Abstract: Methods and systems for assessing a biological movement are described. The method comprises obtaining a sequence of samples of a signal from a sensor; determining a set of initial parameters from the signal, the initial parameters comprising trajectory, speed, acceleration and direction data for the sequence of samples; segmenting the signal into first layer segments based on changes in the direction of the trajectory of the sequence of samples; segmenting the first layer segments into second layer segments based on the acceleration data; determining target points of the second layer segments using parameters from the first layer segments and the second layer segments; segmenting the first layer segments into third layer segments based on changes in the trajectory or the acceleration of the sequence of samples; and determining a set of output parameters based on the segmenting and the target points, the output parameters comprising timing information and command information for the biological movement.

Abstract: Apparatus and method for comparing a test handwriting signature with a reference signature where each of the test and reference signatures have been acquired by generating three electrical digital position signals characterizing a trajectory of a handwriting signature. The apparatus comprises a device for calculating variations of simple dynamic parameters of the test signature with respect to the simple dynamic parameters of the reference signature, by calculating a first evaluating function C1; a device for comparing C1 with a first threshold value, and rejecting said test signature if C1 passes the first threshold value; a device for calculating local intrinsic correlations of V.sub..sigma. and V.sub..theta.

Abstract: The apparatus and method for digitizing and segmenting a handwriting movement comprises an electrical transducer for generating three electrical digital position signals characterizing a trajectory of the handwriting movement. The apparatus comprises a device for low-pass filtering the electrical signals; a device for deriving the electrical signals by predetermined time and transfer functions for generating V.sub.x and V.sub.y electrical components which represent respectively speeds of the point according to X and Y axes of a cartesian reference; and a device for calculating V.sub..sigma. and V.sub.74 values from the V.sub.x and V.sub.y values. The apparatus also comprises a device for calculating handwritten components and handwritten strings, where each of the handwritten components is delimited by two successive liftings of the point along the trajectory, and each of the handwritten strings is delimited by two successive portions of the trajectory where the V.sub..theta.