Clustering and Postprocessing. a) Induced clustering, where each pixel is assigned to the row of S (see Figure 3) where it has the highest coefficient. b) Visualisation of the signal refinement procedure in postprocessing. The movie matrix is projected onto the top-two signals, t(0), t(1) ∈ T. Every black dot corresponds to a time series (pixel), and all time series that have been selected into T are shown as red dots. After averaging over the time series in the coloured areas, signals are shifted from t(0) to the mean and from t(1) to the mean c) Glomerular map: Induced clustering based on , i.e. after postprocessing. Pixels that do not participate in any mean signal are set to white.