Zernike polynomials#

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