Commissariat a L'energie Atomique Et Aux Energies Alternatives

Commissariat a L'energie Atomique

Compagnie Generale Des Etablissements Michelin

Michelin Recherche Et Technique S.a.

Societe Detechnologie Michelin

François Gaspard

Alexandre Joly

Steve Bourgeois

Patrick Sayd

Christian Leobal

Claire Moreau

Régis Vinciguerra

Sylvie Naudet

Adrien Bartoli

Julien Michot

Eric Noirfalise

A method and a system are provided integrating inter-pose constraints, which are weighted in a step of 'bundle adjustment' in a localization application (SLAM). The inertial data associated with a motion model serve to predict the pose of the system at the instant of a new image. This prediction is then used to construct an inter-pose constraint. A technique arising from learning theory selects the weighting coefficient (ratio of the noise of the covariance signals) in an efficient manner. The inter-pose constraint thus weighted is then integrated within the cost function of the bundle adjustment.

Method and system for fusing data arising from image sensors and from motion or position sensors

Method for inspecting a zone of the surface of a tire, said surface comprising markings in relief, wherein the three-dimensional profile of the surface to be inspected is determined, characteristic points on the surface to be inspected are located and these points are matched with the corresponding points originating from the three-dimensional data of a reference surface, so as to create a set of pairs of matched points, in an iterative manner, a first affine transformation function is sought, applied to the characteristic points of the reference surface, so that the value representing the sum of the distances between each of the characteristic points of the reference surface, which points are transformed with the aid of said first transformation function, and the points of the surface to be inspected that are matched with them, is minimal, and said first transformation function is applied to all of the points of the reference surface in order to obtain a transformed reference surface.

Method for processing a three-dimensional image of the surface of a tire so that it can be used to inspect the said surface

A coded target used in photogrammetry, the target being circular and including at least two concentric coding rings with at least two equal angular sectors, arranged around a central area including a central disk with a uniform color surrounded by a ring with a complementary color, itself surrounded by a ring the same color as the central disk. A photogrammetry process automatically detects and identifies targets.

Coded target and photogrammetry method using such targets

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Les Ulis, France

François Gaspard