number_of_islands

ctapipe.image.number_of_islands(geom, mask)

Search a given pixel mask for connected clusters. This can be used to separate between gamma and hadronic showers.

Parameters:

geomCameraGeometry

Camera geometry information, needs to be the full camrea geometry, not already masked with mask

maskndarray

input mask (array of booleans) of pixels surviving the cleaning

Returns:

n_islandsint

Total number of clusters

island_labelsndarray

Contains cluster membership of each pixel. Dimension equals input geometry. Entries range from 0 (not in the pixel mask) to n_islands.