Zernike polynomials

lentil.zernike(mask, index[, normalize, ...])	Compute the circular Zernike polynomial for a given mask.
lentil.zernike_compose(mask, coeffs[, ...])	Create an OPD based on the supplied Zernike coefficients.
lentil.zernike_fit(opd, mask, modes[, ...])	Fit a Zernike basis set to an OPD.
lentil.zernike_remove(opd, mask, modes[, ...])	Fit and remove a Zernike basis set from an OPD.
lentil.zernike_basis(mask, modes[, ...])	Compute a Zernike basis set for a given mask.
lentil.zernike_coordinates(mask[, shift, rotate])	Compute the Zernike coordinate system for a given mask.