poppy.measure_fwhm(HDUlist_or_filename=None, ext=0, center=None, level=0.5)[source]

Measure FWHM by interpolation of the radial profile

This measures the full width at half maximum for the supplied PSF, or optionally the full width at some other fraction of max.


HDUlist_or_filename, ext : string, int

Same as above

center : tuple

center to compute around. Default is image center.

level : float

Fraction of max to compute for; default is 0.5 for Half Max. You can also measure widths at other levels e.g. FW at 10% max by setting level=0.1

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