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Diffstat (limited to 'src/python/gudhi/hera/bottleneck.cc')
-rw-r--r-- | src/python/gudhi/hera/bottleneck.cc | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/src/python/gudhi/hera/bottleneck.cc b/src/python/gudhi/hera/bottleneck.cc new file mode 100644 index 00000000..0cb562ce --- /dev/null +++ b/src/python/gudhi/hera/bottleneck.cc @@ -0,0 +1,54 @@ +/* This file is part of the Gudhi Library - https://gudhi.inria.fr/ - which is released under MIT. + * See file LICENSE or go to https://gudhi.inria.fr/licensing/ for full license details. + * Author(s): Marc Glisse + * + * Copyright (C) 2020 Inria + * + * Modification(s): + * - YYYY/MM Author: Description of the modification + */ + +#include <pybind11_diagram_utils.h> + +#ifdef _MSC_VER +// https://github.com/grey-narn/hera/issues/3 +// ssize_t is a non-standard type (well, posix) +using py::ssize_t; +#endif + +#include <bottleneck.h> // Hera + +double bottleneck_distance(Dgm d1, Dgm d2, double delta) +{ + // I *think* the call to request() has to be before releasing the GIL. + auto diag1 = numpy_to_range_of_pairs(d1); + auto diag2 = numpy_to_range_of_pairs(d2); + + py::gil_scoped_release release; + + if (delta == 0) + return hera::bottleneckDistExact(diag1, diag2); + else + return hera::bottleneckDistApprox(diag1, diag2, delta); +} + +PYBIND11_MODULE(bottleneck, m) { + m.def("bottleneck_distance", &bottleneck_distance, + py::arg("X"), py::arg("Y"), + py::arg("delta") = .01, + R"pbdoc( + Compute the Bottleneck distance between two diagrams. + Points at infinity are supported. + + .. note:: + Points on the diagonal are not supported and must be filtered out before calling this function. + + Parameters: + X (n x 2 numpy array): First diagram + Y (n x 2 numpy array): Second diagram + delta (float): Relative error 1+delta + + Returns: + float: (approximate) bottleneck distance d_B(X,Y) + )pbdoc"); +} |