Figure 3
From: Landmarks or panoramas: what do navigating ants attend to for guidance?
Rotational image differences. Images from the test conditions (i.e., current view) are compared with the 'references images' from the training condition (i.e., memorised view) for every possible rotation. The 'reference images' have been taken along the feeder-nest line and are all facing towards the nest. A. Example of the image differences distribution between a test image and the 'reference image' as a function of the rotation of the test image. The two lowest choices of image differences are indicated by the black (best choice) and grey (second best choice) arrows. '% of panoramic mismatch' indicates the percentage of mismatching pixel across the image. B, C. Black and grey arrows of a given location represent respectively the best and second best matching rotation of a given location when the landmark is displaced by 16° (B) and 32° (C). The length of the arrows is proportional to the matching value.