function [correctedFP]=FPbackgroundsubtract(rawFP)
background = mean(rawFP(:,end-1,:),3);
%Need to make this array the same size as the full array so we can subtract
%arrays rather than using slow looping.
backgroundarray = repmat(meanbackground,[1,size(rawFP,2),size(rawFP,3)]);
correctedFP = rawFP - backgroundarray;