LSSTApplications
17.0+11,17.0+34,17.0+56,17.0+57,17.0+59,17.0+7,17.0-1-g377950a+33,17.0.1-1-g114240f+2,17.0.1-1-g4d4fbc4+28,17.0.1-1-g55520dc+49,17.0.1-1-g5f4ed7e+52,17.0.1-1-g6dd7d69+17,17.0.1-1-g8de6c91+11,17.0.1-1-gb9095d2+7,17.0.1-1-ge9fec5e+5,17.0.1-1-gf4e0155+55,17.0.1-1-gfc65f5f+50,17.0.1-1-gfc6fb1f+20,17.0.1-10-g87f9f3f+1,17.0.1-11-ge9de802+16,17.0.1-16-ga14f7d5c+4,17.0.1-17-gc79d625+1,17.0.1-17-gdae4c4a+8,17.0.1-2-g26618f5+29,17.0.1-2-g54f2ebc+9,17.0.1-2-gf403422+1,17.0.1-20-g2ca2f74+6,17.0.1-23-gf3eadeb7+1,17.0.1-3-g7e86b59+39,17.0.1-3-gb5ca14a,17.0.1-3-gd08d533+40,17.0.1-30-g596af8797,17.0.1-4-g59d126d+4,17.0.1-4-gc69c472+5,17.0.1-6-g5afd9b9+4,17.0.1-7-g35889ee+1,17.0.1-7-gc7c8782+18,17.0.1-9-gc4bbfb2+3,w.2019.22
LSSTDataManagementBasePackage
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Classes | |
class | CrosstalkConfig |
class | CrosstalkTask |
class | NullCrosstalkTask |
Functions | |
def | extractAmp (image, amp, corner, isTrimmed=False) |
def | calculateBackground (mi, badPixels=["BAD"]) |
def | subtractCrosstalk (exposure, badPixels=["BAD"], minPixelToMask=45000, crosstalkStr="CROSSTALK", isTrimmed=False, backgroundMethod="None") |
def | writeCrosstalkCoeffs (outputFileName, coeff, det=None, crosstalkName="Unknown", indent=2) |
Variables | |
dictionary | X_FLIP |
dictionary | Y_FLIP |
def lsst.ip.isr.crosstalk.calculateBackground | ( | mi, | |
badPixels = ["BAD"] |
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) |
Calculate median background in image Getting a great background model isn't important for crosstalk correction, since the crosstalk is at a low level. The median should be sufficient. Parameters ---------- mi : `lsst.afw.image.MaskedImage` MaskedImage for which to measure background. badPixels : `list` of `str` Mask planes to ignore. Returns ------- bg : `float` Median background level.
Definition at line 154 of file crosstalk.py.
def lsst.ip.isr.crosstalk.extractAmp | ( | image, | |
amp, | |||
corner, | |||
isTrimmed = False |
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) |
Return an image of the amp The returned image will have the amp's readout corner in the nominated `corner`. Parameters ---------- image : `lsst.afw.image.Image` or `lsst.afw.image.MaskedImage` Image containing the amplifier of interest. amp : `lsst.afw.table.AmpInfoRecord` Amplifier information. corner : `lsst.afw.table.ReadoutCorner` or `None` Corner in which to put the amp's readout corner, or `None` for no flipping. isTrimmed : `bool` The image is already trimmed. This should no longer be needed once DM-15409 is resolved. Returns ------- output : `lsst.afw.image.Image` Image of the amplifier in the standard configuration.
Definition at line 122 of file crosstalk.py.
def lsst.ip.isr.crosstalk.subtractCrosstalk | ( | exposure, | |
badPixels = ["BAD"] , |
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minPixelToMask = 45000 , |
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crosstalkStr = "CROSSTALK" , |
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isTrimmed = False , |
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backgroundMethod = "None" |
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) |
Subtract the intra-CCD crosstalk from an exposure We set the mask plane indicated by ``crosstalkStr`` in a target amplifier for pixels in a source amplifier that exceed `minPixelToMask`. Note that the correction is applied to all pixels in the amplifier, but only those that have a substantial crosstalk are masked with ``crosstalkStr``. The uncorrected image is used as a template for correction. This is good enough if the crosstalk is small (e.g., coefficients < ~ 1e-3), but if it's larger you may want to iterate. This method needs unittests (DM-18876), but such testing requires DM-18610 to allow the test detector to have the crosstalk parameters set. Parameters ---------- exposure : `lsst.afw.image.Exposure` Exposure for which to subtract crosstalk. badPixels : `list` of `str` Mask planes to ignore. minPixelToMask : `float` Minimum pixel value (relative to the background level) in source amplifier for which to set ``crosstalkStr`` mask plane in target amplifier. crosstalkStr : `str` Mask plane name for pixels greatly modified by crosstalk. isTrimmed : `bool` The image is already trimmed. This should no longer be needed once DM-15409 is resolved. backgroundMethod : `str` Method used to subtract the background. "AMP" uses amplifier-by-amplifier background levels, "DETECTOR" uses full exposure/maskedImage levels. Any other value results in no background subtraction.
Definition at line 180 of file crosstalk.py.
def lsst.ip.isr.crosstalk.writeCrosstalkCoeffs | ( | outputFileName, | |
coeff, | |||
det = None , |
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crosstalkName = "Unknown" , |
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indent = 2 |
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) |
Write a yaml file containing the crosstalk coefficients The coeff array is indexed by [i, j] where i and j are amplifiers corresponding to the amplifiers in det Parameters ---------- outputFileName : `str` Name of output yaml file coeff : `numpy.array(namp, namp)` numpy array of coefficients det : `lsst.afw.cameraGeom.Detector` Used to provide the list of amplifier names; if None use ['0', '1', ...] ccdType : `str` Name of CCD, used to index the yaml file If all CCDs are identical could be the type (e.g. ITL) indent : `int` Indent width to use when writing the yaml file
Definition at line 269 of file crosstalk.py.
dictionary lsst.ip.isr.crosstalk.X_FLIP |
Definition at line 111 of file crosstalk.py.
dictionary lsst.ip.isr.crosstalk.Y_FLIP |
Definition at line 113 of file crosstalk.py.