Blob Detection using Filters

TO DO:

% ALGORITHM
% 1. Generate a Laplacian of Gaussian filter.
% 2. Build a Laplacian scale space, starting with some initial scale and going for n iterations:
% 1. Filter image with scale-normalized Laplacian at current scale.
% 2. Save square of Laplacian response for current level of scale space.
% 3. Increase scale by a factor k.
% 3. Perform nonmaximum suppression in scale space.
% 4. Display resulting circles at their characteristic scales.