def _init_phasing_algorithms(self):
if not self._phasing_algorithms_dirty:
self._log("Phasing algorithms already initialised.","DEBUG")
return
i = 0
for alg_conf in self._phasing_algorithms_configs:
alg = dict(alg_conf)
if alg_conf["number_of_iterations"] is None:
if len(self._phasing_algorithms_configs) == 1:
alg["number_of_iterations"] = self._number_of_iterations
else:
self._log("Number of iterations can not be None if many phasing algorithms are specified. Please report this error.","ERROR")
return
# constraints
constraints = spimage.SpNoConstraints
if "constraints" in alg:
if "enforce_positivity" in alg["constraints"] and "enforce_real" in alg["constraints"]:
constraints |= spimage.SpPositiveRealObject
elif "enforce_real" in alg["constraints"]:
constraints |= spimage.SpRealObject
elif "enforce_positivity" in alg["constraints"]:
constraints |= spimage.SpPositiveComplexObject
if "enforce_centrosymmetry" in alg["constraints"]:
constraints |= spimage.SpCentrosymmetricObject
# phasing algorithm
if alg["type"] in ["raar","hio","diffmap"]:
alg["beta"] = spimage.sp_smap_alloc(1)
spimage.sp_smap_insert(alg["beta"], i,alg["beta_init"])
spimage.sp_smap_insert(alg["beta"], i+alg["number_of_iterations"], alg["beta_final"])
if alg["type"] == "raar":
alg["spimage_phasing"] = spimage.sp_phasing_raar_alloc(alg["beta"], constraints)
elif alg["type"] == "hio":
alg["spimage_phasing"] = spimage.sp_phasing_hio_alloc(alg["beta"], constraints)
elif alg["type"] == "diffmap":
alg["spimage_phasing"] = spimage.sp_phasing_diff_map_alloc(alg["beta"], alg["gamma1"], alg["gamma2"], constraints)
elif alg["type"] == "er":
alg["spimage_phasing"] = spimage.sp_phasing_er_alloc(constraints)
else:
self._log("Phasing algorithm %s not implemented. Please report this error!" % type,"ERROR")
return
i += alg["number_of_iterations"]
self._phasing_algorithms.append(alg)
self._phasing_algorithms_dirty = False
self._log("Phasing algorithm initialised.","DEBUG")
def _init_phasing_algorithms(self):
if not self._phasing_algorithms_dirty:
self._log("Phasing algorithms already initialised.","DEBUG")
return
i = 0
for alg_conf in self._phasing_algorithms_configs:
alg = dict(alg_conf)
if alg_conf["number_of_iterations"] is None:
if len(self._phasing_algorithms_configs) == 1:
alg["number_of_iterations"] = self._number_of_iterations
else:
self._log("Number of iterations can not be None if many phasing algorithms are specified. Please report this error.","ERROR")
return
# constraints
constraints = spimage.SpNoConstraints
if "constraints" in alg:
if "enforce_positivity" in alg["constraints"] and "enforce_real" in alg["constraints"]:
constraints |= spimage.SpPositiveRealObject
elif "enforce_real" in alg["constraints"]:
constraints |= spimage.SpRealObject
elif "enforce_positivity" in alg["constraints"]:
constraints |= spimage.SpPositiveComplexObject
if "enforce_centrosymmetry" in alg["constraints"]:
constraints |= spimage.SpCentrosymmetricObject
# phasing algorithm
if alg["type"] in ["raar","hio","diffmap"]:
alg["beta"] = spimage.sp_smap_alloc(1)
spimage.sp_smap_insert(alg["beta"], i,alg["beta_init"])
spimage.sp_smap_insert(alg["beta"], i+alg["number_of_iterations"], alg["beta_final"])
if alg["type"] == "raar":
alg["spimage_phasing"] = spimage.sp_phasing_raar_alloc(alg["beta"], constraints)
elif alg["type"] == "hio":
alg["spimage_phasing"] = spimage.sp_phasing_hio_alloc(alg["beta"], constraints)
elif alg["type"] == "diffmap":
alg["spimage_phasing"] = spimage.sp_phasing_diffmap_alloc(alg["beta"], alg["gamma1"], alg["gamma2"], constraints)
elif alg["type"] == "er":
alg["spimage_phasing"] = spimage.sp_phasing_er_alloc(constraints)
else:
self._log("Phasing algorithm %s not implemented. Please report this error!" % type,"ERROR")
return
i += alg["number_of_iterations"]
self._phasing_algorithms.append(alg)
self._phasing_algorithms_dirty = False
self._log("Phasing algorithm initialised.","DEBUG")
def get_basic_phaser(amplitudes, support, mask=None):
"""This function is not finished"""
if mask is None:
amplitudes_sp = image_from_array(amplitudes)
else:
amplitudes_sp = image_from_array(amplitudes, mask)
beta = _spimage.sp_smap_alloc(1)
_spimage.sp_smap_insert(beta, 0, 0.9)
phase_alg = _spimage.sp_phasing_hio_alloc(beta, _spimage.SpNoConstraints)
support_sp = image_from_array(support)
sup_alg = _spimage.sp_support_array_init(_spimage.sp_support_static_alloc(), 20)
phaser = _spimage.sp_phaser_alloc()
_spimage.sp_phaser_init(phaser, phase_alg, sup_alg, _spimage.SpEngineCUDA)
_spimage.sp_phaser_set_amplitudes(phaser, amplitudes_sp)
_spimage.sp_phaser_init_model(phaser, None, _spimage.SpModelRandomPhases)
_spimage.sp_phaser_init_support(phaser, support_sp, 0, 0)
return phaser
def get_basic_phaser(amplitudes, support, mask=None, algorithm=None):
"""This function is not finished"""
if mask is None:
amplitudes_sp = image_from_array(amplitudes)
else:
amplitudes_sp = image_from_array(amplitudes, mask)
if algorithm is None:
beta = _spimage.sp_smap_alloc(1)
_spimage.sp_smap_insert(beta, 0, 0.9)
phase_alg = _spimage.sp_phasing_hio_alloc(beta,
_spimage.SpNoConstraints)
else:
phase_alg = algorithm
support_sp = image_from_array(support)
sup_alg = _spimage.sp_support_array_init(
_spimage.sp_support_static_alloc(), 20)
phaser = _spimage.sp_phaser_alloc()
_spimage.sp_phaser_init(phaser, phase_alg, sup_alg, _spimage.SpEngineCUDA)
_spimage.sp_phaser_set_amplitudes(phaser, amplitudes_sp)
_spimage.sp_phaser_init_model(phaser, None, _spimage.SpModelRandomPhases)
_spimage.sp_phaser_init_support(phaser, support_sp, 0, 0)
return phaser
def algorithm_hio(beta, real=False, positive=False):
"""Create an HIO algorithm object"""
beta_sp = smap(beta)
constraints = get_constraints(real, positive)
algorithm = _spimage.sp_phasing_hio_alloc(beta_sp, constraints)
return algorithm
support_file = os.path.join(INPUT_DIR, 'particle_support.h5')
support_raw = spimage.sp_image_read(support_file, 0)
support = spimage.sp_image_shift(support_raw)
sup_alg_static = spimage_tools.support_static() # Our support is static
# phasing algorithm
# beta is a constant, 0.9, but in a format that spimage can read
beta = spimage_tools.smap(0.9)
# constraints = spimage.SpNoConstraints
# constraints = spimage.SpPositiveComplexObject
# Additional constraints, other than Fourier-constraint or Real-constraint.
constraints = spimage.SpPositiveRealObject
phase_alg_main = spimage.sp_phasing_hio_alloc(beta, constraints)
phase_alg_refine = spimage.sp_phasing_er_alloc(constraints)
# create phaser
phaser = spimage.sp_phaser_alloc()
spimage.sp_phaser_init(phaser, phase_alg_main, sup_alg_static,
spimage.SpEngineCUDA)
spimage.sp_phaser_set_amplitudes(phaser, amplitudes)
spimage.sp_phaser_init_model(phaser, None, spimage.SpModelRandomPhases)
spimage.sp_phaser_init_support(phaser, support, 0, 0)
def run_it(number_of_iterations):
spimage.sp_phaser_iterate(phaser, number_of_iterations)
def algorithm_hio(beta, real=False, positive=False):
"""Create an HIO algorithm object"""
beta_sp = smap(beta)
constraints = get_constraints(real, positive)
algorithm = _spimage.sp_phasing_hio_alloc(beta_sp, constraints)
return algorithm
