hillas_parameters¶

ctapipe.image.hillas.hillas_parameters(geom, image)[source]¶

Compute Hillas parameters for a given shower image.

Implementation uses a PCA analogous to the implementation in src/main/java/fact/features/HillasParameters.java from https://github.com/fact-project/fact-tools

The recommended form is to pass only the sliced geometry and image for the pixels to be considered.

Each method gives the same result, but vary in efficiency

Parameters

geom: ctapipe.instrument.CameraGeometry: Camera geometry, the cleaning mask should be applied to improve performance
imagearray_like: Charge in each pixel, the cleaning mask should already be applied to improve performance.

Returns