Create a snapshot thumbnail from input exposure.
The output thumbnail image is constructed based on the parameters
in the configuration file. Currently, the asinh mapping is the
only mapping method used.
Parameters
----------
exposure : `lsst.afw.image.Exposure`
The exposure to be converted into a thumbnail.
isrQaConfig : `Config`
Configuration object containing all parameters to control the
thumbnail generation.
Returns
-------
rgbImage : `numpy.ndarray`
Binned and scaled version of the exposure, converted to an
integer array to allow it to be written as PNG.
Definition at line 117 of file isrQa.py.