# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see .
#
# Copyright(C) 2013-2018 Max-Planck-Society
#
# NIFTy is being developed at the Max-Planck-Institut fuer Astrophysik
# and financially supported by the Studienstiftung des deutschen Volkes.
from ..operators import InversionEnabler
from .response_operators import LinearizedPowerResponse
def NonlinearPowerCurvature(position, FFT, Instrument, nonlinearity,
Projection, N, T, sample_list, inverter):
result = None
for sample in sample_list:
LinearizedResponse = LinearizedPowerResponse(
Instrument, nonlinearity, FFT, Projection, position, sample)
op = LinearizedResponse.adjoint*N.inverse*LinearizedResponse
result = op if result is None else result + op
result = result*(1./len(sample_list)) + T
return InversionEnabler(result, inverter)