Centre National De La Recherche Scientifique

Sorbonne Université

Université Pierre Et Marie Curie (paris 6)

Université Pierre Et Marie Curie

Ni Zhenjiang

Ryad Benosman

Stéphane Regnier

Cécile Pacoret

Ieng Siohoi

Siohoi Ieng

Method for visual tracking of at least one object represented by a cluster of points with which information is associated, characterised in that it includes steps to: receive (E) data representing a set of space-time events, determine (E) the probability that an event in the set belongs to the cluster of points representing the at least one object, for each event in the received set, determine (E) whether or not an event belongs to the cluster of points as a function of the determined probability for the event considered, for each event in the received set, update (E) information associated with the cluster of points for at least one object, for each event for which it was determined in the previous step that it belongs to the cluster of points, calculate (E, E) the position, size and orientation of the at least one object as a function of the updated information.

Visual tracking of an object

Asynchronous information is provided by a sensor having a matrix of pixels disposed opposite the scene. The asynchronous information includes, for each pixel of the matrix, successive events originating from this pixel, that may depend on variations of light in the scene. A model representing the tracked shape of an object is updated after detecting events attributed to this object in the asynchronous information. Following detection, the updating of the model includes an association of a point of the model with the event detected by minimizing a criterion of distance with respect to the pixel of the matrix from which the detected event originates. The updated model is then determined as a function of the pixel of the matrix from which the detected event originates and attributed to the object and of the associated point in the model, independently of the associations performed before the detection of this event.

Method of tracking shape in a scene observed by an asynchronous light sensor

Method for visual tracking of at least one object represented by a cluster of points with which information is associated, characterized in that it includes steps to: receive (E1) data representing a set of space-time events, determine (E2) the probability that an event in the set belongs to the cluster of points representing the at least one object, for each event in the received set, determine (E3) whether or not an event belongs to the cluster of points as a function of the determined probability for the event considered, for each event in the received set, update (E4) information associated with the cluster of points for at least one object, for each event for which it was determined in the previous step that it belongs to the cluster of points, calculate (E4, E5) the position, size and orientation of the at least one object as a function of the updated information.

Growing community of inventors

Maisons Alfort, France

Ni Zhenjiang