kernelPca.cc

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/*
 * LSST Data Management System
 *
 * This product includes software developed by the
 * LSST Project (http://www.lsst.org/).
 * See the COPYRIGHT file
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the LSST License Statement and
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 * see <https://www.lsstcorp.org/LegalNotices/>.
 */
#include "pybind11/pybind11.h"
#include "pybind11/eigen.h"
#include "pybind11/stl.h"
 
#include <memory>
#include <string>
 
#include "lsst/afw/image/ImagePca.h"
#include "lsst/afw/math/Kernel.h"
#include "lsst/afw/math/SpatialCell.h"
#include "lsst/ip/diffim/KernelPca.h"
 
namespace py = pybind11;
using namespace pybind11::literals;
 
namespace lsst {
namespace ip {
namespace diffim {
namespace detail {
 
namespace {
 
template <typename PixelT>
void declareKernelPca(py::module& mod, std::string const& suffix) {
    using ImageT = afw::image::Image<PixelT>;
    py::class_<KernelPca<ImageT>, std::shared_ptr<KernelPca<ImageT>>, afw::image::ImagePca<ImageT>> cls(
            mod, ("KernelPca" + suffix).c_str());
 
    cls.def(py::init<bool>(), "constantWeight"_a = true);
 
    cls.def("analyze", &KernelPca<ImageT>::analyze);
}
 
template <typename PixelT>
void declareKernelPcaVisitor(py::module& mod, std::string const& suffix) {
    py::class_<KernelPcaVisitor<PixelT>, std::shared_ptr<KernelPcaVisitor<PixelT>>,
               afw::math::CandidateVisitor>
            cls(mod, ("KernelPcaVisitor" + suffix).c_str());
 
    // note that KernelPcaVisitor<PixelT>::ImageT
    // is always the same (pixels of type lsst::afw::math::Kernel::Pixel, not PixelT)
    using KernelImageT = typename KernelPcaVisitor<PixelT>::ImageT;
    cls.def(py::init<std::shared_ptr<KernelPca<KernelImageT>>>(), "imagePca"_a);
 
    cls.def("getEigenKernels", &KernelPcaVisitor<PixelT>::getEigenKernels);
    cls.def("processCandidate", &KernelPcaVisitor<PixelT>::processCandidate, "candidate"_a);
    cls.def("subtractMean", &KernelPcaVisitor<PixelT>::subtractMean);
    cls.def("returnMean", &KernelPcaVisitor<PixelT>::returnMean);
 
    mod.def("makeKernelPcaVisitor", &makeKernelPcaVisitor<PixelT>, "imagePca"_a);
}
 
}  // namespace lsst::ip::diffim::detail::<anonymous>
 
PYBIND11_MODULE(kernelPca, mod) {
    py::module::import("lsst.afw.image");
    py::module::import("lsst.afw.math");
 
    declareKernelPca<afw::math::Kernel::Pixel>(mod, "D");
    declareKernelPcaVisitor<float>(mod, "F");
}
 
}  // detail
}  // diffim
}  // ip
}  // lsst::ip::diffim::detail