id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
1315	pattern noise subtraction removed mean background signal	eugene	price@…	the pattern noise subtraction code results in a zero mean background.  for cells.  as a result, the background statistics from the chip stage reported to the ipp database are meaningless.  we probably want to either add back in a constant mean value for the cell, or maybe even a low-frequency y-direction model.	defect	closed	high		ppImage		major	fixed