LSSTApplications  18.1.0
LSSTDataManagementBasePackage
ExposurePatch.h
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1 // -*- LSST-C++ -*-
2 
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24 
25 #if !defined(LSST_MEAS_ALGORITHMS_EXPOSURE_PATCH_H)
26 #define LSST_MEAS_ALGORITHMS_EXPOSURE_PATCH_H
27 
28 #include "lsst/base.h"
30 #include "lsst/geom/Point.h"
32 #include "lsst/afw/geom/SkyWcs.h"
33 
34 namespace lsst {
35 namespace meas {
36 namespace algorithms {
37 
41 template <typename ExposureT>
43 public:
44  typedef unsigned char FlagT;
45  typedef PTR(ExposurePatch) Ptr;
47 
49  ExposurePatch(CONST_PTR(ExposureT) exp,
51  geom::Point2D const& center
52  )
53  : _exp(exp), _foot(foot), _center(center), _fromStandard(), _toStandard() {}
54  ExposurePatch(CONST_PTR(ExposureT) exp,
55  afw::detection::Footprint const& standardFoot,
56  geom::Point2D const& standardCenter,
57  afw::geom::SkyWcs const& standardWcs
58  )
59  : _exp(exp) {
60  afw::geom::SkyWcs const& expWcs = *exp->getWcs();
61  auto const sky = standardWcs.pixelToSky(standardCenter);
62  const_cast<CONST_PTR(afw::detection::Footprint)&>(_foot) =
63  standardFoot.transform(standardWcs, expWcs, exp->getBBox());
64  const_cast<geom::Point2D&>(_center) = expWcs.skyToPixel(sky);
65  const_cast<geom::AffineTransform&>(_fromStandard) =
66  standardWcs.linearizePixelToSky(sky) * expWcs.linearizeSkyToPixel(sky);
67  const_cast<geom::AffineTransform&>(_toStandard) =
68  expWcs.linearizePixelToSky(sky) * standardWcs.linearizeSkyToPixel(sky);
69  }
70 
72  CONST_PTR(ExposureT) const getExposure() const { return _exp; }
73  CONST_PTR(afw::detection::Footprint) const getFootprint() const { return _foot; }
74  geom::Point2D const& getCenter() const { return _center; }
75  geom::AffineTransform const& fromStandard() const { return _fromStandard; }
76  geom::AffineTransform const& toStandard() const { return _toStandard; }
77 
79  void setCenter(geom::Point2D const& center) { _center = center; }
80 
81 private:
82  CONST_PTR(ExposureT) const _exp;
84  geom::Point2D _center;
85  geom::AffineTransform const _fromStandard;
86  geom::AffineTransform const _toStandard;
87 };
88 
90 template <typename ExposureT>
92 makeExposurePatch(CONST_PTR(ExposureT) exp, CONST_PTR(afw::detection::Footprint) foot,
93  geom::Point2D const& center) {
94  return std::make_shared<ExposurePatch<ExposureT> >(exp, foot, center);
95 }
96 template <typename ExposureT>
98 makeExposurePatch(CONST_PTR(ExposureT) exp, afw::detection::Footprint const& standardFoot,
99  geom::Point2D const& standardCenter, afw::geom::SkyWcs const& standardWcs) {
100  return std::make_shared<ExposurePatch<ExposureT> >(exp, standardFoot, standardCenter, standardWcs);
101 }
102 
103 } // namespace algorithms
104 } // namespace meas
105 } // namespace lsst
106 
107 #endif
geom::AffineTransform const & fromStandard() const
Definition: ExposurePatch.h:75
A 2-dimensional celestial WCS that transform pixels to ICRS RA/Dec, using the LSST standard for pixel...
Definition: SkyWcs.h:117
Basic LSST definitions.
ExposurePatch(boost::shared_ptr< ExposureT const > exp, boost::shared_ptr< afw::detection::Footprint const > foot, geom::Point2D const &center)
Constructor.
Definition: ExposurePatch.h:49
#define PTR(...)
Definition: base.h:41
lsst::geom::Point2D skyToPixel(lsst::geom::SpherePoint const &sky) const
Compute pixel position(s) from sky position(s)
Definition: SkyWcs.h:349
An affine coordinate transformation consisting of a linear transformation and an offset.
A convenience container for the exposure, peak and footprint that will be measured.
Definition: ExposurePatch.h:42
lsst::geom::SpherePoint pixelToSky(lsst::geom::Point2D const &pixel) const
Compute sky position(s) from pixel position(s)
Definition: SkyWcs.h:334
unsigned char FlagT
Type for flags.
Definition: ExposurePatch.h:44
#define CONST_PTR(...)
A shared pointer to a const object.
Definition: base.h:47
ExposurePatch(boost::shared_ptr< ExposureT const > exp, afw::detection::Footprint const &standardFoot, geom::Point2D const &standardCenter, afw::geom::SkyWcs const &standardWcs)
Definition: ExposurePatch.h:54
boost::shared_ptr< ExposurePatch const > ConstPtr
Definition: ExposurePatch.h:46
Point< double, 2 > Point2D
Definition: Point.h:324
std::shared_ptr< Footprint > transform(std::shared_ptr< geom::SkyWcs > source, std::shared_ptr< geom::SkyWcs > target, lsst::geom::Box2I const &region, bool doClip=true) const
Transform the footprint from one WCS to another.
Definition: Footprint.cc:84
geom::AffineTransform const & toStandard() const
Definition: ExposurePatch.h:76
A base class for image defects.
boost::shared_ptr< ExposurePatch > Ptr
Definition: ExposurePatch.h:45
lsst::geom::AffineTransform linearizePixelToSky(lsst::geom::SpherePoint const &coord, lsst::geom::AngleUnit const &skyUnit) const
Return the local linear approximation to pixelToSky at a point given in sky coordinates.
Definition: SkyWcs.cc:259
geom::Point2D const & getCenter() const
Definition: ExposurePatch.h:74
Class to describe the properties of a detected object from an image.
Definition: Footprint.h:62
lsst::afw::detection::Footprint Footprint
Definition: Source.h:61
boost::shared_ptr< ExposurePatch< ExposureT > > makeExposurePatch(boost::shared_ptr< ExposureT const > exp, boost::shared_ptr< afw::detection::Footprint const > foot, geom::Point2D const &center)
Factory function for ExposurePatch.
Definition: ExposurePatch.h:92
boost::shared_ptr< afw::detection::Footprint const > const getFootprint() const
Definition: ExposurePatch.h:73
lsst::geom::AffineTransform linearizeSkyToPixel(lsst::geom::SpherePoint const &coord, lsst::geom::AngleUnit const &skyUnit) const
Return the local linear approximation to skyToPixel at a point given in sky coordinates.
Definition: SkyWcs.cc:268
boost::shared_ptr< ExposureT const > const getExposure() const
Accessors.
Definition: ExposurePatch.h:72
void setCenter(geom::Point2D const &center)
Modifiers.
Definition: ExposurePatch.h:79