stack averaging

Posted by Jeff Spector-2 on Dec 10, 2014; 2:55am
URL: http://imagej.273.s1.nabble.com/stack-averaging-tp5010869.html

I'd like to average the frames in a stack but all I can find are "walking"
averagers where they will average say frames1-4 then 2-5 etc.. what I'd
like to do is take the average of frames 1-4 then 5-8
and so on, so that we can take data that is say at a frame fate of 4 fps
and make it look like it was taken at 1 fps (to reduce the noise in our
images and because we record things at different frame rates). So
essentially if we were doing say 4 frame averaging then a 100 frame stack
would turn in to a 25 frame stack where each slice was the average of 4
consecutive frames.
I could write a plugin to do this, but if one exists, or there is a macro I
could use can some one point me in the right direction ?
thanks..
-Jeff

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