ellipticity

lsst.validate.drp.util.ellipticity(I_xx, I_xy, I_yy)

Calculate ellipticity from second moments.

Parameters:

I_xx : float or numpy.array

I_xy : float or numpy.array

I_yy : float or numpy.array

Returns:

e, e1, e2 : (float, float, float) or (numpy.array, numpy.array, numpy.array)

Complex ellipticity, real component, imaginary component