Inheritance diagram for lsst.meas.extensions.piff.piffPsfDeterminer.PiffPsfDeterminerConfig:
Public Member Functions | |
| setDefaults (self) | |
| validate (self) | |
Public Attributes | |
| stampSize | |
Detailed Description
Definition at line 74 of file piffPsfDeterminer.py.
Member Function Documentation
◆ setDefaults()
| lsst.meas.extensions.piff.piffPsfDeterminer.PiffPsfDeterminerConfig.setDefaults | ( | self | ) |
Definition at line 151 of file piffPsfDeterminer.py.
151 def setDefaults(self):
152 super().setDefaults()
153 # stampSize should be at least 25 so that
154 # i) aperture flux with 12 pixel radius can be compared to PSF flux.
155 # ii) fake sources injected to match the 12 pixel aperture flux get
156 # measured correctly
157 # stampSize should also be at least sqrt(2)*modelSize/samplingSize so
158 # that rotated images have support in the model
159
160 self.stampSize = 25
161 # Resize the stamp to accommodate the model, but only if necessary.
162 if self.useCoordinates == "sky":
163 self.stampSize = max(25, 2*int(0.5*self.modelSize*np.sqrt(2)/self.samplingSize) + 1)
164
◆ validate()
| lsst.meas.extensions.piff.piffPsfDeterminer.PiffPsfDeterminerConfig.validate | ( | self | ) |
Definition at line 165 of file piffPsfDeterminer.py.
165 def validate(self):
166 super().validate()
167
168 if (stamp_size := self.stampSize) is not None:
169 model_size = self.modelSize
170 sampling_size = self.samplingSize
171 if self.useCoordinates == 'sky':
172 min_stamp_size = int(np.sqrt(2) * model_size / sampling_size)
173 else:
174 min_stamp_size = int(model_size / sampling_size)
175
176 if stamp_size < min_stamp_size:
177 msg = (f"PIFF model size of {model_size} is too large for stamp size {stamp_size}. "
178 f"Set stampSize >= {min_stamp_size}"
179 )
180 raise pexConfig.FieldValidationError(self.__class__.modelSize, self, msg)
181
182
Member Data Documentation
◆ debugStarData
|
static |
Initial value:
= pexConfig.Field[bool](
doc="Include star images used for fitting in PSF model object.",
default=False
)
Definition at line 123 of file piffPsfDeterminer.py.
◆ interpolant
|
static |
Initial value:
= pexConfig.Field[str](
doc="GalSim interpolant name for Piff to use. "
"Options include 'Lanczos(N)', where N is an integer, along with "
"galsim.Cubic, galsim.Delta, galsim.Linear, galsim.Nearest, "
"galsim.Quintic, and galsim.SincInterpolant. Ignored if "
"piffPsfConfigYaml is set.",
check=_validateGalsimInterpolant,
default="Lanczos(11)",
)
Definition at line 114 of file piffPsfDeterminer.py.
◆ maxSNR
|
static |
Initial value:
= pexConfig.Field[float](
doc="Rescale the weight of bright stars such that their SNR is less "
"than this value.",
default=200.0
)
Definition at line 101 of file piffPsfDeterminer.py.
◆ minimumUnmaskedFraction
|
static |
Initial value:
= pexConfig.Field[float](
doc="Minimum fraction of unmasked pixels required to use star.",
default=0.5
)
Definition at line 110 of file piffPsfDeterminer.py.
◆ modelSize
|
static |
Initial value:
= pexConfig.Field[int](
doc="Internal model size for PIFF (typically odd, but not enforced). "
"Partially ignored if piffPsfConfigYaml is set.",
default=25,
)
Definition at line 86 of file piffPsfDeterminer.py.
◆ outlierMaxRemove
|
static |
Initial value:
= pexConfig.Field[float](
doc="Max fraction of stars to remove as outliers each iteration. "
"Ignored if piffPsfConfigYaml is set.",
default=0.05
)
Definition at line 96 of file piffPsfDeterminer.py.
◆ outlierNSigma
|
static |
Initial value:
= pexConfig.Field[float](
doc="n sigma for chisq outlier rejection. "
"Ignored if piffPsfConfigYaml is set.",
default=4.0
)
Definition at line 91 of file piffPsfDeterminer.py.
◆ piffLoggingLevel
|
static |
Initial value:
= pexConfig.RangeField[int](
doc="PIFF-specific logging level, from 0 (least chatty) to 3 (very verbose); "
"note that logs will come out with unrelated notations (e.g. WARNING does "
"not imply a warning.)",
default=0,
min=0,
max=3,
)
Definition at line 136 of file piffPsfDeterminer.py.
◆ piffPsfConfigYaml
|
static |
Initial value:
= pexConfig.Field[str](
doc="Configuration file for PIFF in YAML format. This overrides many "
"other settings in this config and is not validated ahead of runtime.",
default=None,
optional=True,
)
Definition at line 144 of file piffPsfDeterminer.py.
◆ samplingSize
|
static |
Initial value:
= pexConfig.Field[float](
doc="Resolution of the internal PSF model relative to the pixel size; "
"e.g. 0.5 is equal to 2x oversampling. This affects only the size of "
"the PSF model stamp if piffPsfConfigYaml is set.",
default=1,
)
Definition at line 80 of file piffPsfDeterminer.py.
◆ spatialOrder
|
static |
Initial value:
= pexConfig.Field[int](
doc="Spatial order for PSF kernel creation. "
"Ignored if piffPsfConfigYaml is set.",
default=2,
)
Definition at line 75 of file piffPsfDeterminer.py.
◆ stampSize
| lsst.meas.extensions.piff.piffPsfDeterminer.PiffPsfDeterminerConfig.stampSize |
Definition at line 160 of file piffPsfDeterminer.py.
◆ useCoordinates
|
static |
Initial value:
= pexConfig.ChoiceField[str](
doc="Which spatial coordinates to regress against in PSF modeling.",
allowed=dict(
pixel='Regress against pixel coordinates',
field='Regress against field angles',
sky='Regress against RA/Dec'
),
default='pixel'
)
Definition at line 127 of file piffPsfDeterminer.py.
◆ zeroWeightMaskBits
|
static |
Initial value:
= pexConfig.ListField[str](
doc="List of mask bits for which to set pixel weights to zero.",
default=['BAD', 'CR', 'INTRP', 'SAT', 'SUSPECT', 'NO_DATA']
)
Definition at line 106 of file piffPsfDeterminer.py.
The documentation for this class was generated from the following file:
- /j/snowflake/release/lsstsw/stack/lsst-scipipe-9.0.0/Linux64/meas_extensions_piff/g0f08755f38+ea96e5a5a3/python/lsst/meas/extensions/piff/piffPsfDeterminer.py
