CONSIDERING IMPERFECTIONS USING 3D IMAGING-SYSTEM IN ANGLE OBTAINING,ANGLE SIGNAL DISTANCE COMPUTING AND MULTIVARIATE DISTANCE GRAPHING

Fields such as medicine, biomechanics or ergonomics need to measure th e positions and the rotational movements of body segments. The aim of this article is to underscore the problem of imperfection on angle mea surement using a three-dimensional television system. First, the error on a single angle value is assessed through the classical Taylor's fo rmula and through a simulating approach. Then the error is considered for an entire signal through either an experimental signals, a specifi c coding technique is suggested. Finally, two graphical pattern are pr oposed th show globally the distance between the signals with regard t o the error.