File CentroidUtilities.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.
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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
meas -
namespace
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class
CentroidChecker Public Functions
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CentroidChecker(afw::table::Schema &schema, std::string const &name, bool inside = true, double maxDistFromPeak = -1.0) Check source record produced by a centroid algorithm called “name”.
If the centroid is accompanied by uncertainties (the xErr and yErr fields), these should not be NaN. If they are, the algorithmName + “_flag_badError” flag and the general failure flag for the algorithm are both set.
If the centroid set by the algorithm lies outside the footprint attached to the record, or the centroid is more than “dist” pixels from the footprint peak:
(1) the general failure flag for the algorithm is set (2) algorithmName + “_flag_resetToPeak” flag is set (3) the position of the centroid is changed to that of the footprint Peak
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[inout] schema: Schema to which the flag_resetToPeak is to be added[in] name: The name of the algorithm we will be checking[in] doFootprintCheck: Check if centroid is within footprint[in] maxDistFromPeak: Check if centroid is more than dist from footprint peak
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bool
operator()(afw::table::SourceRecord &record) const Set the centroid to the first footprint if the centroid is either more than _dist pixels from the footprint center, or if it is outside the footprint. Set appropriate flags to indicate any changes to the centroid, and to indicate if uncertainties are set to invalid (“NaN”) values.
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struct
CentroidResult¶ - #include <CentroidUtilities.h>
A reusable struct for centroid measurements.
Subclassed by lsst::meas::base::SdssShapeResult
Public Functions
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CentroidResult()¶ Constructor; initializes everything to NaN.
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CentroidResult(CentroidElement x_, CentroidElement y_, CentroidCov const &matrix)¶ Constructor; initializes everything from values.
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CentroidResult(CentroidElement x_, CentroidElement y_, ErrElement xErr_, ErrElement yErr_)¶ Constructor; initializes everything from values.
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geom::Point<CentroidElement>
getPoint()¶ Return the 2D point type corresponding to this result.
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CentroidCov const
getCentroidErr() const¶ Return the 2x2 symmetric covariance matrix, with rows and columns ordered (x, y)
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void
setCentroidErr(CentroidCov const &matrix)¶ Set the struct uncertainty fields from the given matrix, with rows and columns ordered (x, y)
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void
setCentroidErr(ErrElement _xErr, ErrElement _yErr)¶ Set the struct uncertainty fields from the sigma values.
Public Members
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CentroidElement
x¶ x (column) coordinate of the measured position
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CentroidElement
y¶ y (row) coordinate of the measured position
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ErrElement
xErr¶ standard deviation of x
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ErrElement
yErr¶ standard deviation of y
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ErrElement
x_y_Cov¶ x,y term in the uncertainty convariance matrix
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class
CentroidResultKey: public lsst::afw::table::FunctorKey<CentroidResult> - #include <CentroidUtilities.h>
A FunctorKey for CentroidResult.
This class makes it easy to copy centroids and their uncertainties to and from records, and provides a method to add the appropriate fields to a Schema.
Unnamed Group
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bool
operator==(CentroidResultKey const &other) const Compare the FunctorKey for equality with another, using the underlying Keys.
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bool
operator!=(CentroidResultKey const &other) const
Public Functions
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CentroidResultKey() Default constructor; instance will not be usuable unless subsequently assigned to.
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CentroidResultKey(afw::table::PointKey<CentroidElement> const ¢roid, afw::table::CovarianceMatrixKey<ErrElement, 2> const ¢roidErr) Construct from a pair of Keys.
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CentroidResultKey(afw::table::SubSchema const &s) Construct from a subschema, assuming _x, _y, etc. subfields.
If a schema has “a_x”, “a_y”, etc. fields, this constructor allows you to construct a CentroidResultKey via:
CentroidResultKey k(schema["a"]);
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virtual CentroidResult
get(afw::table::BaseRecord const &record) const Get a CentroidResult from the given record.
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virtual void
set(afw::table::BaseRecord &record, CentroidResult const &value) const Set a CentroidResult in the given record.
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bool
isValid() const Return True if the centroid key is valid.
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afw::table::PointKey<CentroidElement>
getCentroid() const Return a FunctorKey to just the centroid value.
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afw::table::CovarianceMatrixKey<ErrElement, 2>
getCentroidErr() const Return a FunctorKey to just the uncertainty matrix.
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afw::table::Key<CentroidElement>
getX() const Return a Key for the x coordinate.
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afw::table::Key<CentroidElement>
getY() const Return a Key for the y coordinate.
Public Static Functions
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static CentroidResultKey
addFields(afw::table::Schema &schema, std::string const &name, std::string const &doc, UncertaintyEnum uncertainty) Add the appropriate fields to a Schema, and return a CentroidResultKey that manages them.
The unit for all fields will be pixels (pixels^2 for covariances).
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[inout] schema: Schema to add fields to.[in] name: Name prefix for all fields; “_x”, “_y”, etc. will be appended to this to form the full field names.[in] doc: String used as the documentation for the x and y fields.[in] uncertainty: Enum indicating which (if any) uncertainty values will be saved.
Private Members
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afw::table::PointKey<CentroidElement>
_centroid¶
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afw::table::CovarianceMatrixKey<ErrElement, 2>
_centroidErr¶
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bool
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class
CentroidTransform: public lsst::meas::base::BaseTransform - #include <CentroidUtilities.h>
Base for centroid measurement transformations.
Provides a basic transform from centroid plus associated uncertainty to celestial position with uncertainty. The basic “flag” attribute for the measurement algorithm is propagated to the output.
Subclasses should define a constructor which take a Control argument corresponding to the measurement algorithm being transformed and ensure that any other necessary flags are propagated.
Subclassed by lsst::meas::base::NaiveCentroidTransform, lsst::meas::base::SdssCentroidTransform
Public Functions
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CentroidTransform(std::string const &name, afw::table::SchemaMapper &mapper)
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virtual void
operator()(afw::table::SourceCatalog const &inputCatalog, afw::table::BaseCatalog &outputCatalog, afw::geom::SkyWcs const &wcs, afw::image::PhotoCalib const &photoCalib) const
Private Members
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afw::table::CovarianceMatrixKey<ErrElement, 2>
_coordErrKey¶
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