title: A marker-free system for the analysis of movement disabilities.
abstract: A major step toward improving the treatments of disabled persons may be achieved by using motion analysis equipment. We are developing such a system. It allows the analysis of plane human motion (e.g. gait) without using the tracking of markers. The system is composed of one fixed camera which acquires an image sequence of a human in motion. Then the treatment is divided into two steps: first, a large number of pixels belonging to the boundaries of the human body are extracted at each acquisition time. Secondly, a two-dimensional model of the human body, based on tapered superquadrics, is successively matched with the sets of pixels previously extracted; a specific fuzzy clustering process is used for this purpose. Moreover, an optical flow procedure gives a prediction of the model location at each acquisition time from its location at the previous time. Finally we present some results of this process applied to a leg in motion.
authors.affiliation: Laboratory of Medical Informatics, University of Burgundy, Dijon, France. llegrand@satie.u-bourgogne.fr
authors.forename: L
authors.initials: L
authors.lastname: Legrand
authors.forename: F
authors.initials: F
authors.lastname: Marzani
authors.forename: L
authors.initials: L
authors.lastname: Dusserre
mesh_terms: D001696:Biomechanical Phenomena; D017143:Fuzzy Logic; D005684:Gait; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008838:Microcomputers; D008954:Models, Biological; D009040:Motion Pictures; D009069:Movement Disorders / Q000503:physiopathology*