function imageSet = PerformPreProcessing(original, preprocessingType)
% imageSet = PerformPreProcessing(original, preprocessingType).
% This function performs pre-processing operations on the image set and
% returns the filtered image set.
% The following pre-processing types are handled
%         1 - No pre-processing
%         2 - Averaging the images along 3 images - (15 mins)
%         3 - Averaging the images along 12 images - (1 Hour)
%         4 - Getting the difference between consecutive frames
%         5 - Getting the difference between consecutive hourly averages.  
% Author : Sasakthi Abeysinghe, Timothy Simpson
% Date   : 04/05/2006

disp('Pre-Processing images');
switch preprocessingType
    case 1
        imageSet = original;
    case 2
        imageSet = AverageImageSet(original, 3);
    case 3
        imageSet = AverageImageSet(original, 12);
    case 4
        imageSet = FrameDifferences(original);
    case 5
        imageSet = FrameDifferences(AverageImageSet(original, 12));
end
disp('Pre-processing complete');