Inheritance diagram for lsst.ip.isr.linearize.LinearizeLookupTable:
Public Member Functions | |
| def | __call__ (self, image, kwargs) |
Static Public Attributes | |
| string | LinearityType = "LookupTable" |
Detailed Description
Correct non-linearity with a persisted lookup table.
The lookup table consists of entries such that given
"coefficients" c0, c1:
for each i,j of image:
rowInd = int(c0)
colInd = int(c1 + uncorrImage[i,j])
corrImage[i,j] = uncorrImage[i,j] + table[rowInd, colInd]
- c0: row index; used to identify which row of the table to use
(typically one per amplifier, though one can have multiple
amplifiers use the same table)
- c1: column index offset; added to the uncorrected image value
before truncation; this supports tables that can handle
negative image values; also, if the c1 ends with .5 then
the nearest index is used instead of truncating to the
next smaller index
Definition at line 667 of file linearize.py.
Member Function Documentation
◆ __call__()
| def lsst.ip.isr.linearize.LinearizeLookupTable.__call__ | ( | self, | |
| image, | |||
| kwargs | |||
| ) |
Correct for non-linearity.
Parameters
----------
image : `lsst.afw.image.Image`
Image to be corrected
kwargs : `dict`
Dictionary of parameter keywords:
``"coeffs"``
Columnation vector (`list` or `numpy.array`).
``"table"``
Lookup table data (`numpy.array`).
``"log"``
Logger to handle messages (`lsst.log.Log`).
Returns
-------
output : `bool`
If true, a correction was applied successfully.
Raises
------
RuntimeError:
Raised if the requested row index is out of the table
bounds.
Definition at line 689 of file linearize.py.
Member Data Documentation
◆ LinearityType
|
static |
Definition at line 687 of file linearize.py.
The documentation for this class was generated from the following file:
- python/lsst/ip/isr/linearize.py
