hillas_parameters

ctapipe.image.hillas.hillas_parameters(geom, image)

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 fact-project/fact-tools

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

The method also supports giving a full geometry with image as a masked array, however this performs worse than passing geometry and image only for the selected pixels.

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:

HillasParametersContainer:

container of hillas parameters