id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
42	No direct 'c2r' IFFT functionality.	robert.desonia@…	eugene	"I noticed that the latest FFT API defines a complex->complex IFFT operation but
no complex->real IFFT operation.  En lieu of that, however, there is a function
to extract the real portion from the complex result to effectively duplicate the
complex->real IFFT functionality of FFTW.

The problem is that that is most likely going to be more costly than the
straight 'c2r' FFTW function call as the complex component will be calculated
just to be thrown away.  For a 512x512 image on the 2GHz Opteron, the c->c is
about 50% more costly than the c->r FFTW function call (from fftw.org).

Is there a real desire to operate on complex imagery in the spacial domain? 
Should the IFFT direction just result in a psF32 image instead or should a
second function that performs a c->r IFFT be added?

-rdd"	defect	closed	high		PSLib SDRS	unspecified	normal	fixed