Method and device for measuring the angular position of a rectilinear contrasting edge of an object, and system for fixation and tracking a target comprising at least one such contrasting edge

Lubin Kerhuel (1) , Nicolas Franceschini (1) , Stéphane Viollet (1)

1 ISM - Institut des Sciences du Mouvement Etienne Jules Marey

The present invention relates to a method for measuring the angular position of a contrasting edge of an object having a luminance transition zone which is substantially rectilinear in a given direction and separates two regions of different luminances. This method comprises the functional steps of: - carrying out, in a transverse direction different from the given direction, an amplitude modulation of the signals delivered by a first and a second optical sensor; and - calculating an output signal (Y out (t)) starting from the signals delivered by the first and the second optical sensors (D 1 , D 2 ) as a function of the angular position of the luminance transition zone. Device and set of devices for measuring the angular position of a contrasting edge and steering aid system for fixation and tracking a target comprising at least one such contrasting edge.

Domaines: Traitement du signal et de l'image [eess.SP]; Traitement du signal et de l'image [eess.SP]; Automatique / Robotique; Optique / photonique

Lubin Kerhuel, Nicolas Franceschini, Stéphane Viollet. Method and device for measuring the angular position of a rectilinear contrasting edge of an object, and system for fixation and tracking a target comprising at least one such contrasting edge. France, Patent n° : EP2341312 (A1). 2011, pp.67. ⟨hal-00612379⟩