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8130258 |
Method for processing a video sequence and apparatus implementing said method
The present invention is in the field of Content protection, most particularly in cinema venues where camcorder acquisition followed by immediate illegal distribution creates important revenue...
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7236201 |
Method of generating an image in a turbid medium
A method is provided for the generation an image in a turbid medium. After illuminating locations along a each of three adjacent lines using beam(s) of light, a camera is activated to generate...
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7233346 |
Differential imaging method and system
A differential imaging system is particularly efficacious for detecting objects in high dispersion or light-scattering mediums, such as seawater. Such a device especially useful in mine detection....
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6963354 |
High resolution imaging lidar for detecting submerged objects
An image lidar includes a laser for generating light beam pulses in a line scan to illuminate an area surrounding a target. A controller selects pulse width and pulse rate of the light beam pulses...
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6633338 |
Programmable illuminator for vision system
The field portion (40) of a workpiece (14) that an electro-optical system (28) can image is deflected by a field-of-view deflector (38) and an array of light sources (42, 44) illuminates the...
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6462768 |
Image enhancement
An image of a scene partially obscured by atmospheric backscattered light is enhanced by taking account of variations in the mean backscattered flux component resulting from variations in the...
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6348942 |
Enhanced underwater visibility
A system for enhancing underwater visibility is described that uses left and right alternately chopped laser illumination, filtered wide baseline stereo imaging and specular reflectors for...
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6331887 |
Outdoor range finder
The present invention is a distance measuring device having a low power laser for use outdoors. The distance measuring device of the invention includes a laser emitting means that emits a pulsed...
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6072565 |
Night vision device with improved laser range finder
An integrated night vision device and laser range finder (10) provides night-time imaging of a scene by use of an image intensifier tube (14), as well as providing laser range finding operations....
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6028624 |
Method and apparatus for increased visibility through fog and other aerosols
A system is described that uses chopped laser illumination, chopped and fered wide baseline stereo imaging, specular reflectors along the path to navigated, comparison of the two stereo images...
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5880771 |
Electro-optical detection system
An electro-optical detection system for detecting objects embedded in a partially transmitting medium. The system includes a receiver for receiving electromagnetic radiation and a device for...
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H001783 |
High spatial resolution, range gated, underwater imaging method and apparatus
A method and apparatus for imaging objects in turbid mediums, such as water, the invention using a laser pulse, a detector of the reflected laser pulse, and a shutter on the detector. The shutter...
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5694203 |
Distance camera device having light gate for extracting distance information
A range imaging device such as a distance camera is improved by incorporating an oscillator to generate a reference signal, a light source to emit a light modulated in accordance with the reference...
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5682229 |
Laser range camera
A laser range camera provides both imaging and range information using laser radar techniques. A laser transmitter having a fan shaped beam that creates a column shaped beam in a far field is...
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5526038 |
Method and apparatus for taking distance images
A method for producing distance images according to the principle of emitting a light signal and the time-delayed reception of the reflected light signal by a receiving device wherein at least two...
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5506616 |
Differential imaging for sensitive pattern recognition
A frequency agile laser illuminates a scene with floods of emissions of different wavelengths. As the wavelengths, or laser color changes, certain objects will stand out with respect to their...
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5467122 |
Underwater imaging in real time, using substantially direct depth-to-display-height lidar streak mapping
An imaging system for detecting the contents of a turbid medium, such as water or air, which is at least partially transmissive of light. The system includes a light source for producing a series...
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5450125 |
Spectrally dispersive imaging lidar system
An imaging UV/visible fluorosensing and Raman lidar system comprises an optical sensor for simultaneously measuring temporally, spatially and spectrally resolved laser backscatter from on the land,...
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5434612 |
Duo-frame normalization technique
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...
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5353054 |
Hands free lidar imaging system for divers
The present invention utilizes laser imaging, detection and ranging (LIDAR) as an optical source for an imaging system for helmeted divers who work in highly light backscattering fluid mediums. A...
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5343284 |
Imaging lidar system employing bistatic operation
An imaging lidar system is presented which is adapted to decrease the backscattering at the receiver when a target is viewed in reflection and to increase the backscattered reflection when the...
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5335070 |
Laser light beam homogenizer and imaging lidar system incorporating same
A new and improved laser light beam homogenizer for transforming a laser beam with spatially inhomogeneous intensity into a beam with a more nearly spatially uniform intensity pattern is presented....
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5303051 |
Method for removing the effects of particulate matter from sequence images
Imaging devices often obtain images of a scene in which portions of the scene are obscured by particles that are interposed between the scene and the camera such as those images obtained when...
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5249046 |
Method and apparatus for three dimensional range resolving imaging
A three dimensional range resolving imaging sensor is presented. The sensor comprises a transmitter for generating a light pulse which passes through beam homogenizer and a pair of Fresnel-Risley...
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5233415 |
Imaging lidar employing transmitter referencing
An imaging lidar system is presented which utilizes internal or external transmitter beam pattern referencing for improved imaging lidar performance. In general, the present invention samples the...
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5231401 |
Imaging lidar system
An airborne imaging lidar (light detection and ranging) sensor is provided which employs multiple pulsed laser transmitters, multiple gated and intensified array camera receivers, an optical...
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5231400 |
Covert electronic battlefield identification system
An electronic identification system for use by vehicles on a battlefield comprises an interrogator circuit in an attack vehicle and a transponder circuit in several other vehicles which are...
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5231480 |
Airborne imaging lidar system employing towed receiver or transmitter
An imaging lidar apparatus for detecting and imaging an object enveloped by a backscattering medium which is at least partially transmitting to light is presented. The imaging lidar apparatus is...
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5200793 |
Range finding array camera
An electro-optical camera system is presented. In accordance with the present invention, a light source (e.g. laser) is modulated by an electro-optic modulator (such as a Pockels cell) and...
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5200792 |
Device for obtaining distance information from an object by instantaneously illuminating the object by a light beam
For obtaining distance information between an image pickup device (10) and an object (11) illuminated by a monochromatic beam selected by a diffraction grating (18) from an optical beam generated...
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5164823 |
Imaging lidar system employing multipulse single and multiple gating for single and stacked frames
An imaging lidar system is presented which employs a multipulse multiple gating system which is particularly well suited for underwater imaging. The imaging lidar system of this invention utilizes...
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5140463 |
Method and apparatus for improving the signal to noise ratio of an image formed of an object hidden in or behind a semi-opaque random media
The quality of image of an object hidden inside a highly scattering semi-opaque disordered medium is improved by using space gate imaging or time gate imaging or space time gate imaging. In space...
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5091778 |
Imaging lidar systems and K-meters employing tunable and fixed frequency laser transmitters
The present invention uses tunable and fixed frequency lasers as an optical light source in imaging laser detection and ranging (LIDAR) systems. This invention provides a high energy, short pulse...
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5056914 |
Charge integration range detector
A system and a method for obtaining object data with a direct detection technique which employs radiation are disclosed. A set of radiation pulses are transmitted to an object area. A mechanical...
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5034810 |
Two wavelength in-situ imaging of solitary internal waves
A two wavelength lidar imaging system for underwater applications is presented which employs image subtraction. More specifically, a two wavelength lidar system is presented wherein two...
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5029009 |
Imaging camera with adaptive range gating
Variable time delay range gating across an image is accomplished using a single imaging camera. In a preferred embodiment, the imaging camera of the present invention accomplishes adapted range...
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5013917 |
Imaging lidar system using non-visible light
A system is presented for the remote detection and imaging of objects at night. In accordance with the present invention, a laser is used to generate short pulses of infrared light with pulse...
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4967270 |
Lidar system incorporating multiple cameras for obtaining a plurality of subimages
An improved imaging light detection and ranging (lidar) system is presented which provides variable time delay range gating across a selected image. Variable time delay range gating across an image...
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4964721 |
Imaging lidar system
A novel timing control method is utilized in conjunction with an imaging lidar system of the type disclosed in U.S. Pat. No. 4,862,257. This novel timing control is employed in applications wherein...
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4920412 |
Atmospheric obscurant penetrating target observation system with range gating
The system includes a television camera or an optical viewer device with a gated image intensifier input. A short intense laser pulse is transmitted to illuminate the scene. The image intensifier...
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4915498 |
Range imaging sensor
A sensor for creating images containing range depth information is disclosed. The sensor comprises a gated energy transmitter used to "illuminate" the object to be imaged, a gated integrating...
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4888644 |
Television camera system having differentiated illumination between fields
A system includes a television camera (10), a first source of illumination (17) operable to provide pulsed illumination of a scene to be viewed by the camera, and a second source of illumination...
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4688086 |
Method of imaging a target illuminated through an optically distorting region
A target is illuminated through an optically distorting region, such as atmospheric turbulence or non-precision optics, by coherent light and a first set of data is recorded indicative of the...
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4451847 |
Automatic strobe/camera control unit
An automatic strobe/camera control unit for sensing when the TV/strobe po is on and the camera is enabled, and for automatically triggering the TV/strobe and camera at a preset time interval. An...
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4226529 |
Viewing systems
The invention relates to a pulsed laser viewing system adapted to view range intervals in a scene by gating the detector signal; according to the invention, the viewing system also includes a...
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4195311 |
Coherence length gated optical imaging system
An apparatus for providing an image of an object, a diffusive medium being ocated between the apparatus and the object, the apparatus including a coherent light source for projecting a beam of...
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4193088 |
Optical heterodyne system for imaging in a dynamic diffusive medium
A system for providing an image of an object from a coherent light signal transmitted from the object through a dynamic diffusive medium is provided with a planar surface receiving the signal...
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4174524 |
Ultra high speed gated pulse optical imaging system
Apparatus for overcoming the effects of back scatter and forward scatter in iewing an object through a diffusive medium includes a projector for projecting successive picosecond coherent light...
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4143400 |
Real-time optical mapping system
An optical system, to be used with an illuminating source, maps objects lted in an underwater environment. A first optical means is adapted to receive light from the illuminating source for...
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3947119 |
Active sensor automatic range sweep technique
A plurality of range increments are sequentially pulse-illuminated and energy reflected therefrom is received by a gated light amplifier. Timing circuitry sequentially varies the range viewed, by...
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