Evaluation: Artifical Data. a) Example sources for the "idle" and "odours" datasets. b) Image from an artificial imaging movie (no noise added). Artificial glomeruli are circular and overlap. c) Consecutive images from an artificial imaging movie (noise with σ = 0.3 added) d) Correlation scores for varying noise levels on the "idle" and "odours" datasets. Left: Correlations scores for data without smoothing by spatial filtering. Right: Smoothing with a Gauss filter improves correlation scores for high noise levels. e) Glomerular map for the "idle" dataset. From left to right: Noise level σ = 0.7, noise level σ = 2 without spatial filtering, noise level σ = 2 with additional spatial filtering.