2112 results about "Observation point" patented technology

In the three-dimensional display, a two-dimensional display section generates a two-dimensional display image based on an image signal, and a lens array converts the wavefront of the display image light from the two-dimensional display section into a wavefront having a curvature which allows the display image light to focus upon a focal point where an optical path length from an observation point to the focal point is equal to an optical path length from the observation point to a virtual object point, so a viewer can obtain information about an appropriate focal length in addition to information about binocular parallax and a convergence angle. Therefore, consistency between the information about binocular parallax and a convergence angle and the information about an appropriate focal length can be ensured, and a desired stereoscopic image can be perceived without physiological discomfort.

A method for visualizing temporal phenomena and constructing 3D views from a series of medical images includes providing a first time series of digital images of contrast-enhanced blood flow in a patient, each acquired from a same viewing point with a known epipolar geometry, each said image comprising a plurality of intensities associated with an N-dimensional grid of points, calculating one or more time-density curves from said first time series of digital images, each curve indicative of how the intensity at corresponding points in successive images changes over time, and generating one or more overview images from said time density curves using a color coding technique, wherein said each overview image depict how a physical property value changes from said blood flow at selected corresponding points in said first time series of images.

A network monitoring device configured to collect a new packet from one or more observation points of a network and to compare the new packet with a list of a number of received packets based on a packet arrival rate and to identify a duplicate packet. In particular, the number of received packets in the list is equivalent to a number of packets received within a time period, i.e. the packet arrival rate. Stated differently, the network monitoring device is to compare the new packets with received packets stored in a queue of a buffer and wherein the queue has a size based on a packet arrival rate collected at one or more observation points. In addition, the time period is further adjusted according to a threshold value. The threshold value is a variable parameter that can be adjusted to compensate for different network deployment. In one embodiment, the threshold value is a time value that is not more than a transmission time of a TCP retransmitted packet.

A method for geographical surveying includes the steps of determining an observation grid comprising observation points above a solution volume in the ground; making gravitational measurements at the observation points over a survey area; compiling a matrix having elements relating a set of gravitational accelerations and gravity gradient values at the points to the mass values for volume elements in the solution volume; and calculating the three-dimensional density distribution of the volume under the survey area based on the gravitational measurements and the inverse of the matrix. By measuring the magnetic field and gradient at the observation points, the three-dimensional magnetic susceptibility distribution of the volume under the survey area can be determined.

A method, apparatus and computer program product are provided to provide the rendering of audiovisual content, such as 360-degree virtual reality content, in a manner that allows for control over whether, and to what degree, the content presented to a viewer should take into account the relative positioning of the content with respect to the viewer. In particular, implementations are presented that allow for situational control over the rendering of content based on an initial observation setup associated with a segment or subsegment of content, the orientation of the viewing device, and/or the manner in which the segment or subsegment is accessed by a playback device.

A scan-based BIST architecture for detecting path-delay faults in a sequential circuit converted to a combinational circuit or a less complex sequential circuit including a combinational portion and a plurality of scan flip-flops. The BIST structure includes a test pattern generator for generating two test patterns and a controller for generating a clock signal and an extended scan mode signal which is held high for two clock cycles while the output response of the combinational portion to the first and second test vectors is latched into the scan flip-flops in order to detect a signal transition. The invention is further directed to a method for detection of path-delay faults using this scan-based BIST architecture. To improve the fault coverage for path-delay faults, observation points may be inserted at the inputs of selected scan flip-flops. A predetermined number of scan flip-flops having the highest activation frequency are selected as the observation points.

A head-mounted image display device with a good operability and a data processing apparatus including such a display device. A head-mounted image display device wherein a liquid crystal panel and an enlarging optical system are crystal display panel through the enlarging optical system housed in a frame and wherein images generated on the liquid are visible in the field of view in front of the frame comprises a first direction detection means (107) disposed in part of the frame (101) for detecting the direction of the user's head; an observation point detection means (109) disposed in part of the frame for detecting the user's line of sight; a trigger input means (4) for transmitting trigger signals; and an image generation means (3, 105) for controlling images generated on the liquid crystal display panel based on signals from the first direction detection, observation point detection, and trigger input means.

By applying an observing-point conversion and s synthesis to images captured by respective cameras capturing the surroundings of a vehicle and by placing a figure representing the vehicle on the synthesized image, an overhead-image generating unit generates an image to be obtained when captured at an observing point above the vehicle, a figure representing the vehicle, and an overhead image showing the surroundings of the vehicle in an overhead viewing manner, and displays the overhead image on a display device via a display processing unit. When an obstacle is detected by obstacle sensors, the caution-image generating unit extracts an image of those stored in an image memory, in an area including a part of the vehicle and the obstacle, generate a caution image, and displays the caution image at a position on the overhead image via the display processing unit corresponding to the position of the obstacle.

The invention discloses a method for measuring positioning points based on a laser tracker in a docking process of airplane parts. The method provided by the invention comprises the following steps of 1, establishing a model of transformation between an airplane global coordinate system and a laser tracker measure coordinate system according to common observation points, 2, acquiring current calculating positions of positioning measure points of airplane parts according to a process joint sphere centre position, and 3, controlling and driving a laser tracker to search current accurate positions of the positioning measure points of the airplane parts from the current calculating positions according to a cross helical search method and to carry out automatic measure. The method provided by the invention has the advantages that 1, an advanced laser measure technology is adopted so that the airplane assembling measure precision is improved; and 2, a measure process does not need artificial light introduction and full automatic search measure of a docking assembling process is realized according to an algorithm so that working efficiency and measure precision are greatly improved and working strength of workers is reduced.

The invention relates to a vehicle GPS data map matching method based on a hidden markov model. The method comprises the following steps: acquiring route data from a shpefile electronic map; extracting original vehicle trajectory data, and preprocessing vehicle GPS data; taking a road section with a certain distance of each GPS observation point as a candidate road section; calculating the observation probability of each GPS point and transition probability of an adjacent candidate road section on the basis of the hidden markov model; and calculating an optimal matching trajectory by using a viterbi algorithm. The vehicle GPS data map matching method is based on the hidden markov model, by consideration of the positions of the GPS points, speed and direction, topology of a road network and the associated information between trajectory points and the road network, new observation probability and new transition probability are raised, and therefore, map matching accuracy is improved further.

The invention discloses an examiner identification system based on bionic and biometric identification, using synthetically various biometric identification methods based on high-dimension space geometric shape adaptive coverage theory to achieve identification of examiner identity. First of all, through an acquisition equipment, gripping-pen fingerprint is obtained, on-line signature and facial image, and then the data is mapped into high-dimension space observation point after feature extraction, last according to similar sample point continuity in the high-dimension space, through the relation between the observation point and sample set coverage area to obtain different biological characteristic network match degree, then through match degree fusion decision algorithm to identify identity of the examiner, and through automatic addition of new verification data to achieve sample set dynamic updating and trend forecast. Identification of the invention is fast, result is accurate, and the invention is not only suitable for examiner identification in existing examination mode, but also has broader application in the future machine- examination mode.

A time reversal process for determining a fault location in an electrical power network comprising multi-conductor lines, comprises measuring at an observation point located anywhere along one of the multi-conductor lines, for each of the conductors of the multi-conductor line, respectively a fault-originated electromagnetic transient signal; defining a set of guessed fault locations each having a different determined location in the electrical power network, and each of the guessed fault locations is attributed a same arbitrary fault impedance; defining a network model for the electrical power network, based on its topology and multi-conductor lines electrical parameters capable of reproducing in the network model the electromagnetic traveling waves; and computing for each conductor a time inversion of the measured fault-originated electromagnetic transients signal. The time reversal process method further comprises, as detailed herein, back-injecting a computed time inversion; calculating fault current signal energy; and identifying the fault location.

An offset measuring method according to the present invention accurately measures a transmitting time offset of a base station. The offset measuring method for receiving signals from the radio base station and measuring the transmitting time offset of the radio base station includes the steps of calculating estimated values of transmitting time offset based on signals received at a plurality of observation points and selecting a minimum from the estimated offsets to determine the selected minimum value as transmitting time offset of the radio base station.

Game system in which an object is arranged in a virtual three-dimensional space including a display device, an input device for outputting signals according to player operations and a game control device for executing a game according to a program while checking the output of the input device and displaying a visual field image including the object on the display device. The visual field image is viewed from a predetermined view point position in the virtual three-dimensional space. The game control device includes a position determining device for determining whether to view the object from a first view point position which is a back and slightly inclined position toward a moving direction of the object to view an observation position set forward the object, or from a second view point position from which the observation point is viewed in a fixed direction regardless of the movement of the object.

The invention belongs to navigation methods and particularly relates to a method for combined navigation of an inertia/visual odometer/laser radar. The method comprises (1) state model establishment, (2) visual odometer speed measurement based on characteristic information, (3) establishment of a measurement equation and obtaining of a measurement value, (4) Kalman filtering and (5) system error correction. The method has the advantages that a machine vision autonomous navigation technology is used, a monocular camera can measure a vector speed under the conditions of a known distance through the difference of a front frame image and a rear frame image, the laser radar can accurately measure the distance of an observation point and then measure a vector speed, navigation is performed by utilizing combination of the speed obtained through measurement and an inertial reference speed, and high-accuracy navigation is performed finally under the conditions of no outside reference information.

The invention provides a diopter self-adaptive head-mounted display device including a display facing people's eyes, an optical lens between the display and the people's eyes, and an eyeball tracking module, the display shows a frame by facing the people's eyes, the distance from the display to the center of the optical lens is object distance u, the optical lens is used for focusing the frame of the display to be an image to be clearly seen by the people's eyes, the virtual image of the image and the people's eyes are arranged at the two sides of the display, the distance from the virtual image to the center of the optical lens is image distance v, the optical lens is provided with a focal distance f, the eyeball tracking module is used for detecting the sight direction of the two eyes to position the observation point position of a user, the relative position of the display and the optical lens is adjusted based on the position of the observation point, the display and the optical lens can perform relative movement separately or together along the direction of an optical axis, the distance from the center of the optical lens to the display is adjusted based on the observation point position acquired by the eyeball tracking module to make the adjusted object distance u satisfy the condition of 1/f=1/u-1/v.

One embodiment of the present invention provides a system that automatically generates an input sequence for a circuit design using mutant-based verification. During operation, the system receives a description of the circuit design. Next, the system determines a target value for a control signal in the description and a mutant value for the control signal. The system then determines if an input sequence exists for the circuit design that stimulates the control signal to the target value and causes the effects of the target value and the effects of the mutant value to reach an observation point in the circuit such that the effects of the target value and the effects of the mutant value differ at the observation point. If such an input sequence exists, the system then simulates operation of the circuit design using the input sequence. During simulation, the system generates two sets of signal outputs for the circuit design. The first set of signal outputs is affected by the target value for the control signal, while the second set of signal outputs is affected by the mutant value for the control signal.

The present invention discloses a method for controlling an elevator system. In the method, hints relating to potential elevator passengers are received from at least one observation point connected to the elevator system. Based on the hints, forecasts relating to potential elevator passengers are prepared, on the basis of which forecasts one or more anticipatory control actions are executed.

The invention provides a display method of processing images photographed by plural cameras and an apparatus for the same, which synthesizes the images by plural cameras mounted on a vehicle for photographing the surroundings thereof and makes it possible to display an easily viewable three-dimensional object near the vehicle, as if one camera were positioned above the vehicle. An image capture unit captures images photographed by plural cameras that photograph the surroundings of a vehicle. An upper observation point image processing unit synthesizes the captured images into an image viewed as from above the vehicle. An image intensity/chrominance determination unit detects an area wherein the displayed image varies from other areas in the synthesized image based on the intensity/chrominance thereof. When the intensity or the chrominance of the area is continuously varying, a three-dimensional object detection unit determines the detected area as a three-dimensional object. A three-dimensional object display processing is performed regarding the detected three-dimensional object image, using either an ordinary image display or a two-observation point image display. This three-dimensional object display image is associated with an upper observation point image at a base front end of the three-dimensional object by an image connecting synthesizing unit, and the associated image is displayed.