iris.nodes.vectorization package

Submodules

iris.nodes.vectorization.contouring module

class iris.nodes.vectorization.contouring.ContouringAlgorithm(contour_filters: ~typing.List[~typing.Callable[[~typing.List[~numpy.ndarray]], ~typing.List[~numpy.ndarray]]] = [<function filter_polygon_areas>])[source]

Bases: Algorithm

Implementation of a vectorization process through contouring raster image.

class Parameters(*, contour_filters: List[Callable[[List[ndarray]], List[ndarray]]])[source]

Bases: Parameters

Parameters class of the ContouringAlgorithm class.

contour_filters: List[Callable[[List[ndarray]], List[ndarray]]]
run(geometry_mask: GeometryMask) → GeometryPolygons[source]

Contouring vectorization algorithm implementation.

Parameters:

geometry_mask (GeometryMask) – Geometry segmentation map.

Raises:

VectorizationError – Raised if iris region not segmented or an error occur during iris region processing.

Returns:

Geometry polygons points.

Return type:

GeometryPolygons

iris.nodes.vectorization.contouring.filter_polygon_areas(polygons: List[ndarray], rel_tr: NonNegativeFloat = 0.03, abs_tr: NonNegativeFloat = 0.0) → List[ndarray][source]

Filter out polygons whose area is below either an absolute threshold or a fraction of the largest area.

Parameters:

  • polygons (List[np.ndarray]) – List of polygons to filter.

  • rel_tr (NonNegativeFloat, optional) – Relative threshold. Defaults to 0.03.

  • abs_tr (NonNegativeFloat, optional) – Absolute threshold. Defaults to 0.0.

Returns:

Filtered polygons’ list.

Return type:

List[np.ndarray]

Module contents