36 results about "Active stereo" patented technology

A system and method for acquiring three-dimensional (3-D) images of a scene. The system includes a projection device for projecting a locally unique pattern (LUP) onto a scene, and sensors for imaging the scene containing the LUP at two or more viewpoints. A computing device matches corresponding pixels in the images by using the local uniqueness of the pattern to produce a disparity map. A range map can then be generated by triangulating points in the imaged scene.

The invention discloses a method for measuring simulated seabed terrain based on an active stereo vision technology and measuring equipment. By the stereo vision technology, a binocular camera is arranged on the outside of an experimental trough, and seabed terrain changes are measured contactlessly through glass sidewalls of the experimental trough. Partial flow field will not be disturbed, and synchronous acquisition of the whole simulated seabed terrain can be realized. According to the invention, the active vision technology is used in underwater measurement. That is to say, by the utilization of auxiliary structured light irradiating underwater terrain through the glass sidewalls of the experimental trough, dense structured textures or dot arrays are formed on the terrain such that the camera can distinguish more easily. Meanwhile, quantity of terrain characteristic points is also increased. With the combination of the high-resolution camera, high-precision terrain data can be obtained. By the adoption of the method provided by the invention, noncontact, synchronous and high-precision measurement of the simulated seabed terrain can be realized, and corresponding problems existing in the prior art are solved.

Systems and methods are described for capturing, using a forward-facing camera associated with a head-mounted augmented reality (AR) head-mounted display (HMD), images of portions of first and seconddisplay devices in an environment, the first and second display devices displaying first and second portions of content related to an AR presentation, and displaying a third portion of content relatedto the AR presentation on the AR HMD, the third portion determined based upon the images of portions of the first and second display devices captured using the forward-facing camera. Moreover, the first and second display devices may be active stereo display, and the AR HMD may simultaneously function as shutter glasses.

A head-mounted device (HMD) is configured to perform depth detection with a stereo camera pair comprising a first camera and a second camera, both of which are configured to detect/capture visible light and IR light. The fields of view for both of the cameras overlap to form an overlapping field of view. The HMD also includes an IR dot-pattern illuminator that is mounted on the HMD with the cameras and that is configured to emit an IR dot-pattern illumination. The IR dot-pattern illuminator emits a dot-pattern illumination that spans at least a part of the overlapping field of view. The IR dot-pattern illumination adds texture to objects in the environment and enables the HMD to determine depth for those objects, even if they have textureless/smooth surfaces.

A hybrid 3D optical scanning system combining methodologies of active stereo 3D reconstruction and deflectometry to provide accurate 3D surface measurements of an object under inspection. In a preferred embodiment, the present system comprises a calibrated digital camera stereo pair and first digital projector for active stereo 3D reconstruction metrology positioned at selected distance apart on the same horizontal plane facing the inspection object at an optimal incidence angle relative to the object surface. A secondary digital projector for deflectometry is directed to project a pattern sequence across the optical projection path of the first digital projector and onto a nonplanar deflection screen extended between the digital camera and the inspection object at a selected angle relative thereto, the selected angle being chosen so that that the pattern projected onto the deflection screen by the secondary digital projector reflects from the surface of the inspection object towards the digital camera. Calibrated active stereo 3D reconstruction is used to derive global shape and the uncalibrated nonplanar deflected light acquires curvature of local fine deformations and surface imperfections along the object surface. The calibrated camera allows per pixel correlations to be defined between the separate acquisition methods and produces accurate absolute measurements of both shape and local features of specular, glossy, metallic curved surfaces.

An improved vehicle surface scanning system for assessing the damaged surfaces of a vehicle with resulting estimates of repair costs. A mobile scanning booth is assembled in an open-ended tunnel-like rig having a plurality of reflective panels positioned along opposite sides and across the roof of the booth to serve as deflection screens. A plurality of scanner modules are mounted in fixed positions about opposite ends of the booth and positioned to face the interior of the booth. Wheels provide controlled locomotion/movement of the scanning booth over the vehicle. The scanner modules use a combined hybrid methodology of active stereo 3D reconstruction and deflectometry to acquire data measurements along the surfaces of the vehicle incrementally as the booth is moved. The incremental measurement data acquired during the mobile scanning is processed and furthermore combined to produce accurate reports of the damage surfaces and estimates of associated repair costs.

The portable sound boxes include a pair of active stereo sound box with power source built in. Side faces of two pieces of sound box are in crescent shape. There is a radian shape in front face and back face. Belled mouth for speaker is setup at upward inclined plane. Being connected through a jointing strip, two sound boxes can be fixed at upper of left and right chest. Thus, shoulders can hang two sound boxes without need of hands to carry it. The portable sound boxes are convenient to use, providing perfect stereo speacker sound field.

An ophthalmological analysis system, comprising: an air-puff generating device configured to apply an air-puff to a user's at least one eye; and at least one sensors board configured to detect and record deformation of a cornea of the user during the air-puff; wherein the detection is a three dimensional (3D) active stereo detection; the sensors board further configured to find two applanation points and hysteresis of the cornea and to calculate intraocular pressure in the user's at least one eye accordingly.

A method and apparatus for generating a three-dimensional depth map, are provided. The method comprising the steps of: (i) illuminating a target by a pattern projector having background intensity or by a combination of a pattern projector which does not have a background intensity operative together with a flood projector; (ii) capturing at least one image that comprises one or more objects present at the illuminated target; (iii) converting the at least one captured image into data; (iv) processing the data received from the conversion of the at least one captured image while filtering out the projected pattern from the processed data; (v) detecting edges of at least one of the one or more objects present at the illuminated target; and (vi) generating a three-dimensional depth map that comprises the at least one of the one or more objects whose edges have been determined.

The invention relates to a digital city three dimensional (3D) active stereo display system and a manufacture method thereof. The digital city 3D active stereo display system comprises a computer host, a projector, a pair of stereo glasses and an infrared data emitter. The computer host is used for converting three-dimensional coordinates of three-dimensional data to stereo parameters of an eye range and a visual range, and the stereo parameters are used for recording of a 3d video. The projector supports a 3D function. The pair of the stereo glasses can receive an infrared signal. The computer host is connected with the projector and the infrared data emitter. The infrared data emitter is connected with the pair of the stereo glasses. According to the digital city 3D active stereo display system and the manufacture method thereof, real-time stereo displaying on three dimensional data of a main stream three dimensional platform can be achieved, the three dimensional data in the three dimensional platform can be recorded to a stereo video, a stereo vide image can be watched, a visual and lifelike experience is achieved, and optimized decisions can be made through utilization of geographic information in an urban plan.

The invention discloses a configuration method for split application and integrated application of an electronic control module and an electro-optical control module of active stereo glasses. The active stereo glasses are composed of a control module, an LCD (liquid crystal display) driving module, an LCD module, a power supply management module and a wireless receiving module, and the control module, the LCD driving module and the power supply management module are in split configuration with the glasses; the wireless receiving module and the LCD module are in integrated configuration with the glasses; the modules are connected according to the following manner that: the power supply management module is in forward connection with the control module, the LCD driving module and the wireless receiving module respectively, the wireless receiving module is in forward connection with the control module, the control module is in forward connection with the LCD driving module, and the LCD driving module is in forward connection with the LCD module; and the control module, the LCD driving module and the power supply management module, which are in split configuration, are in wired plug-in connections with the glasses. The active stereo glasses produced through the method provided by the invention are configured in a split manner, so that the active stereo glasses can meet the requirements on convenience in use and storage, flexibility in configuration and convenience in function expansion, and has wide developmental prospect and market demand.

The invention discloses a construction method of an air refueling and refueling simulation training visual system based on the virtual image display and an active stereo technology, and belongs to the field of flight simulator visual simulation. The method comprises a multi-channel visual synchronous three-dimensional rendering module, an active three-dimensional projection display module and a binocular head position motion capturing module. The multi-channel visual synchronous three-dimensional rendering module comprises a multi-channel visual rendering device and a synchronization device; the active stereoscopic projection display module comprises an active stereoscopic projector, a synchronous signal transmitter and virtual image display equipment; the binocular head position motion capturing module comprises an optical marking stereo glasses helmet and a binocular motion capturing camera. According to the method, the synchronization performance of the equipment and the tracking performance of the head movement and posture of the pilot are enhanced, and the requirement of simultaneously presenting the depth feeling and the out-of-screen feeling of an air refueling visual environment is met; moreover, the system has the advantages of low cost, high visual image synchronization precision, high pilot head posture tracking precision and the like of air refueling and refueling simulation training virtual image display equipment.

The present invention relates to the stereo-isomers of gamma-lactam (clausenamide) substituted by hydroxyl benzyl group, hydroxyl group and phenyl group, light active stereo-isomers thereof, process for producing same, pharmaceutical composition adopting same as active substances, and therein applications for preparing intelligence promoting and anti-aging pharmaceutical agents.