr if it cannot be reduced.
"Reduced" in this context means that they are capable of being merged into a single transform, for example, for two polynomials:
\[ f(x) = 1 + x^2, g(x) = -1 + 3x \]
we would have h = f.composeAndReduce(g) == 2 - 6x + 9x^2
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To be overloaded by derived classes if they can properly reduce the composition.
right | The transform to apply first. |
Reimplemented from lsst::jointcal::AstrometryTransform.
Definition at line 131 of file AstrometryTransform.cc.
std::unique_ptr< AstrometryTransform > lsst::jointcal::AstrometryTransformPolynomial::composeAndReduce | ( | AstrometryTransformPolynomial const & | right | ) | const |
Return a reduced composition of newTransform = this(right()), or nullptr if it cannot be reduced.
"Reduced" in this context means that they are capable of being merged into a single transform, for example, for two polynomials:
\[ f(x) = 1 + x^2, g(x) = -1 + 3x \]
we would have h = f.composeAndReduce(g) == 2 - 6x + 9x^2
.
To be overloaded by derived classes if they can properly reduce the composition.
right | The transform to apply first. |
Definition at line 944 of file AstrometryTransform.cc.
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overridevirtual |
specialised analytic routine
Reimplemented from lsst::jointcal::AstrometryTransform.
Definition at line 597 of file AstrometryTransform.cc.
double lsst::jointcal::AstrometryTransformPolynomial::determinant | ( | ) | const |
Definition at line 826 of file AstrometryTransform.cc.
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overridevirtual |
guess what
Implements lsst::jointcal::AstrometryTransform.
Definition at line 926 of file AstrometryTransform.cc.
double & lsst::jointcal::AstrometryTransformPolynomial::getCoefficient | ( | std::size_t | powX, |
std::size_t | powY, | ||
std::size_t | whichCoord ) |
Get the coefficient of a given power in x and y, for either the x or y coordinate.
Definition at line 750 of file AstrometryTransform.cc.
double lsst::jointcal::AstrometryTransformPolynomial::getCoefficient | ( | std::size_t | powX, |
std::size_t | powY, | ||
std::size_t | whichCoord ) const |
Get the coefficient of a given power in x and y, for either the x or y coordinate.
Definition at line 741 of file AstrometryTransform.cc.
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virtualinherited |
returns the local jacobian.
Definition at line 100 of file AstrometryTransform.cc.
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inlinevirtualinherited |
returns the local jacobian.
Definition at line 110 of file AstrometryTransform.h.
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inlineoverridevirtual |
total number of parameters
Reimplemented from lsst::jointcal::AstrometryTransform.
Definition at line 321 of file AstrometryTransform.h.
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inline |
Returns the polynomial order.
Definition at line 307 of file AstrometryTransform.h.
params should be at least Npar() long
Definition at line 217 of file AstrometryTransform.cc.
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virtualinherited |
returns an inverse transform. Numerical if not overloaded.
precision and region refer to the "input" side of this, and hence to the output side of the returned AstrometryTransform.
Reimplemented in lsst::jointcal::TanPixelToRaDec, lsst::jointcal::TanSipPixelToRaDec, lsst::jointcal::TanRaDecToPixel, lsst::jointcal::AstrometryTransformLinear, and lsst::jointcal::AstrometryTransformInverse.
Definition at line 304 of file AstrometryTransform.cc.
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virtualinherited |
linear (local) approximation.
Reimplemented in lsst::jointcal::AstrometryTransformIdentity, and lsst::jointcal::AstrometryTransformLinear.
Definition at line 137 of file AstrometryTransform.cc.
Definition at line 222 of file AstrometryTransform.cc.
AstrometryTransformPolynomial lsst::jointcal::AstrometryTransformPolynomial::operator* | ( | AstrometryTransformPolynomial const & | right | ) | const |
Composition (internal stuff in quadruple precision)
Definition at line 1052 of file AstrometryTransform.cc.
AstrometryTransformPolynomial lsst::jointcal::AstrometryTransformPolynomial::operator+ | ( | AstrometryTransformPolynomial const & | right | ) | const |
Addition.
Definition at line 1074 of file AstrometryTransform.cc.
AstrometryTransformPolynomial lsst::jointcal::AstrometryTransformPolynomial::operator- | ( | AstrometryTransformPolynomial const & | right | ) | const |
Subtraction.
Definition at line 1088 of file AstrometryTransform.cc.
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overridevirtual |
Derivative w.r.t parameters.
Derivatives should be al least 2*NPar long. first Npar, for x, last Npar for y.
Reimplemented from lsst::jointcal::AstrometryTransform.
Definition at line 776 of file AstrometryTransform.cc.
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overridevirtual |
Reimplemented from lsst::jointcal::AstrometryTransform.
Definition at line 766 of file AstrometryTransform.cc.
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overridevirtual |
Reimplemented from lsst::jointcal::AstrometryTransform.
Definition at line 771 of file AstrometryTransform.cc.
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overridevirtual |
print out of coefficients in a readable form.
Implements lsst::jointcal::AstrometryTransform.
Definition at line 796 of file AstrometryTransform.cc.
void lsst::jointcal::AstrometryTransformPolynomial::read | ( | std::istream & | s | ) |
Definition at line 1114 of file AstrometryTransform.cc.
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virtualinherited |
Rough inverse.
Stored by the numerical inverter to guess starting point for the trials. Just here to enable overloading.
Reimplemented in lsst::jointcal::AstrometryTransformInverse, lsst::jointcal::TanPixelToRaDec, and lsst::jointcal::TanRaDecToPixel.
Definition at line 196 of file AstrometryTransform.cc.
void lsst::jointcal::AstrometryTransformPolynomial::setOrder | ( | std::size_t | order | ) |
Sets the polynomial order (the highest sum of exponents of the largest monomial).
Definition at line 552 of file AstrometryTransform.cc.
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overridevirtual |
Create an equivalent AST mapping for this transformation, including an analytic inverse if possible.
domain | The domain of the transform, to help find an inverse. |
Reimplemented from lsst::jointcal::AstrometryTransform.
Definition at line 1099 of file AstrometryTransform.cc.
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virtualinherited |
transform errors (represented as double[3] in order V(xx),V(yy),Cov(xy))
Definition at line 163 of file AstrometryTransform.cc.
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overridevirtual |
a mix of apply and Derivative
Reimplemented from lsst::jointcal::AstrometryTransform.
Definition at line 657 of file AstrometryTransform.cc.
Definition at line 107 of file AstrometryTransform.h.
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inherited |
Definition at line 247 of file AstrometryTransform.cc.
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overridevirtual |
Reimplemented from lsst::jointcal::AstrometryTransform.
Definition at line 1104 of file AstrometryTransform.cc.