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LSST Data Management Base Package
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This one is the Tangent Plane (called gnomonic) projection (from celestial sphere to tangent plane) More...
#include <AstrometryTransform.h>
Public Member Functions | |
TanRaDecToPixel (AstrometryTransformLinear tan2Pix, Point const &tangentPoint) | |
assume degrees everywhere. | |
TanRaDecToPixel () | |
AstrometryTransformLinear | getLinPart () const |
The Linear part (corresponding to CD's and CRPIX's) | |
void | setTangentPoint (Point const &tangentPoint) |
Resets the projection (or tangent) point. | |
Point | getTangentPoint () const |
tangent point coordinates (degrees) | |
void | apply (double xIn, double yIn, double &xOut, double &yOut) const |
void | transformPosAndErrors (const FatPoint &in, FatPoint &out) const |
transform with analytical derivatives | |
TanPixelToRaDec | inverted () const |
exact typed inverse: | |
std::unique_ptr< AstrometryTransform > | roughInverse (const Frame ®ion) const |
Overload the "generic routine" (available for all AstrometryTransform types. | |
std::unique_ptr< AstrometryTransform > | inverseTransform (double precision, const Frame ®ion) const |
Inverse transform: returns a TanPixelToRaDec. | |
void | print (std::ostream &out) const |
prints the transform coefficients to stream. | |
std::unique_ptr< AstrometryTransform > | clone () const |
returns a copy (allocated by new) of the transformation. | |
double | fit (StarMatchList const &starMatchList) |
fits a transform to a std::list of Point pairs (p1,p2, the Point fields in StarMatch). | |
virtual void | apply (double xIn, double yIn, double &xOut, double &yOut) const=0 |
void | apply (Point const &in, Point &out) const |
applies the tranfo to in and writes into out. Is indeed virtual. | |
Point | apply (Point const &in) const |
All these apply(..) shadow the virtual one in derived classes, unless one writes "using
AstrometryTransform::apply". | |
Frame | apply (Frame const &inputframe, bool inscribed) const |
Transform a bounding box, taking either the inscribed or circumscribed box. | |
std::string | __str__ () const |
void | transformStar (FatPoint &in) const |
virtual double | getJacobian (Point const &point) const |
returns the local jacobian. | |
virtual double | getJacobian (double x, double y) const |
returns the local jacobian. | |
virtual std::unique_ptr< AstrometryTransform > | composeAndReduce (AstrometryTransform const &right) const |
Return a reduced composition of newTransform = this(right()), or nullptr if it cannot be reduced. | |
virtual void | computeDerivative (Point const &where, AstrometryTransformLinear &derivative, double step=0.01) const |
Computes the local Derivative of a transform, w.r.t. | |
virtual AstrometryTransformLinear | linearApproximation (Point const &where, double step=0.01) const |
linear (local) approximation. | |
virtual void | transformErrors (Point const &where, const double *vIn, double *vOut) const |
transform errors (represented as double[3] in order V(xx),V(yy),Cov(xy)) | |
void | getParams (double *params) const |
params should be at least Npar() long | |
void | offsetParams (Eigen::VectorXd const &delta) |
virtual double | paramRef (Eigen::Index i) const |
virtual double & | paramRef (Eigen::Index i) |
virtual void | paramDerivatives (Point const &where, double *dx, double *dy) const |
Derivative w.r.t parameters. | |
virtual std::size_t | getNpar () const |
returns the number of parameters (to compute chi2's) | |
virtual std::shared_ptr< ast::Mapping > | toAstMap (jointcal::Frame const &domain) const |
Create an equivalent AST mapping for this transformation, including an analytic inverse if possible. | |
void | write (const std::string &fileName) const |
virtual void | write (std::ostream &stream) const |
This one is the Tangent Plane (called gnomonic) projection (from celestial sphere to tangent plane)
this transform does not implement corrections, since they are defined the other way around (from pixels to sky), and not invertible analytically. The inversion of tangent point WCS (TanPixelToRaDec) is obtained via inverseTransform().
Definition at line 707 of file AstrometryTransform.h.
lsst::jointcal::TanRaDecToPixel::TanRaDecToPixel | ( | AstrometryTransformLinear | tan2Pix, |
Point const & | tangentPoint ) |
assume degrees everywhere.
Definition at line 1660 of file AstrometryTransform.cc.
lsst::jointcal::TanRaDecToPixel::TanRaDecToPixel | ( | ) |
Definition at line 1674 of file AstrometryTransform.cc.
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inlineinherited |
Definition at line 94 of file AstrometryTransform.h.
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virtual |
Implements lsst::jointcal::AstrometryTransform.
Definition at line 1737 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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virtual |
returns a copy (allocated by new) of the transformation.
Implements lsst::jointcal::AstrometryTransform.
Definition at line 1776 of file AstrometryTransform.cc.
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virtualinherited |
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 in lsst::jointcal::AstrometryTransformPolynomial, lsst::jointcal::TanPixelToRaDec, and lsst::jointcal::AstrometryTransformIdentity.
Definition at line 95 of file AstrometryTransform.cc.
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virtualinherited |
Computes the local Derivative of a transform, w.r.t.
the Derivative is represented by a AstrometryTransformLinear, in which (hopefully), the offset terms are zero.
position.
Step is used for numerical derivation.
Derivative should transform a vector of offsets into a vector of offsets.
Reimplemented in lsst::jointcal::AstrometryTransformIdentity, lsst::jointcal::AstrometryTransformPolynomial, and lsst::jointcal::AstrometryTransformLinear.
Definition at line 119 of file AstrometryTransform.cc.
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virtual |
fits a transform to a std::list of Point pairs (p1,p2, the Point fields in StarMatch).
After the fit this(p1) yields approximately p2. The returned value is the sum of squared residuals. If you want to fit a partial transform (e.g. such that this(T1(p1)) = T2(p2), use StarMatchList::applyTransform beforehand.
Implements lsst::jointcal::AstrometryTransform.
Definition at line 1780 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.
AstrometryTransformLinear lsst::jointcal::TanRaDecToPixel::getLinPart | ( | ) | const |
The Linear part (corresponding to CD's and CRPIX's)
Definition at line 1682 of file AstrometryTransform.cc.
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inlinevirtualinherited |
returns the number of parameters (to compute chi2's)
Reimplemented in lsst::jointcal::AstrometryTransformLinearShift, lsst::jointcal::AstrometryTransformLinearRot, lsst::jointcal::AstrometryTransformLinearScale, lsst::jointcal::AstrometryTransformIdentity, and lsst::jointcal::AstrometryTransformPolynomial.
Definition at line 180 of file AstrometryTransform.h.
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inherited |
params should be at least Npar() long
Definition at line 217 of file AstrometryTransform.cc.
Point lsst::jointcal::TanRaDecToPixel::getTangentPoint | ( | ) | const |
tangent point coordinates (degrees)
Definition at line 1680 of file AstrometryTransform.cc.
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virtual |
Inverse transform: returns a TanPixelToRaDec.
Reimplemented from lsst::jointcal::AstrometryTransform.
Definition at line 1771 of file AstrometryTransform.cc.
TanPixelToRaDec lsst::jointcal::TanRaDecToPixel::inverted | ( | ) | const |
exact typed inverse:
Definition at line 1756 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.
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inherited |
Definition at line 222 of file AstrometryTransform.cc.
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virtualinherited |
Derivative w.r.t parameters.
Derivatives should be al least 2*NPar long. first Npar, for x, last Npar for y.
Reimplemented in lsst::jointcal::AstrometryTransformPolynomial.
Definition at line 237 of file AstrometryTransform.cc.
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virtualinherited |
Reimplemented in lsst::jointcal::AstrometryTransformPolynomial.
Definition at line 232 of file AstrometryTransform.cc.
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virtualinherited |
Reimplemented in lsst::jointcal::AstrometryTransformPolynomial.
Definition at line 227 of file AstrometryTransform.cc.
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virtual |
prints the transform coefficients to stream.
Implements lsst::jointcal::AstrometryTransform.
Definition at line 1760 of file AstrometryTransform.cc.
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virtual |
Overload the "generic routine" (available for all AstrometryTransform types.
Reimplemented from lsst::jointcal::AstrometryTransform.
Definition at line 1766 of file AstrometryTransform.cc.
void lsst::jointcal::TanRaDecToPixel::setTangentPoint | ( | Point const & | tangentPoint | ) |
Resets the projection (or tangent) point.
Definition at line 1665 of file AstrometryTransform.cc.
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inlinevirtualinherited |
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 in lsst::jointcal::AstrometryTransformIdentity, and lsst::jointcal::AstrometryTransformPolynomial.
Definition at line 189 of file AstrometryTransform.h.
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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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virtual |
transform with analytical derivatives
Reimplemented from lsst::jointcal::AstrometryTransform.
Definition at line 1685 of file AstrometryTransform.cc.
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inlineinherited |
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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virtualinherited |
Reimplemented in lsst::jointcal::AstrometryTransformIdentity, and lsst::jointcal::AstrometryTransformPolynomial.
Definition at line 257 of file AstrometryTransform.cc.