254 results about "Spatial mapping" patented technology

A system and method for acquiring spatial mapping information of surface data points defining a region unable to receive effective GPS signals, such as the interior of a building, includes an IMU for dynamically determining geographical positions relative to at least one fixed reference point, a LIDAR or camera for determining range of the IMU to each surface data point, and a processor to determine position data for each surface data point relative to the at least one reference point. A digital camera obtains characteristic image data, including color data, of the surface data points, and the processor correlates the position data and image data for the surface data points to create an image of the region.

The wireless communication devices A and B determine the optimal diversity combining weight information that optimizes a diversity reception state at each antenna group A₁, A₂, . . . , A_P through two-way training signal transfer between the wireless communication devices A and B. This optimal diversity combining weight information is set to each antenna of each antenna group A₁, A₂, . . . , A_P. Wireless communication units A′, B′ perform spacial mapping of signals from antenna group A₁, A₂, . . . , A_P using MIMO technology. Communication area can be enlarged by hierarchization MIMO using the optimal diversity combining weight information.

In a cellular network, symbols are encoded and modulated to produce a modulated signal The modulated signal is mapped to a subcarrier using a spatial mapping matrix. An inverse fast Fourier transform is applied to the mapped signal to produce groups of tones. The groups of tones are transmitting concurrently to multiple receivers using the same channel as orthogonal frequency-division multiplexing access (OFDMA) signals. There is one group of tones for each receiver.

A substrate for use in providing an ionized target comprising a structured substrate has a plurality of recesses, at least a portion of the plurality of recesses containing an initiator, the substrate being capable of having a target loaded on it. In one methods, irradiation of the substrate can cause the initiator to restructure, releasing it from the recesses and thereby desorbing and ionizing the target. The target so desorbed and ionized can be detected by mass analyzers. The mass of the targets at a given point on the surface can be recorded to provide a spatial mapping of the targets on the surface.

A wireless transmitter includes a stream parser for generating a plurality of spatial streams from a digital signal and a space time block coder (STBC) for mapping each of the spatial streams to a plurality of space-time streams that each include data and a preamble for estimating a channel transfer function. The transmitter also includes a spatial mapper for spatially expanding each of the space-time streams by applying a spatial expansion matrix to data and to first training symbols used in the preamble to probe a channel experienced by the data and by applying an extension matrix to second training symbols used in the preamble to probe at least one additional dimension of the channel to enable use of beamforming to achieve range extension The spatial expansion matrix and the extension matrix form an overall matrix that has at least two orthogonal columns with different norms. The wireless transmitter also includes an analog front end for modulating the spatially expanded space-time streams onto a wireless carrier.

Methods, devices and systems of an optical sensor for spatially smart 3-D object measurements using variable focal length lenses to target both specular and diffuse objects by matching transverse dimensions of the sampling optical beam to the transverse size of the flat target for given axial target distance for instantaneous spatial mapping of flat target, zone. The sensor allows volumetric data compressed remote sensing of object transverse dimensions including cross-sectional size, motion transverse displacement, inter-objects transverse gap distance, 3-D animation data acquisition, laser-based 3-D machining, and 3-D inspection and testing. An embodiment provides a 2-D optical display using 2-D laser scanning and 3-D beamforming optics engaged with sensor optics to measure distance of display screen from the laser source and scanning optics by adjusting its focus to produce the smallest focused beam spot on the display screen. With known screen distance, the angular scan range for the scan mirrors can be computed to generate the number of scanned spots in the 2-D display.

The present invention is directed to an apparatus and a method to improve color matching between original color images and reproductions of those images. The present invention is implemented by a look-up table that maps colors from a first color space to a second color space for a color image reproduction system comprising an input device and an output device is achieved by identifying a region of the second color space in which the accuracy of the transformation is to be improved, obtaining a medium conveying a selected color within the region of second color space, scanning the medium with the input device to obtain first values representing the selected color in the first color space, applying the transformation to map the first values to second values in the second color space and determining a transformation error for the map, and modifying one or more entries in the look-up table to effect a change in the transformation so as to reduce the transformation error.

A method is provided for transmitting a digital signal. The method includes generating a plurality of spatial streams from a digital signal and transforming the spatial streams into a plurality of space-time streams. Each of the space-time streams are cycled in the frequency domain among each of a plurality of transmit antennas. The space-time streams are wirelessly transmitted from the plurality of transmit antennas.

Spatial mapping of wireless access point service area. A means is presented by which a WACN's (Wireless Access Control Node's) service area is spatially mapped providing information corresponding to coverage region(s) within the WACN's service area. This spatial mapping may be generated and stored within either communication device at either end of a communication link (e.g., in a WACN or in a communication device operable to connect to the WACN). From the WACN's perspective, the spatial map can include its one or more coverage regions within its service area. From a communication device's perspective (e.g., a communication device that is capable to connect to a WACN), the spatial map can include multiple service areas provided by multiple WACNs and the various coverage regions therein. The partitioning of a WACN's service area into coverage areas can be performed along various lines (e.g., signal strength, history of connectivity, operational parameters employed, etc.).

The invention relates to a stereoscopic intelligent image pick-up device based on omni-directional vision sensors, comprising a fixing bracket, a high-speed globular video camera arranged on the fixing bracket, as well as a video data microprocessor used for controlling the high-speed globular video camera to shoot pictures. The stereoscopic intelligent image pick-up device also comprises an omni-directional vision sensor ODVS used for acquiring omni-directional video data in a monitoring area; the microprocessor carries out dynamic image understanding and other processing to acquired panoramic video images, so as to get the spatial position information of an object or an event concerned in the monitoring area; according to the view field space mapping relationship between the ODVS and the high-speed globular video camera, the high-speed globular video camera is instructed to rotate rapidly to a desired fixed-point position for local monitoring. The invention provides the stereoscopic intelligent image pick-up device which realizes multi-objective automatic tracking, automatically shoots monitoring objects in omni-directional wide field of view, realizes real-time dynamic intelligent process monitoring, and is based on the omni-directional vision sensor.

The invention discloses a Spark platform supported spatial data management-based diagram calculation system and method. The method comprises the following steps of: dividing a spatial range of spatial data into a plurality of rectangle areas according to geographic position information through receiving the spatial data, distributing data in each rectangle to different subareas, dividing the subareas into grids, sorting the grids, carrying spatial mapping on the data, and establishing a quadtree index; receiving query request of a diagram, converting the query request into data query, and carrying out search in an index of a data storage layer in a range of the requested diagram; if a plurality of diagram data exists, carrying out spatial connection on multiple diagrams according to the returned query result, and distributing edges, in a set range, of distances in the query result into a same subarea on the basis of a diagram subarea strategy of positions so as to realize the construction of a local diagram. According to the system and method, direct spatial range query and spatial connection operation on the diagram are realized through extending the diagram query, and the requirements of numerous scenes are satisfied.

The present invention is directed to an apparatus and a method to improve color matching between original color images and reproductions of those images. The present invention comprises an input device and an output device by obtaining a first transformation that maps points representing colors within a first output-device-gamut from a device-dependent color space to points in a device-independent color space, obtaining a second transformation that maps points representing colors within a second output-device-gamut from the device-dependent color space to points in the device-independent color space, and deriving the color space transformation such that it maps a respective point from the device-dependent color space to a corresponding point in the device-independent color space according to whether the respective point is within either or both of the first and second output-device gamuts.

The invention discloses a network abnormal flow monitoring system based on a density peak value cluster, comprising a characteristic selection module, a subspace mapping module, an abnormal weight assignment module, an abnormal weight value integration module, an abnormal weight value threshold determination module, and an abnormal flow detection module. The characteristic selection module chooses a new characteristic space module through a key character source IP address collected in a unit time of one minute; the subspace mapping module maps a high dimension characteristic space to a plurality of low dimension spaces to form a plurality of new characteristic space data; the abnormal weight assignment module calculates the abnormal weight of each data point in each subspace on the basis of distance weight assignment method of the density and the distance; the abnormal weight value integration module calculates the abnormal weight values in the subspace to perform integration to obtain the ultimate abnormal weight of the original space data point; the abnormal weight threshold determination module takes the gradient abrupt change position as a detection threshold after sorting the ultimate abnormal weights according to the reverse order; and the network flow, the abnormal weight of which is greater than the threshold, is abnormal flow, and otherwise, the network flow is the normal flow. The network abnormity flow monitoring system based on the density peak value cluster is applicable to various network environments and can improve the accuracy of the detection precision.

A spatial mapping matrix searching apparatus may include a plurality of antennae configured to receive a plurality of transmission signals, a post-coding module configured to generate a post-coding information according to the received plurality of transmission signals and generate a received signal from the received plurality of transmission signals, and a pre-coding module configured to generate a pre-coding information according to the post-coding information.

Systems and methods are provided for measuring electrical activity within a brain of a patient. An electrode array is configured to take measurements of electrical potential as raw electroencephalographic (EEG) data. A data processing component includes a spectral decomposition component configured to divide the raw EEG data into a plurality of frequency intervals, within a total range of frequencies and an inverse solution component configured to transform the raw EEG data associated with each frequency interval into a spatial mapping of electrical activity as to provide a set of parameters, with each parameter representing an average electrical activity at an associated location within the brain over an epoch of interest.