Abstract: The invention relates to a method for analyzing a multispectral image (10), which includes designing a detection image from the values of a revealing function that quantifies a content shift in the multispectral image between two areas. The revealing function is applied between a target area and a background area, inside a window which is determined around each pixel. The revealing function values are determined from integral images of order one, and optionally also of order two, which in turn are calculated only once initially, so that the total amount of calculations is reduced. The analysis method is compatible with a real-time implementation during a capture of consecutive multispectral images which form a video stream, in particular for an environment-monitoring task.

Abstract: The invention relates to a method for analysing a multispectral image (10), which includes designing a detection image from the values of a revealing function that quantifies a content shift in the multispectral image between two areas. The revealing function is applied between a target area and a background area, inside a window which is determined around each pixel. The revealing function values are determined from integral images of order one, and optionally also of order two, which in turn are calculated only once initially, so that the total amount of calculations is reduced. The analysis method is compatible with a real-time implementation during a capture of consecutive multispectral images which form a video stream, in particular for an environment-monitoring task.

Abstract: The invention relates to a method for analysing a multispectral image (10), which includes designing a detection image from signal-to-noise ratio values. The signal-to-noise ratio values relate to the content of the multispectral image inside a window which is determined around each pixel, when the contrast in the window is maximised by a Fischer projection. The signal-to-noise ratio values are calculated from integral images of order one and two, which in turn are calculated only once initially, so that the total amount of calculations is reduced. The analysis method is compatible with a real-time implementation during a capture of consecutive multispectral images which form a video stream, in particular for an environment-monitoring task.

Abstract: The inventive method for viewing of a multi-spectral image by an operator uses contrast optimisation by Fisher projection. The Fisher projection is determined and applied within a window (F1, F2, F3, . . . ) that is smaller than a display screen matrix (1) used by the operator. The window is moved for successive updates of a depiction of the image that is displayed, while creating a remanence of the positions of the earlier windows and elements that were exposed in some of said earlier windows. The implementation of the method is particularly simple and intuitive for the operator, so as to improve the reliability and effectiveness of his or her monitoring.

Abstract: The invention concerns a method for detecting a failure in a three-phase alternator connected to a three-phase rectifier bridge. The method comprises the following steps:—rectifying (70) the voltages generated by the three-phase alternator;—adding (76) the rectified voltages taken at the first and second phases in order to obtain a voltage sum;—subtracting (78), from said voltage sum, twice the rectified voltage taken at the third phase, in order to obtain a voltage difference;—comparing (80) the voltage difference to a high threshold and a low threshold;—detecting (82) a failure when the voltage difference is less than said low threshold or when the voltage difference is greater than said mot threshold. The invention also concerns a device for detecting failures and an associated computer programme.

Abstract: The invention relates to a fly-by-wire system which comprises: three-stage piloting control, each stage including a control computer suitable for determining the positions of the stick, and a monitoring computer capable of verifying all the pre-determined positions of the stick; three-stage control-surface position calculation, each stage including a control computer suitable for calculating the control-surface positions from encoded positions of the stick, and a monitoring computer capable of verifying all the calculated control-surface positions; a single unidirectional communication link connecting the control computer of the first piloting control stage to the control computer of the first control-surface position calculation stage; a single unidirectional communication link connecting the control computer of the second piloting control stage to the control computer of the second control-surface position calculation stage; and a single unidirectional communication link connecting the control computer of t

Abstract: A field changer device (4) comprising: a rotary magazine (5) of spherical general shape mounted so as to rotate about a rotation axis (R) coincident with an axis of symmetry of the magazine (5), which is inclined to a fixed principal optical axis (X); and at least three optical channels (A, B, C) provided in said magazine (5) and having concurrent respective optical axes (XA, XB, XC) inclined at the same angle (?) to the rotation axis (R), it being possible for said magazine (5) to rotate about its rotation axis (R) through predetermined rotation angles (?1, ?2, ?3) in order to place each of the optical channels (A, B, C) alternately along the principal optical axis (X), the optical channels (A, B, C) being arranged in the magazine (5) in such a way that at least two of the rotation angles (?1, ?2, ?3) of the magazine (5) are different.

Abstract: Device with integrated electronic components, that comprises a board forming a support for the said components, a cover mounted on the said board to cover the said components, and a separating partition which extends from the cover to the board substantially perpendicularly to the latter, the said partition separating two distinct zones of the board, wherein it comprises an overcover covering the cover and defining an internal space between the cover and the overcover in which are provided cooling gas division means delimiting two distinct secondary spaces in the internal space, an upstream secondary space into which cooling gas is able to be injected and a downstream secondary space into which cooling gas is able to be discharged so that cooling gas injected into the upstream zone of the board is directed toward the downstream secondary space of the internal space and that cooling gas injected into the upstream secondary space of the internal space is directed toward the downstream zone of the board.

Abstract: A device for artificially restoring an opposing force for a device for remotely controlling an aircraft control surface, the device comprising: an actuator member (1) mounted to pivot about an axis (2) and entrain a rotary shaft (3); a stationary finger (8) parallel to said shaft (3) and supported at a radial distance from the shaft; a moving finger (5) secured to the shaft and supported at the same radial distance as the stationary finger, both fingers being parallel to the shaft; a slab (9) supported at the same radial distance as the fingers and disposed beside them; a first spring (11) between the stationary finger and the slab; and a second spring (10) between the moving finger and the slab.

Abstract: An optical triangulation measuring device includes an emmiter that emits two alternating light beams with different wavelengths along the same path; a beam splitter; an optical separator that directs the alternating split beams towards the surfaces from which they are reflected; an optical combiner that collects the beams and directs them along a path; optronic sensors that receive two light images and to deliver a signal indicating the position of the energy barycenter a time synchronizer for the two alternating beams and the two images on the optronic sensors; and a processor for processing the signals from the optronic sensors in order to supply information relating to the position and inclination of the surface.

Abstract: The invention concerns a laser pointing sighting system comprising a designator range finder (19) including means (E) for emitting a designating laser beam and reception means (R) for detecting and processing the reflection of a hot spot formed by said beam on a target, said reception means (R) are capable in the absence of designating beam emission by the range finder, of detecting the reflection of a hot spot formed on a target by a third designating device, the system comprising means capable, when the reception means detect such a hot spot, of being automatically oriented relative to the direction defined by said spot.