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(a) A 2D DF (J) representing colour and spatial location of objects. A peak in J signifies detection of a blue item (hue 75) at spatial position 25. A 1D DF (I) is coupled to J and activity across J is summed up and forwarded to I to select the colour of the detected object. (b) A 2D field F binds together information about colour of an object in the field I (hue 50) and its spatial location in field B (location 50) through excitatory projections (yellow arrows).
