function imageSet = AverageImageSet(originalImageSet, averageInterval)
% imageSet = AverageImageSet(originalImageSet, averageInterval).  
% This function averages the image set based on the given interval.
% Author : Sasakthi Abeysinghe, Timothy Simpson
% Date   : 04/05/2006

disp(strcat('Averaging images using a step of:  ', num2str(averageInterval)));

i = averageInterval;
initialized = 0;
while i <= size(originalImageSet, 2)
    image = double(sum(transpose(originalImageSet(:,i-averageInterval+1:i))))/double(averageInterval);
    if(initialized)
        imageSet = [imageSet; image];
    else
        imageSet = image;
        initialized = 1;
    end
    i = i + averageInterval;
end
if(initialized)
    imageSet = transpose(imageSet);
end 

clear i;
clear initialized;
clear image;