Figure 7.
The panorama and gaze directions at moments when ants reverse scanning direction. (a) The panoramic scene at the nest facing south (left), west (centre) and north (right) as reconstructed within the three-dimensional model of the area. Bottom row shows the scene filtered with 3° of resolution. (b) Local panoramic views acquired from the panoramic imager (top row images) and as reconstructed in the three-dimensional model (second row images). Yellow and red lines are the rotational image difference functions at these locations relative to the nest views shown in (a). Below images: frequency histograms of gaze directions (red line histograms) at the moment of reversal of scanning direction (see red dots in (c)) at the different release sites. Blue line shows pixel values (from 0 to 255) along horizontal transects through the reconstructed views (indicated by blue dotted lines in second row of panoramas). Reversals were determined over the whole scanning period on platforms. Number of ants given as n, number of reversals as nrev. (c) Examples of gaze directions over time (time running from bottom to top along the vertical axis) at the three release sites. Reversal of scanning directions are marked by red dots.