Fig. 10.

Examples illustrating the application of detection settings. a Application of different (predefined) settings to a single frame. The active setting is indicated by a larger circle denoting the nose position, a square denoting the body center, and a line connecting them. In the leftmost frame, the active setting is the default (first) setting. In each of the other frames, there is a different active setting. b A sequence of frames with incorrect detection. In this example, the default method fails for the entire segment of frames. c The solution involves three stages. First, a manual position, indicated in yellow, is defined for the first frame in the sequence (4840). Next, setting 3 (pink), is applied to the last frame in the sequence (4845). Finally, the set of frames is defined as a segment (Additional file 1), and the positions within it are interpolated. The interpolated positions are shown in ochre (frames 4841-4844). See the manual for a detailed description of the two available interpolation algorithms