id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
227	psReadoutCombine() questions	gusciora@…	Paul Price	"What are the valid types for parameters:
    output
    inputs
    zero
    scale

What are the valid ranges for input parameters:
    gain
    readnoise

The SDR states that if the input parameters are not of the same size, then an
error should be stated.  It also states that input images need not be of the
same size.  Which input parameters must be of the same size?  How should the
offsets be used in determining whether the input images are of the correct
size?

How should the zero vector be added to the input images?  Does this vector
have one element per input image, or per row, or per column?  Does this
addition happen after the pixels outside (fracLow, fracHigh) are rejected. or
before?

How should the scale vector multiply the input images?  Does this vector have
one element per input image, or per row, or per column?  Does this multiply
happen after the pixels outside (fracLow, fracHigh) are rejected. or before?

How are the various offsets in the input readouts, and the input images used,
along with pixel coordinates in those images, be used in determing which
!es correspond to which pixels in putout images?  What is the formula?

How is the noise to be used?"	defect	closed	high		PSLib ADD	unspecified	normal	fixed