lsst::gauss2d::fit::PsfModel Class Reference

A Gaussian mixture model of a point spread function. More...

#include <psfmodel.h>

Inheritance diagram for lsst::gauss2d::fit::PsfModel:

Public Member Functions
	PsfModel (Components &components)
	~PsfModel ()
void	add_extra_param_map (const Channel &channel, ExtraParamMap &map_extra, const GradParamMap &map_grad, ParameterMap &offsets) const override
	Add extra Parameter indices to a map.
void	add_extra_param_factors (const Channel &channel, ExtraParamFactors &factors) const override
	Add extra Parameter gradient factors to an existing vector.
void	add_grad_param_map (const Channel &channel, GradParamMap &map, ParameterMap &offsets) const override
	Add Parameter gradient indices to an existing map.
void	add_grad_param_factors (const Channel &channel, GradParamFactors &factor) const override
	Add Parameter gradient factors to an existing map.
Components	get_components () const override
std::unique_ptr< const lsst::gauss2d::Gaussians >	get_gaussians (const Channel &channel=Channel::NONE()) const override
	Return the vector of Gaussian sub-components controlled by this model.
size_t	get_n_gaussians (const Channel &channel=Channel::NONE()) const override
	Return the number of Gaussian sub-components controlled by this model.
ParamRefs &	get_parameters (ParamRefs &params, ParamFilter *filter=nullptr) const override
	Add Parameter refs matching the filter to a vector, in order.
ParamCRefs &	get_parameters_const (ParamCRefs &params, ParamFilter *filter=nullptr) const override
	Same as get_parameters(), but for const refs.
void	set_extra_param_factors (const Channel &channel, ExtraParamFactors &factors, size_t index) const override
	Set extra Parameter gradient factors in an existing map.
void	set_grad_param_factors (const Channel &channel, GradParamFactors &factor, size_t index) const override
	Set Parameter gradient factors in an existing map.
std::string	repr (bool name_keywords=false, std::string_view namespace_separator=Object::CC_NAMESPACE_SEPARATOR) const override
	Return a full, callable string representation of this.
std::string	str () const override
	Return a brief, human-readable string representation of this.
ParamRefs	get_parameters_new (ParamFilter *filter=nullptr) const
	Same as get_parameters(), but returning a new vector.
ParamCRefs	get_parameters_const_new (ParamFilter *filter=nullptr) const
	Same as get_parameters_const(), but returning a new vector.

Static Public Member Functions
static std::string_view	null_str (const std::string_view &namespace_separator)

Static Public Attributes
static constexpr std::string_view	CC_NAMESPACE_SEPARATOR = "::"
	The C++ namespace separator.
static constexpr std::string_view	NULL_STR_GENERAL = "None"
static constexpr std::string_view	PY_NAMESPACE_SEPARATOR = "."

Detailed Description

A Gaussian mixture model of a point spread function.

A PsfModel is, like a Source, a ComponentMixture. It represents the PSF, i.e. the smoothing kernel for a single Observation (whether from the optical system, environmental conditions, or any other source of blurring). As such, it should have an IntegralModel instance that sum to unity. This is most easily enforced with the use of FractionalIntegralModel.

PsfModels are also generally required to not have a specific Channel. Logically, it should have the same Channel as the Observation it applies to, but generally, it cannot be defined to apply to multiple Observations, so non-NONE Channels are disallowed to reflect this fact.

Definition at line 26 of file psfmodel.h.

Constructor & Destructor Documentation

PsfModel()

lsst::gauss2d::fit::PsfModel::PsfModel ( Components & components )

explicit

Definition at line 12 of file psfmodel.cc.

                                         {
    size_t i = 0;
    _components.reserve(components.size());
    for (auto& component : components) {
        if (component == nullptr)
            throw std::invalid_argument("PsfModel components[" + std::to_string(i) + "] can't be null");
        auto channels = component->get_integralmodel().get_channels();
        if ((channels.size() != 1) || ((*channels.begin()).get() != Channel::NONE())) {
            throw std::invalid_argument("PsfModel components[" + std::to_string(i)
                                        + "].get_integralmodel().get_channels()="
                                        + str_iter_ref<true>(channels) + " must only contain None");
        }
        _components.push_back(std::move(component));
        i++;
    }
}

~PsfModel()

lsst::gauss2d::fit::PsfModel::~PsfModel

(

)

Definition at line 29 of file psfmodel.cc.

{}

Member Function Documentation

add_extra_param_factors()

void lsst::gauss2d::fit::PsfModel::add_extra_param_factors ( const Channel & channel, ExtraParamFactors & factors ) const

overridevirtual

Add extra Parameter gradient factors to an existing vector.

Parameters

channel	The Channel to add factors for.
factors	The ExtraParamFactors to add to.

Implements lsst::gauss2d::fit::ParametricModel.

Definition at line 36 of file psfmodel.cc.

                                                                                               {
    for (auto& component : _components) component->add_extra_param_factors(channel, factors);
}

add_extra_param_map()

void lsst::gauss2d::fit::PsfModel::add_extra_param_map ( const Channel & channel, ExtraParamMap & map_extra, const GradParamMap & map_grad, ParameterMap & offsets ) const

overridevirtual

Add extra Parameter indices to a map.

Parameters

channel	The Channel to add indices for.
map_extra	The ExtraParamMap to add to.
map_grad	The completed GradParamMap.
offsets	A map of index offsets for Parameters that have already been added.

Implements lsst::gauss2d::fit::ParametricModel.

Definition at line 31 of file psfmodel.cc.

                                                                                              {
    for (auto& component : _components) component->add_extra_param_map(channel, map_extra, map_grad, offsets);
}

add_grad_param_factors()

void lsst::gauss2d::fit::PsfModel::add_grad_param_factors ( const Channel & channel, GradParamFactors & factors ) const

overridevirtual

Add Parameter gradient factors to an existing map.

Parameters

channel	The Channel to add factors for.
factors	The GradParamFactors to add to.

Implements lsst::gauss2d::fit::ParametricModel.

Definition at line 44 of file psfmodel.cc.

                                                                                             {
    for (auto& component : _components) component->add_grad_param_factors(channel, factors);
}

add_grad_param_map()

void lsst::gauss2d::fit::PsfModel::add_grad_param_map ( const Channel & channel, GradParamMap & map, ParameterMap & offsets ) const

overridevirtual

Add Parameter gradient indices to an existing map.

Parameters

channel	The Channel to add indices for.
map	The map to add to.
offsets	A map of index offsets for Parameters that have already been added.

Implements lsst::gauss2d::fit::ParametricModel.

Definition at line 40 of file psfmodel.cc.

                                                                                                        {
    for (auto& component : _components) component->add_grad_param_map(channel, map, offsets);
}

get_components()

Components lsst::gauss2d::fit::PsfModel::get_components ( ) const

overridevirtual

Implements lsst::gauss2d::fit::ComponentMixture.

Definition at line 48 of file psfmodel.cc.

{ return _components; }

get_gaussians()

std::unique_ptr< const lsst::gauss2d::Gaussians > lsst::gauss2d::fit::PsfModel::get_gaussians ( const Channel & channel = Channel::NONE() ) const

overridevirtual

Return the vector of Gaussian sub-components controlled by this model.

Parameters

channel

The Channel to return Gaussians for.

Returns

The Gaussians controlled by this model.

Implements lsst::gauss2d::fit::ParametricModel.

Definition at line 50 of file psfmodel.cc.

                                                                                              {
    std::vector<std::optional<const lsst::gauss2d::Gaussians::Data>> in;
    in.reserve(_components.size());
    for (auto& component : _components) {
        in.push_back(component->get_gaussians(channel)->get_data());
    }
    return std::make_unique<lsst::gauss2d::Gaussians>(in);
}

get_n_gaussians()

size_t lsst::gauss2d::fit::PsfModel::get_n_gaussians ( const Channel & channel = Channel::NONE() ) const

overridevirtual

Return the number of Gaussian sub-components controlled by this model.

Implements lsst::gauss2d::fit::ParametricModel.

Definition at line 59 of file psfmodel.cc.

                                                             {
    size_t n_g = 0;
    for (auto& component : _components) n_g += component->get_n_gaussians(channel);
    return n_g;
}

get_parameters()

ParamRefs & lsst::gauss2d::fit::PsfModel::get_parameters ( ParamRefs & params, ParamFilter * filter = nullptr ) const

overridevirtual

Add Parameter refs matching the filter to a vector, in order.

Parameters

params	The vector to add to.
filter	The filter to apply to this Object's parameters.

Returns

A ref to params (for method chaining)

Implements lsst::gauss2d::fit::Parametric.

Definition at line 65 of file psfmodel.cc.

                                                                                {
    for (auto& component : _components) component->get_parameters(params, filter);
    return params;
}

get_parameters_const()

ParamCRefs & lsst::gauss2d::fit::PsfModel::get_parameters_const ( ParamCRefs & params, ParamFilter * filter = nullptr ) const

overridevirtual

Same as get_parameters(), but for const refs.

Implements lsst::gauss2d::fit::Parametric.

Definition at line 69 of file psfmodel.cc.

                                                                                        {
    for (auto& component : _components) component->get_parameters_const(params, filter);
    return params;
}

get_parameters_const_new()

ParamCRefs lsst::gauss2d::fit::Parametric::get_parameters_const_new ( ParamFilter * filter = nullptr ) const

inlineinherited

Same as get_parameters_const(), but returning a new vector.

Definition at line 33 of file parametric.h.

                                                                             {
        ParamCRefs params{};
        get_parameters_const(params, filter);
        return params;
    }

get_parameters_new()

ParamRefs lsst::gauss2d::fit::Parametric::get_parameters_new ( ParamFilter * filter = nullptr ) const

inlineinherited

Same as get_parameters(), but returning a new vector.

Definition at line 27 of file parametric.h.

                                                                      {
        ParamRefs params{};
        get_parameters(params, filter);
        return params;
    }

null_str()

static std::string_view lsst::gauss2d::Object::null_str ( const std::string_view & namespace_separator )

inlinestaticinherited

Definition at line 49 of file object.h.

                                                                              {
        return namespace_separator == CC_NAMESPACE_SEPARATOR ? "nullptr" : NULL_STR_GENERAL;
    }

repr()

std::string lsst::gauss2d::fit::PsfModel::repr ( bool name_keywords = false, std::string_view namespace_separator = Object::CC_NAMESPACE_SEPARATOR ) const

overridevirtual

Return a full, callable string representation of this.

Parameters

name_keywords	Whether to prefix arguments with "{name}=", where name is the arg name in the header (as with keyword arguments in Python).
namespace_separator	The string to use to delimit namespaces, i.e. :: in C++ and . in Python.

Returns

A callable string representation of this, which should return an an identical object to this.

Note

The representation with name_keywords=false must be callable in C++. The representation with name_keywords=true should be callable in Python, if there are any bindings.

Implements lsst::gauss2d::Object.

Definition at line 83 of file psfmodel.cc.

                                                                                     {
    std::string str = type_name_str<PsfModel>(false, namespace_separator) + "("
                      + (name_keywords ? "components=[" : "[");
    for (const auto& s : _components) str += s->repr(name_keywords, namespace_separator) + ",";
    return str + "])";
}

set_extra_param_factors()

void lsst::gauss2d::fit::PsfModel::set_extra_param_factors ( const Channel & channel, ExtraParamFactors & factors, size_t index ) const

overridevirtual

Set extra Parameter gradient factors in an existing map.

Parameters

channel	The Channel to set factors for.
factors	The ExtraParamFactors to set factors for.
index	The index to begin setting factors at.

Implements lsst::gauss2d::fit::ParametricModel.

Definition at line 74 of file psfmodel.cc.

                                                           {
    for (auto& component : _components) component->set_extra_param_factors(channel, factors, index);
}

set_grad_param_factors()

void lsst::gauss2d::fit::PsfModel::set_grad_param_factors ( const Channel & channel, GradParamFactors & factors, size_t index ) const

overridevirtual

Set Parameter gradient factors in an existing map.

Parameters

channel	The Channel to set factors for.
factors	The GradParamFactors to set factors for.
index	The index to begin setting factors at.

Implements lsst::gauss2d::fit::ParametricModel.

Definition at line 79 of file psfmodel.cc.

                                                                                                           {
    for (auto& component : _components) component->set_grad_param_factors(channel, factors, index);
}

str()

std::string lsst::gauss2d::fit::PsfModel::str ( ) const

overridevirtual

Return a brief, human-readable string representation of this.

Implements lsst::gauss2d::Object.

Definition at line 90 of file psfmodel.cc.

                              {
    std::string str = type_name_str<PsfModel>(true) + "(components=[";
    for (const auto& s : _components) str += s->str() + ",";
    return str + "])";
}

Member Data Documentation

CC_NAMESPACE_SEPARATOR

constexpr std::string_view lsst::gauss2d::Object::CC_NAMESPACE_SEPARATOR = "::"

staticconstexprinherited

The C++ namespace separator.

Definition at line 45 of file object.h.

NULL_STR_GENERAL

constexpr std::string_view lsst::gauss2d::Object::NULL_STR_GENERAL = "None"

staticconstexprinherited

Definition at line 46 of file object.h.

PY_NAMESPACE_SEPARATOR

constexpr std::string_view lsst::gauss2d::Object::PY_NAMESPACE_SEPARATOR = "."

staticconstexprinherited

Definition at line 47 of file object.h.

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The documentation for this class was generated from the following files:

• /j/snowflake/release/lsstsw/stack/lsst-scipipe-9.0.0/Linux64/gauss2d_fit/gb58c049af0+ace264a4f2/include/lsst/gauss2d/fit/psfmodel.h
• /j/snowflake/release/lsstsw/stack/lsst-scipipe-9.0.0/Linux64/gauss2d_fit/gb58c049af0+ace264a4f2/src/psfmodel.cc