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. 2016 Mar 9;11(3):e0151194. doi: 10.1371/journal.pone.0151194

Fig 4. Natural images.

Fig 4

a) These images, taken from of different natural environments, are used for simulation. b) A typical sample of 30 x 30 pixel image patches extracted from the natural image (top rightmost) from the position shown by the white rectangle. Each of these patches is broken down to 9 sub-patches of 12 × 12 pixel each with 3 overlapping pixels. Three such sub-patches are shown here by three dotted rectangles in yellow, magenta and white. Each of these sub-patches forms the local input to the 9, level 0 modules in the HPC model network.