<P>PROBLEM TO BE SOLVED: To provide a method for extracting an inclination and the degree of freedom of rotation with high reliability from the pressure difference of the hand for assisting a three-dimensional environment navigation and operation. <P>SOLUTION: A method for extracting multiple degree-of-freedom of hand activities from a successive proximity image comprises steps of: tracking a plurality of contacts related to a plurality of hands in the successive proximity image; finding an innermost and an outermost finger contact from the contacts; computing a scaling velocity component from a change in a distance between the innermost and outermost finger contacts; computing a rotational velocity component from a change in a vector angle between the innermost and outermost finger contacts; computing at least one parameter out of a translation weighting for each contacting finger, translational velocity components calculated therefor, and an average of the translational velocity; and transmitting at least one parameter or combinations thereof as control signals to an electronic or electro-mechanical device. <P>COPYRIGHT: (C)2007,JPO&INPIT 
METHOD FOR INTEGRATING MANUAL INPUT