Patent
Duo-frame normalization technique
John E. Nettleton,Dallas N. Barr +1 more
- 17 May 1994
22
TL;DR: In this article, a transmitter emits a modulated energy pulse which is not gated when received by a single gated imaging camera to obtain an integrated first image frame and gated by the same camera when received as an integrated second image frame.
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Abstract: A duo-frame normalization technique and system for use in range gate imag to determine a range coded image by use of two image frames. A transmitter emits a modulated energy pulse which is not gated when received by a single gated imaging camera to obtain an integrated first image frame and gated by the same camera when received as an integrated second image frame. The second integrated frame is divided by the first integrated frame to yield a range coded pixel intensity image. Three gated imagining cameras can also be used that share common imaging optics via filters and beam splitters so as to compensate for phenomenological issues that can vary the signals from one frame to another and lead to degraded range images.
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Citations
Patent
Optical ranging camera
Giora Yahav,Gavriel I Iddan +1 more
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TL;DR: In this paper, an approach for creating an image indicating distances to objects in a scene, comprising of a modulated source of radiation, having a first modulation function, which directs radiation toward a scene; a detector, which detects radiation reflected from the scene, modulated by a second modulation function and generates, responsive to detected modulated radiation, signals responsive to the distance to regions of the scene; and a processor, which receives signals from the detector and forms an image, based on the signals, having an intensity value distribution indicative of the distance of objects from the apparatus.
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TL;DR: In this article, a modulated source of radiation, having a first modulation function, which directs radiation toward a scene such that a portion of the modulated radiation is reflected from the points and reaches the apparatus, is used to create an image indicating distances to points in objects in a scene.
185
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Gavriel J. Iddan,Giora Yahav,Ori J. Braun +2 more
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TL;DR: An optical imaging system comprising: a taking lens system that collects light from a scene being imaged with the optical image system, a 3D camera comprising at least one photosurface that receives light from the camera simultaneously from all points in the scene and provides data for generating a depth map of the scene responsive to the light as mentioned in this paper.
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TL;DR: In this article, a system and method for preventing collisions between a vehicle and objects in a path of the vehicle includes a laser system arranged to direct at least one laser beam outward therefrom and which is in an eye-safe portion of the electromagnetic spectrum, a processor coupled to the receiver and arranged to receive signals derived from the received laser beam and process the signals to determine a distance between the laser system and the objects from which the laser beam has been reflected.
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Method and apparatus for providing adaptive illumination
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TL;DR: In this article, an illumination system for illuminating a scene comprising an illuminator (24, 74, 116) having a plurality of substantially contiguous independently controllable light (26, 76, 76) providing regions each of which provides light that illuminates a different region of the scene, optics (30) that directs light from the illuminators to the scene; a range finder (22, 64, 112) that determines distances to regions of a scene; and a controller (28, 29, 118) that controls the plurality of light providing regions to provide
91
References
Patent
Range imaging sensor
Joseph H. Malek
- 19 Apr 1988
TL;DR: In this paper, a sensor for creating images containing range depth information is disclosed, which comprises a gated energy transmitter used to "illuminate" the object to be imaged, an integrated imaging energy receiver to produce "raw" images, a processor system to combine the raw images from the receiver to output image, and a timing system to control the gate timing of the transmitter and gate timing on the receiver.
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Patent
Imaging lidar system using non-visible light
Bobby Lee Ulich
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TL;DR: In this paper, a laser is used to generate short pulses of infrared light with pulse widths on the order of nanoseconds for remote detection and imaging of objects at night.
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Patent
Charge integration range detector
Jerome Chester Kollodge
- 12 Jul 1990
TL;DR: In this article, a system and a method for obtaining object data with a direct detection technique which employs radiation are disclosed, where a set of radiation pulses are transmitted to an object area.
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Patent
Method and apparatus for providing gain control for an image intensifier tube
II William M. Dallin
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TL;DR: In this article, a photocathode current sensing circuit is provided to adjust the electron accelerating voltage to a cone (32) and a phosphor screen (34) on an image intensifier tube.
10
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