**Akita**** 1984 :** Three fundamental problems of image sequence analysis
are investigated for real world human motions. The first one is the modelling
of body motion, which is approached by the methods of key frame sequence of
stick figures and generalized cone approximation of body parts. The second
problem is the correspondence of feature points in the consecutive frames, for
which a method called 'window code matching' is proposed. The last one is the
analysis of occluding regions, which is studied on the bases of occlusion
prediction by model and difference images.