quadfit

sofia_redux.toolkit.image.smooth.quadfit(image)

Quick and simple cubic polynomial fit to surface - no checks

Parameters:

imagenumpy.ndarray

Returns:

coefficientsnumpy.ndarray of numpy.float64 (6,)

where:

z = c[0] + c[1].x + c[2].y + c[3].x^2 + c[4].y^2 + c[5].xy