From skylight input to behavioural output: A computational model of the insect polarised light compass
Fig 11
Optimal compass structural parameters.
The performance of the compass for different topological parameters. (A) Values of the objective function on the ω × n plane; red shades illustrate the degree of error; black arrows show the axes; the green line shows the receptive field value associated with the minimum error for different number of units. (B) The error as a function of the number of units, n; the receptive field is fixed at ω = 56°; inset demonstrates the 56° wide sensor with n = 360 units; with green are marked the 60 units closest to the ones we chose. (C) The error as a function of the receptive field, ω; the resolution (ratio between ω and n) is fixed so that the number of units is n = 60 for ω = 56°; inset demonstrates the different visual fields including the optimal one with n = 60 units.