features.hpp

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/* Copyright (c) 2023 Otto Link. Distributed under the terms of the GNU General
   Public License. The full license is in the file LICENSE, distributed with
   this software. */
 
#pragma once
#include <array>
 
#include "highmap/array.hpp"
 
#define HMAP_PACK8(a, b, c, d, e, f, g, h)                                     \
  ((a << 15) + (b << 13) + (c << 11) + (d << 9) + (e << 7) + (f << 5) +        \
   (g << 3) + (h << 1))
 
namespace hmap
{
 
Array connected_components(
    const Array                       &array,
    float                              surface_threshold = 0.f,
    float                              background_value = 0.f,
    std::vector<float>                *p_surfaces = nullptr,
    std::vector<std::array<float, 2>> *p_centroids = nullptr);
 
Array geomorphons(const Array &array, int irmin, int irmax, float epsilon);
 
Array kmeans_clustering2(const Array        &array1,
                         const Array        &array2,
                         int                 nclusters,
                         std::vector<Array> *p_scoring = nullptr,
                         Array              *p_aggregate_scoring = nullptr,
                         Vec2<float>         weights = {1.f, 1.f},
                         uint                seed = 1);
 
Array kmeans_clustering3(const Array        &array1,
                         const Array        &array2,
                         const Array        &array3,
                         int                 nclusters,
                         std::vector<Array> *p_scoring = nullptr,
                         Array              *p_aggregate_scoring = nullptr,
                         Vec3<float>         weights = {1.f, 1.f, 1.f},
                         uint                seed = 1);
 
Array local_median_deviation(const Array &array, int ir);
 
Array mean_local(const Array &array, int ir);
 
Array relative_elevation(const Array &array, int ir);
 
Array ruggedness(const Array &array, int ir);
 
Array rugosity(const Array &z, int ir, bool convex = true);
 
Array std_local(const Array &array, int ir);
 
Array valley_width(const Array &z, int ir = 0, bool ridge_select = false);
 
Array z_score(const Array &array, int ir);
 
} // namespace hmap
 
namespace hmap::gpu
{
 
Array local_median_deviation(const Array &array, int ir);
 
Array mean_local(const Array &array, int ir);
 
Array relative_elevation(const Array &array, int ir);
 
Array ruggedness(const Array &array, int ir);
 
Array rugosity(const Array &z, int ir, bool convex = true);
 
Array std_local(const Array &array, int ir);
 
Array z_score(const Array &array, int ir);
 
} // namespace hmap::gpu