Process for detection of obstacles present, in particular, in front of an automotive vehicle
First Claim
1. A process for detecting the presence of obstacles, said process comprising the steps of:
- providing, by means of a video camera, a video signal representative of a video image of a scene;
measuring the distances of the obstacles in the scene relative to the video camera by means of a ranging apparatus, pulsed waves of which scan the scene by successive horizontal range lines; and
synchronizing the pulsed waves and the scan of the pulsed waves by synchronization signals of the field and the line extracted from the video signal.
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Abstract
The present invention concerns a process and an apparatus for the detection of obstacles. The apparatus includes a video camera (2) for the viewing of the scene, a range apparatus (3) to measure the distance d of obstacles, the range apparatus (3) being coupled to an assembly (6, 7) for the deflection of the pulsed radiation emitted by the telemetric apparatus (3), and signal conditioner (16) designed to produce, from the synchronization signals of the field (ST) and the line (SL) of a video signal of the camera (2), signals making it possible to cause, in the same uneven field, the emission of pulsed radiation and the horizontal scanning movement of a mirror. The conditioner (16) further makes possible the synchronous recording, on a standard video tape recorder, conventional video signals and digitally coded range signals.
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Citations
23 Claims
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1. A process for detecting the presence of obstacles, said process comprising the steps of:
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providing, by means of a video camera, a video signal representative of a video image of a scene; measuring the distances of the obstacles in the scene relative to the video camera by means of a ranging apparatus, pulsed waves of which scan the scene by successive horizontal range lines; and synchronizing the pulsed waves and the scan of the pulsed waves by synchronization signals of the field and the line extracted from the video signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An apparatus for the detection of obstacles, said apparatus comprising:
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a video camera for viewing a scene; a range apparatus to measure the distance of obstacles in the scene relative to the video camera; an assembly for the deflection of a pulsed radiation emitted by the range apparatus, the assembly including at least one mobile deflecting mirror causing the pulsed radiation to effect a horizontal scanning movement of the successive range lines of the scene; and a signal conditioner designed to produce, from synchronization signals of an uneven field and a line of a video signal of the video camera, signals making it possible to cause, in the same uneven field, the emission of pulsed radiation and the horizontal scanning movement of the mirror, and signals capable of inscribing during the following even field, onto successive video lines of the video image, range data relative to the coordinates of impact points of the pulsed radiation on obstacles in the scene and relative to the measured distance of each point of impact relative to the video camera. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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Specification