features.hpp File Reference

Header file defining a collection of functions for terrain analysis and feature extraction from heightmaps. More...

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Namespaces
namespace	hmap
namespace	hmap::gpu

Functions
Array	hmap::connected_components (const Array &array, float surface_threshold=0.f, float background_value=0.f)
	Identifies and labels connected components within a binary or labeled array, with optional filtering by size.
Array	hmap::geomorphons (const Array &array, int irmin, int irmax, float epsilon)
	Classifies terrain into geomorphological features based on the geomorphons method.
Array	hmap::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)
	Performs k-means clustering on two input arrays, grouping similar data points into clusters.
Array	hmap::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)
	Performs k-means clustering on three input arrays, providing more detailed cluster analysis by considering an additional dimension.
Array	hmap::local_median_deviation (const Array &array, int ir)
	Computes the local median deviation of a 2D array.
Array	hmap::mean_local (const Array &array, int ir)
	Return the local mean based on a mean filter with a square kernel.
Array	hmap::relative_elevation (const Array &array, int ir)
	Calculates the relative elevation within a specified radius, helping to identify local highs and lows.
Array	hmap::ruggedness (const Array &array, int ir)
	Computes the ruggedness of each element in the input array.
Array	hmap::rugosity (const Array &z, int ir, bool convex=true)
	Estimates the rugosity of a surface by analyzing the skewness of the elevation data, which reflects surface roughness.
Array	hmap::std_local (const Array &array, int ir)
	Computes the local standard deviation of a 2D array.
Array	hmap::valley_width (const Array &z, int ir=0, bool ridge_select=false)
	Measures the valley width by calculating the distance from each point in a concave region to the frontier of that region.
Array	hmap::z_score (const Array &array, int ir)
Array	hmap::gpu::local_median_deviation (const Array &array, int ir)
	See hmap::local_median_deviation.
Array	hmap::gpu::mean_local (const Array &array, int ir)
	See hmap::mean_local.
Array	hmap::gpu::relative_elevation (const Array &array, int ir)
	See hmap::relative_elevation.
Array	hmap::gpu::ruggedness (const Array &array, int ir)
	See hmap::ruggedness.
Array	hmap::gpu::rugosity (const Array &z, int ir, bool convex=true)
	See hmap::rugosity.
Array	hmap::gpu::std_local (const Array &array, int ir)
	See hmap::std_local.
Array	hmap::gpu::z_score (const Array &array, int ir)
	See hmap::z_score.

Detailed Description

Header file defining a collection of functions for terrain analysis and feature extraction from heightmaps.

Author

Otto Link (otto..nosp@m.link.nosp@m..bv@g.nosp@m.mail.nosp@m..com)

Copyright

Copyright (c) 2023 Otto Link