filters.optimalneighborhood

The Optimal Neighborhood filter computes the eigenentropy (defined as the Shannon entropy of the normalized eigenvalues) for a neighborhood of points in the range min_k to max_k. The neighborhood size that minimizes the eigenentropy is saved to a new dimension OptimalKNN. The corresponding radius of the neighborhood is saved to OptimalRadius. These dimensions can be written to an output file or utilized directly by filters.covariancefeatures.

Default Embedded Stage

This stage is enabled by default

Example

[
    "input.las",
    {
        "type":"filters.optimalneighborhood",
        "min_k":8,
        "max_k": 50
    },
    {
        "type":"writers.las",
        "minor_version":4,
        "extra_dims":"all",
        "forward":"all",
        "filename":"output.las"
    }
]

Options

min_k

The minimum number of k nearest neighbors to consider for optimal neighborhood selection. [Default: 10]

max_k

The maximum number of k nearest neighbors to consider for optimal neighborhood selection. [Default: 100]