Figure 5

Comparison of our augmented AAM approach to standard AAMs. The evaluation is based on 32 real-world bird locomotion datasets comprising five species. In (a), the Euclidean point-to-point errors between tracked and ground-truth landmarks are shown as Tukey boxplots grouped by tracking method, bird species, camera view, and landmark group. In (b), qualitative tracking results are shown for the example of a typical jackdaw sequence. Our presented approach clearly outperforms standard AAMs in terms of fitting accuracy. Especially the lower leg landmarks benefit drastically from the augmented method, as the median error is constantly reduced to below 25 pixels for image sizes of 1,536 × 1,024 pixels.