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305results about How to "Solve precise positioning" patented technology

Method and apparatus for the surveillance of objects in images

Object detection and tracking operations on images that may be performed independently are presented. A detection module receives images, extracts edges in horizontal and vertical directions, and generates an edge map where object-regions are ranked by their immediacy. Filters remove attached edges and ensure regions have proper proportions / size. The regions are tested using a geometric constraint to ensure proper shape, and are fit with best-fit rectangles, which are merged or deleted depending on their relationships. Remaining rectangles are objects. A tracking module receives images in which objects are detected and uses Euclidean distance / edge density criterion to match objects. If objects are matched, clustering determines whether the object is new; if not, a sum-of-squared-difference in intensity test locates matching objects. If this succeeds, clustering is performed and rectangles are applied to regions and merged or deleted depending on their relationships and are considered objects; if not the regions are rejected.
Owner:HRL LAB

Optical scanning apparatus and image forming apparatus

An optical scanning apparatus includes an optical source, a deflection part deflecting an optical beam emitted from the optical source, plural optical elements directing or focusing the optical beam deflected by the deflection part to corresponding one of plural image carrying bodies, a holding member holding the plural optical elements, wherein the optical beam scans the respective image carrying bodies in a main scanning direction, and wherein the holding member includes a pair of holding member elements disposed so as to face each other in the main scanning direction, and the plural optical elements are held between the pair of holding member elements in a bridged state.
Owner:RICOH KK

Audio-video frequency media data organization realizing method of supporting precision positioning

The method includes (1) traversing entire stream file of AVS program, building indexing information for all I frames, adding the indexing information to the end of the stream file of AVS program, and loading the indexing information before playing back AVS program stream; (2) based on operations such as fast locating, scene jumping, and quick dragging operations carried out by user to determine position and time of playing point; (3) using same proportion search method to find out PS packet containing I frame nearest to the playing point so as to find out initial position and timestamp of PS packet in AVS program stream file; (4) based on time and position of I frame of playing point, system locates relevant position of the AVS program stream automatically and carries out playing back operation. Advantages are: solving pinpoint issue, and guaranteeing standard AVS program stream.
Owner:联合信源数字音视频技术(北京)有限公司

High-precision electric field driven spray deposition 3D printer and working method thereof

The invention discloses a high-precision electric field driven spray deposition 3D printer and a working method thereof, and solves the problems of a traditional 3D printer on multiple aspects of resolution, stability and controllability; high-precision printing of multilayer structures can be realized; the printing process is observed and monitored in real time; and high-precision pattern printing is performed on insulation substrates through electric conducting materials. The high-precision electric field driven spray deposition 3D printer comprises a mounting baseplate; a Y-axle worktable is arranged on the mounting baseplate; a vacuum absorption platform is fixed on the Y-axle worktable; a printing substrate is absorbed on the vacuum absorption platform; a printing nozzle and a vertical observation camera are correspondingly arranged above the printing substrate, and are connected to a Z-axle worktable; the Z-axle worktable is fixed on an X-axle worktable; a squint observation camera is correspondingly arranged on one side of the printing nozzle; an LED light source and a far infrared curing light source are correspondingly arranged on the other side of the printing nozzle; theprinting nozzle communicates with a storage bottle; and the storage bottle is arranged on a lifting table.
Owner:QINGDAO TECHNOLOGICAL UNIVERSITY

City complex traffic environment path guide system and method based on locating labels

The invention provides a city complex traffic environment path guide system and method based on locating labels. The method comprises the steps: (101) locating labels of two-dimension codes or classification codes and the like are arranged on the peripheries and vital lines of complex road junctions, interchanges, comprehensive transportation junctions and commercial building clusters; (102) the locating labels of the two-dimension codes or the classification codes and the like are linked to the physical positions of the locating labels arranged in realistic scenes; (103) the locating labels in the realistic scenes are scanned through a handheld or vehicle-mounted terminal, so that locating or path planning based on locating is achieved. The step (101) further comprises the step (101-1) for generating the locating labels; the step (101-2) for constructing a traffic network topology of a city complex environment by the adoption of a three-dimensional model capable of distinguishing nodes; and the step (101-3) of distributing different weighted values to different road sections, then obtaining an optimal edge dominating set based on the obtained network topology and the road section weighted values, and arranging the locating labels for the optimal edge dominating set.
Owner:CHINA AEROSPACE SYST ENG

Method and system for performing accurate positioning by adopting hybrid sampling filter by intelligent vehicle

The invention discloses a method and system for performing accurate positioning by adopting hybrid sampling filter by an intelligent vehicle. The accurate positioning of a vehicle in an environment without / with a weak satellite signal can be realized by utilizing the hybrid sampling filter and combining pre-constructed high-precision map data or real-time point cloud data collected by a laser radar or a camera, the method and system can be used for aided driving and unmanned driving of the vehicle; a new probability positioning framework is adopted, and a random sampling consistency algorithmand a particle filter / histogram filter algorithm are efficiently integrated by using a nuclear density estimation method, the disadvantages of the opposite parties are remedied by sufficiently utilizing the respective advantages, and then more robust, accurate and quick positioning is performed by using a probability grid map based on a Gaussian hybrid model.
Owner:北京奥特贝睿科技有限公司

Process and device for the automatic rectification of single-channel or multi-channel images

A process and a device for the automatic rectification of images, where at least one image is rectified by a mapping function onto a reference image and at least some of the parameters of the mapping function are unknown are disclosed. The process includes at least an extraction of at least three objects from the image; a detennination of at least three control points in the image, where characteristic points of the extracted objects are determined as control points; an assignment of the objects to objects in the reference image, where the objects in the two images are assigned on the basis of the similarity between the objects and / or on the basis of a vector grid, the vector grid being formed by connecting the characteristic object points, and a selection of a suitable mapping function and / or an adjustment of the parameters of the mapping function, where the mapping function is changed by changing the parameters in such a way that the cumulative error with respect to the positional differences between the projected control points and the corresponding points in the reference image is minimized.
Owner:DEUTSCHES ZENTRUM FUER LUFT & RAUMFAHRT EV

Amplitude phase calibrating device for semi-closed loop coupled phased array channels

The invention provides an amplitude phase calibrating device for semi-closed loop coupled phased array channels. Each channel of an active phased array plane is coupled to one waveguide coupler, thereby forming a coupling loop. Two ends of the coupling loop are connected with a signal receiving and transmitting module and a load. When a channel of the active phased array plane transmits an amplitude phase, a transmission system of the active phased array plane transmits a signal, and the signal receiving and transmitting module of the coupling loop receives the signal. When the channel of the active phased array plane receives the amplitude phase, the signal receiving and transmitting module of the coupling loop transmits a signal, and a system of the active phased array plane receives the signal. The transmitted or received amplitude phase information is fed back to a beam control dispatcher of an array phased array radar for amplitude phase calibration. The device not only can be used for the amplitude phase calibration of a phased array before assembly, also can be used for channel detection and amplitude phase calibration after assembly, enables the waveform design of the phased array to be more accurate, and enables the performance of the array phased array radar to be better.
Owner:NO 20 RES INST OF CHINA ELECTRONICS TECH GRP

Cursor moving control method and system

The invention relates to a cursor control method which comprises the following steps: setting a selection control mode of a first cursor moving way or a second cursor moving way in advance according to user's preference; tracking a moving point path, and initiating a cursor control processes according to the predetermined action; based on the predetermined action, determining whether a reference point is set or not, if yes, building a user coordinate system for cursor controlling through selecting a reference point and taking the selected reference point as a center; calculating the relative position between a current point and the reference point; and under the mode of the first cursor moving mode, performing cursor positioning for a cursor moving speed manner through maping the relative position, and under the mode of the secod cursor moving mode, performing cursor position adjustment on cursor offset distance through maping the relative position of the current moving point relative to the reference point.
Owner:RICOH KK

Method for decision of time delay by repeater in mobile communication network

A method for determination of a repeater time delay in a mobile communication network, without affecting a correct positioning of a mobile terminal, is disclosed. The method includes the steps of determining an initial estimated position of a mobile communication terminal to be measured its position, estimating a respective distance between a serving base station and an adjacent base station and the mobile terminal using the initial estimated position, estimating a time difference of arrival of a serving base station signal and an adjacent base station signal received by the mobile terminal using the estimated distances, receiving the time difference of arrival of the serving base station signal and the adjacent base station signal measured from the mobile terminal, calculating a difference between the estimated time difference of arrival and the measured time difference of arrival, and determining the difference as a repeater time delay existing in the serving base station of the mobile terminal, if said difference is larger than a predetermined threshold value. The present invention makes it possible to estimate in advance the clock error in the terminal owing to the repeater time delay in AGPS system, so it can provide the terminal with more precise Acquisition Assistance Information (AAI). Further, such estimation of clock errors in the mobile terminal makes it possible to prevent the failure in acquisition of GPS signals that may occur due to the significant deflection error in the clock operation of the mobile terminal.
Owner:SAMSUNG ELECTRONICS CO LTD
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