FunctionLibrary.cc

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// -*- lsst-c++ -*-

#include <memory>

#include "lsst/afw/math/FunctionLibrary.h"
#include "lsst/afw/table/io/OutputArchive.h"
#include "lsst/afw/table/io/InputArchive.h"
#include "lsst/afw/table/io/CatalogVector.h"
#include "lsst/afw/table/aggregates.h"

namespace lsst {
namespace afw {
namespace math {

namespace {

// Singleton persistence schema for 2-d Gaussians
struct GaussianFunction2PersistenceHelper {
    table::Schema schema;
    table::Key<double> sigma1;
    table::Key<double> sigma2;
    table::Key<double> angle;

    static GaussianFunction2PersistenceHelper const& get() {
        static GaussianFunction2PersistenceHelper instance;
        return instance;
    }

    // No copying
    GaussianFunction2PersistenceHelper(const GaussianFunction2PersistenceHelper&) = delete;
    GaussianFunction2PersistenceHelper& operator=(const GaussianFunction2PersistenceHelper&) = delete;

    // No moving
    GaussianFunction2PersistenceHelper(GaussianFunction2PersistenceHelper&&) = delete;
    GaussianFunction2PersistenceHelper& operator=(GaussianFunction2PersistenceHelper&&) = delete;

private:
    GaussianFunction2PersistenceHelper()
            : schema(),
              sigma1(schema.addField<double>("sigma1", "sigma along axis 1")),
              sigma2(schema.addField<double>("sigma2", "sigma along axis 2")),
              angle(schema.addField<double>("angle", "angle of axis 1 in rad (along x=0, y=pi/2)")) {}
};

// Singleton persistence schema for 2-d circular DoubleGaussians
struct DoubleGaussianFunction2PersistenceHelper {
    table::Schema schema;
    table::Key<double> sigma1;
    table::Key<double> sigma2;
    table::Key<double> ampl2;

    static DoubleGaussianFunction2PersistenceHelper const& get() {
        static DoubleGaussianFunction2PersistenceHelper instance;
        return instance;
    }

    // No copying
    DoubleGaussianFunction2PersistenceHelper(const DoubleGaussianFunction2PersistenceHelper&) = delete;
    DoubleGaussianFunction2PersistenceHelper& operator=(const DoubleGaussianFunction2PersistenceHelper&) =
            delete;

    // No moving
    DoubleGaussianFunction2PersistenceHelper(DoubleGaussianFunction2PersistenceHelper&&) = delete;
    DoubleGaussianFunction2PersistenceHelper& operator=(DoubleGaussianFunction2PersistenceHelper&&) = delete;

private:
    DoubleGaussianFunction2PersistenceHelper()
            : schema(),
              sigma1(schema.addField<double>("sigma1", "sigma of first Gaussian")),
              sigma2(schema.addField<double>("sigma2", "sigma of second Gaussian")),
              ampl2(schema.addField<double>("ampl2", "peak of second Gaussian relative to peak of first")) {}
};

// Persistence schema for 2-d polynomials; not a singleton because it depends on the order.
struct PolynomialFunction2PersistenceHelper {
    table::Schema schema;
    table::Key<table::Array<double> > coefficients;

    explicit PolynomialFunction2PersistenceHelper(int nCoefficients)
            : schema(),
              coefficients(schema.addField<table::Array<double> >(
                      "coefficients",
                      "polynomial coefficients, ordered (x,y) [0,0; 1,0; 0,1; 2,0; 1,1; 0,2; ...]",
                      nCoefficients)) {}

    explicit PolynomialFunction2PersistenceHelper(table::Schema const& schema_)
            : schema(schema_), coefficients(schema["coefficients"]) {}
};

// Persistance schema for 2-d Chebyshevs; not a singleton because it depends on the order.
struct Chebyshev1Function2PersistenceHelper : public PolynomialFunction2PersistenceHelper {
    table::PointKey<double> min;
    table::PointKey<double> max;

    explicit Chebyshev1Function2PersistenceHelper(int nCoefficients)
            : PolynomialFunction2PersistenceHelper(nCoefficients),
              min(table::PointKey<double>::addFields(schema, "min", "minimum point for function's bbox",
                                                     "pixel")),
              max(table::PointKey<double>::addFields(schema, "max", "maximum point for function's bbox",
                                                     "pixel")) {}

    explicit Chebyshev1Function2PersistenceHelper(table::Schema const& schema_)
            : PolynomialFunction2PersistenceHelper(schema_), min(schema["min"]), max(schema["max"]) {}
};

template <typename ReturnT>
class GaussianFunction2Factory : public table::io::PersistableFactory {
public:
    std::shared_ptr<table::io::Persistable> read(InputArchive const& archive,
                                                 CatalogVector const& catalogs) const override {
        LSST_ARCHIVE_ASSERT(catalogs.size() == 1u);
        LSST_ARCHIVE_ASSERT(catalogs.front().size() == 1u);
        GaussianFunction2PersistenceHelper const& keys = GaussianFunction2PersistenceHelper::get();
        LSST_ARCHIVE_ASSERT(catalogs.front().getSchema().contains(keys.schema));
        table::BaseRecord const& record = catalogs.front().front();
        return std::make_shared<GaussianFunction2<ReturnT> >(record.get(keys.sigma1), record.get(keys.sigma2),
                                                             record.get(keys.angle));
    }

    GaussianFunction2Factory(std::string const& name) : table::io::PersistableFactory(name) {}
};

template <typename ReturnT>
class DoubleGaussianFunction2Factory : public table::io::PersistableFactory {
public:
    std::shared_ptr<table::io::Persistable> read(InputArchive const& archive,
                                                 CatalogVector const& catalogs) const override {
        LSST_ARCHIVE_ASSERT(catalogs.size() == 1u);
        LSST_ARCHIVE_ASSERT(catalogs.front().size() == 1u);
        DoubleGaussianFunction2PersistenceHelper const& keys =
                DoubleGaussianFunction2PersistenceHelper::get();
        LSST_ARCHIVE_ASSERT(catalogs.front().getSchema().contains(keys.schema));
        table::BaseRecord const& record = catalogs.front().front();
        return std::make_shared<DoubleGaussianFunction2<ReturnT> >(
                record.get(keys.sigma1), record.get(keys.sigma2), record.get(keys.ampl2));
    }

    DoubleGaussianFunction2Factory(std::string const& name) : table::io::PersistableFactory(name) {}
};

template <typename ReturnT>
class PolynomialFunction2Factory : public table::io::PersistableFactory {
public:
    std::shared_ptr<table::io::Persistable> read(InputArchive const& archive,
                                                 CatalogVector const& catalogs) const override {
        LSST_ARCHIVE_ASSERT(catalogs.size() == 1u);
        LSST_ARCHIVE_ASSERT(catalogs.front().size() == 1u);
        PolynomialFunction2PersistenceHelper const keys(catalogs.front().getSchema());
        return std::make_shared<PolynomialFunction2<ReturnT> >(
                keys.coefficients.extractVector(catalogs.front().front()));
    }

    PolynomialFunction2Factory(std::string const& name) : table::io::PersistableFactory(name) {}
};

template <typename ReturnT>
class Chebyshev1Function2Factory : public table::io::PersistableFactory {
public:
    std::shared_ptr<table::io::Persistable> read(InputArchive const& archive,
                                                 CatalogVector const& catalogs) const override {
        LSST_ARCHIVE_ASSERT(catalogs.size() == 1u);
        LSST_ARCHIVE_ASSERT(catalogs.front().size() == 1u);
        Chebyshev1Function2PersistenceHelper keys(catalogs.front().getSchema());
        table::BaseRecord const& record = catalogs.front().front();
        lsst::geom::Box2D bbox(record.get(keys.min), record.get(keys.max));
        return std::make_shared<Chebyshev1Function2<ReturnT> >(keys.coefficients.extractVector(record), bbox);
    }

    Chebyshev1Function2Factory(std::string const& name) : table::io::PersistableFactory(name) {}
};

GaussianFunction2Factory<float> registrationGaussian2F("GaussianFunction2F");
GaussianFunction2Factory<double> registrationGaussian2D("GaussianFunction2D");

DoubleGaussianFunction2Factory<float> registrationDoubleGaussian2F("DoubleGaussianFunction2F");
DoubleGaussianFunction2Factory<double> registrationDoubleGaussian2D("DoubleGaussianFunction2D");

PolynomialFunction2Factory<float> registrationPoly2F("PolynomialFunction2F");
PolynomialFunction2Factory<double> registrationPoly2D("PolynomialFunction2D");

Chebyshev1Function2Factory<float> registrationCheb2F("Chebyshev1Function2F");
Chebyshev1Function2Factory<double> registrationCheb2D("Chebyshev1Function2D");

template <typename T>
struct Suffix;
template <>
struct Suffix<float> {
    static std::string get() { return "F"; }
};
template <>
struct Suffix<double> {
    static std::string get() { return "D"; }
};

}  // namespace

template <typename ReturnT>
std::string GaussianFunction2<ReturnT>::getPersistenceName() const {
    return "GaussianFunction2" + Suffix<ReturnT>::get();
}

template <typename ReturnT>
std::string DoubleGaussianFunction2<ReturnT>::getPersistenceName() const {
    return "DoubleGaussianFunction2" + Suffix<ReturnT>::get();
}

template <typename ReturnT>
std::string PolynomialFunction2<ReturnT>::getPersistenceName() const {
    return "PolynomialFunction2" + Suffix<ReturnT>::get();
}

template <typename ReturnT>
std::string Chebyshev1Function2<ReturnT>::getPersistenceName() const {
    return "Chebyshev1Function2" + Suffix<ReturnT>::get();
}

template <typename ReturnT>
void GaussianFunction2<ReturnT>::write(table::io::OutputArchiveHandle& handle) const {
    GaussianFunction2PersistenceHelper const& keys = GaussianFunction2PersistenceHelper::get();
    table::BaseCatalog catalog = handle.makeCatalog(keys.schema);
    std::shared_ptr<table::BaseRecord> record = catalog.addNew();
    record->set(keys.sigma1, this->getParameters()[0]);
    record->set(keys.sigma2, this->getParameters()[1]);
    record->set(keys.angle, this->getParameters()[2]);
    handle.saveCatalog(catalog);
}

template <typename ReturnT>
void DoubleGaussianFunction2<ReturnT>::write(table::io::OutputArchiveHandle& handle) const {
    DoubleGaussianFunction2PersistenceHelper const& keys = DoubleGaussianFunction2PersistenceHelper::get();
    table::BaseCatalog catalog = handle.makeCatalog(keys.schema);
    std::shared_ptr<table::BaseRecord> record = catalog.addNew();
    record->set(keys.sigma1, this->getParameters()[0]);
    record->set(keys.sigma2, this->getParameters()[1]);
    record->set(keys.ampl2, this->getParameters()[2]);
    handle.saveCatalog(catalog);
}

template <typename ReturnT>
void PolynomialFunction2<ReturnT>::write(table::io::OutputArchiveHandle& handle) const {
    PolynomialFunction2PersistenceHelper const keys(this->getNParameters());
    table::BaseCatalog catalog = handle.makeCatalog(keys.schema);
    keys.coefficients.assignVector(*catalog.addNew(), this->getParameters());
    handle.saveCatalog(catalog);
}

template <typename ReturnT>
void Chebyshev1Function2<ReturnT>::write(table::io::OutputArchiveHandle& handle) const {
    Chebyshev1Function2PersistenceHelper const keys(this->getNParameters());
    table::BaseCatalog catalog = handle.makeCatalog(keys.schema);
    std::shared_ptr<table::BaseRecord> record = catalog.addNew();
    keys.coefficients.assignVector(*record, this->getParameters());
    lsst::geom::Box2D bbox = getXYRange();
    record->set(keys.min, bbox.getMin());
    record->set(keys.max, bbox.getMax());
    handle.saveCatalog(catalog);
}

// Explicit instantiation
#define INSTANTIATE(TYPE)                         \
    template class IntegerDeltaFunction1<TYPE>;   \
    template class IntegerDeltaFunction2<TYPE>;   \
    template class GaussianFunction1<TYPE>;       \
    template class GaussianFunction2<TYPE>;       \
    template class DoubleGaussianFunction2<TYPE>; \
    template class PolynomialFunction1<TYPE>;     \
    template class PolynomialFunction2<TYPE>;     \
    template class Chebyshev1Function1<TYPE>;     \
    template class Chebyshev1Function2<TYPE>;     \
    template class LanczosFunction1<TYPE>;        \
    template class LanczosFunction2<TYPE>;

INSTANTIATE(float);
INSTANTIATE(double);
}  // namespace math
}  // namespace afw
}  // namespace lsst