Inheritance diagram for lsst.pipe.tasks.matchBackgrounds.MatchBackgroundsConfig:
Detailed Description
Definition at line 34 of file matchBackgrounds.py.
Member Data Documentation
◆ approxWeighting
|
static |
Initial value:
= pexConfig.Field(
dtype=bool,
doc=("Use inverse-variance weighting when approximating background offset model? "
"This will fail when the background offset is constant "
"(this is usually only the case in testing with artificial images)."
"(usePolynomial=True)"),
default=True,
)
Definition at line 124 of file matchBackgrounds.py.
◆ badMaskPlanes
|
static |
Initial value:
= pexConfig.ListField(
doc="Names of mask planes to ignore while estimating the background",
dtype=str, default=["NO_DATA", "DETECTED", "DETECTED_NEGATIVE", "SAT", "BAD", "INTRP", "CR"],
)
Definition at line 47 of file matchBackgrounds.py.
◆ bestRefWeightCoverage
|
static |
Initial value:
= pexConfig.RangeField(
dtype=float,
doc="Weight given to coverage (number of pixels that overlap with patch), "
"when calculating best reference exposure. Higher weight prefers exposures with high coverage."
"Ignored when reference visit is supplied",
default=0.4,
min=0., max=1.
)
Definition at line 101 of file matchBackgrounds.py.
◆ bestRefWeightLevel
|
static |
Initial value:
= pexConfig.RangeField(
dtype=float,
doc="Weight given to mean background level when calculating best reference exposure. "
"Higher weight prefers exposures with low mean background level. "
"Ignored when reference visit is supplied.",
default=0.2,
min=0., max=1.
)
Definition at line 116 of file matchBackgrounds.py.
◆ bestRefWeightVariance
|
static |
Initial value:
= pexConfig.RangeField(
dtype=float,
doc="Weight given to image variance when calculating best reference exposure. "
"Higher weight prefers exposures with low image variance. Ignored when reference visit is supplied",
default=0.4,
min=0., max=1.
)
Definition at line 109 of file matchBackgrounds.py.
◆ binSize
|
static |
Initial value:
= pexConfig.Field(
doc="Bin size for gridding the difference image and fitting a spatial model",
dtype=int,
default=256
)
Definition at line 73 of file matchBackgrounds.py.
◆ gridStatistic
|
static |
Initial value:
= pexConfig.ChoiceField(
dtype=str,
doc="Type of statistic to estimate pixel value for the grid points",
default="MEAN",
allowed={
"MEAN": "mean",
"MEDIAN": "median",
"MEANCLIP": "clipped mean"
}
)
Definition at line 52 of file matchBackgrounds.py.
◆ gridStdevEpsilon
|
static |
Initial value:
= pexConfig.RangeField(
dtype=float,
doc="Tolerance on almost zero standard deviation in a background-offset grid bin. "
"If all bins have a standard deviation below this value, the background offset model "
"is approximated without inverse-variance weighting. (usePolynomial=True)",
default=1e-8,
min=0.
)
Definition at line 132 of file matchBackgrounds.py.
◆ interpStyle
|
static |
Initial value:
= pexConfig.ChoiceField(
dtype=str,
doc="Algorithm to interpolate the background values; ignored if usePolynomial is True"
"Maps to an enum; see afw.math.Background",
default="AKIMA_SPLINE",
allowed={
"CONSTANT": "Use a single constant value",
"LINEAR": "Use linear interpolation",
"NATURAL_SPLINE": "cubic spline with zero second derivative at endpoints",
"AKIMA_SPLINE": "higher-level nonlinear spline that is more robust to outliers",
"NONE": "No background estimation is to be attempted",
}
)
Definition at line 78 of file matchBackgrounds.py.
◆ numIter
|
static |
Initial value:
= pexConfig.Field(
dtype=int,
doc="Number of iterations of outlier rejection; ignored if gridStatistic != 'MEANCLIP'.",
default=2
)
Definition at line 96 of file matchBackgrounds.py.
◆ numSigmaClip
|
static |
Initial value:
= pexConfig.Field(
dtype=int,
doc="Sigma for outlier rejection; ignored if gridStatistic != 'MEANCLIP'.",
default=3
)
Definition at line 91 of file matchBackgrounds.py.
◆ order
|
static |
Initial value:
= pexConfig.Field(
dtype=int,
doc="Order of Chebyshev polynomial background model. Ignored if usePolynomial False",
default=8
)
Definition at line 42 of file matchBackgrounds.py.
◆ undersampleStyle
|
static |
Initial value:
= pexConfig.ChoiceField(
doc="Behaviour if there are too few points in grid for requested interpolation style. "
"Note: INCREASE_NXNYSAMPLE only allowed for usePolynomial=True.",
dtype=str,
default="REDUCE_INTERP_ORDER",
allowed={
"THROW_EXCEPTION": "throw an exception if there are too few points",
"REDUCE_INTERP_ORDER": "use an interpolation style with a lower order.",
"INCREASE_NXNYSAMPLE": "Increase the number of samples used to make the interpolation grid.",
}
)
Definition at line 62 of file matchBackgrounds.py.
◆ usePolynomial
|
static |
Initial value:
= pexConfig.Field(
dtype=bool,
doc="Fit background difference with Chebychev polynomial interpolation "
"(using afw.math.Approximate)? If False, fit with spline interpolation using afw.math.Background",
default=False
)
Definition at line 36 of file matchBackgrounds.py.
The documentation for this class was generated from the following file:
- /j/snowflake/release/lsstsw/stack/lsst-scipipe-8.0.0/Linux64/pipe_tasks/gc07e1c2157+b2dbe6b631/python/lsst/pipe/tasks/matchBackgrounds.py
