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. 2016 Sep 1;11(9):e0161602. doi: 10.1371/journal.pone.0161602

Fig 3. SOFI algorithm, cross-cumulant calculation.

Fig 3

The nth order cross-cumulant κn of a pixel δ is calculated as a weighted sum over all partitions of a set G of n pixels. The position of pixel δ is given by the geometrical mean of the n pixels within G. By using different sets of n pixels, the nth order cross-cumulant of an arbitrary large pixel grid can be calculated. Formulas are shown for any n and sketches for n = 4.