Qualitative analysis by visual inspection of computed trajectories may already
give hints about trends in the data, but it usually does not provide much more
information than can be obtained by looking directly at the image data itself or
projections thereof. Quantitative analyses of the trajectories are required in
order to achieve higher sensitivity in data interpretation and to be able to
perform statistical tests. Of course, which parameters to measure and analyze
depends very much on the research questions underlying a specific experiment.
Here we briefly discuss examples of measurements frequently reported in the
literature.
15.5.1 Geometry Measurements
Once the objects of interest in an image sequence are detected, segmented, and
associated, a