VIT

Verden, Germany
Verden, Germany

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The invention relates to a method for determining three-dimensional images of an object (Board), comprising projection of several images onto the object by at least one projector (P), each image being determined by modulation of first light patterns; acquisition, for each projected image, of at least one two-dimensional image of the object by at least one image sensor (C), preferably at least two image sensors; and determination of the height of each point of the object from the acquired two-dimensional images as if only the first patterns had been projected, the modulation being selected in such a way that the errors in determination are less than those obtained in the absence of modulation.


Correction of an initial three-dimensional image of a deformed object comprises the provision of a model of the undeformed object comprising first zones, the determination in the initial three-dimensional image of second zones corresponding to the first zones, the determination of a first geometric transformation which maps the second zones to the first zones and the determination of a three-dimensional image corrected on the basis of the first geometric transformation and of the initial three-dimensional image.


The invention relates to a method for identifying a material in a scene, including the following steps: lighting the scene (1); taking at least two simultaneous measurements of the light amplitude of the scene for separate polarisation states of the light using two measurement devices positioned in inclined directions above the normal of the scene; and deducing an identification of the material therefrom.


Patent
Vit | Date: 2014-03-26

An enclosure includes a door for accessing a space for receiving an industrial apparatus in which the door is hinged to a door frame supported by the enclosure by at least one connecting rod, the ends of which are hingedly respectively connected to the door frame and to the rear surface of the door, approximately at the middle of the length thereof


An installation of optical inspection of integrated circuits or the like, comprising: a planar conveyor along a first direction of the objects to be analyzed and a photographic system placed above an area of the conveyor and in a fixed position with respect thereto, the photographic system comprising at least one first set of digital cameras each comprising an orthogonal array of pixels, said cameras being aligned in a second direction different from the first one, the cameras being all oriented so that one of the orthogonal directions of their pixel array forms a first angle with the first direction.


An optical inspection system for an electronic circuit comprises sensors of images of the electronic circuit, at least two supports on which are intended to rest two parts of the electronic circuit and a device for modifying the position of each support, independently of one another.


Patent
Vit | Date: 2014-03-26

A conveyor unit has a conveyor belt comprising, in cross-section, a recess in the upper edge of the belt. In an embodiment, the unit comprises two belts that support the objects to be transported, in particular electronic boards.


Patent
Vit | Date: 2014-03-26

A calibration pattern for an optical system is formed by an anodized metal plate comprising grooves.


Patent
Vit | Date: 2014-04-08

A three-dimensional image acquisition system including: at least two projectors aligned in a direction and suitable for illuminating a scene, the projection axes of the projectors defining a plane for each projector, and being turned toward the scene. A first and second camera are placed on one side of said plane, and a third and fourth camera placed on the other side of said plane. The optical axis of the first and second cameras form, with said plane, a different first and second angle, respectively, and the optical axis of the third and fourth cameras form, with said plane, a different third and fourth angle, respectively.


A method for determining three-dimensional images of an object (Card) comprises projecting a display onto the object by means of a projector (P). A plurality of two-dimensional images of the object are acquired by at least one first image sensor (C), a relative movement of the object in relation to the assembly comprising the projector and the image sensor being carried out during the acquisitions of the images. A determination is made of the height of each point of the object as corresponding to an extremum of a function obtained from the acquired two-dimensional images.

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