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1809results about How to "Improve positioning accuracy" patented technology
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Indoor positioning method, device and system based on visible light and light source
ActiveCN103383446AGuaranteed determination accuracyImprove stabilityTelevision system detailsBeacon systems using electromagnetic wavesLight sourceVisible spectrum
The invention discloses an indoor positioning method, device and system based on visible light and a light source. The indoor positioning method based on the visible light comprises the steps that the light source is shot, and images which correspond to the visible light and are emitted from the light source are obtained, wherein the visible light is modulated and contains the identity information of the light source; light and dark strips in the images are obtained, wherein the light and dark strips in the images correspond to the identity information of the light source; the light and dark strips are identified to obtain the identity information of the light source; the position corresponding to the identify information of the light source in a map is sought, and the current position is obtained. According to the indoor positioning method, device and system based on the visible light and the light source, the problem that indoor positioning precision is low in the prior art is solved, and the effect of improving the positioning accuracy is achieved.
Owner:北京半导体照明科技促进中心
Moving object behavior tracking method, device, apparatus, and readable storage medium
InactiveCN109117794ASolve the detection speed is slowImprove positioning accuracyCharacter and pattern recognitionCross entropyNon maximum suppression
The embodiment of the invention discloses a moving target behavior tracking method, a device, a device and a computer-readable storage medium. The method includes invoking the pre-constructed object detection model to detect the object in the moving object image so as to locate the position of the moving object in the moving object image. The target detection model is based on YOLOv3 algorithm andtrained with regularization and binary cross entropy as loss function. The target detection model selects the target boundary box satisfying the preset conditions according to the intersection ratioand non-maximum suppression algorithm, and determines the center coordinate of the target boundary box to locate the position of the moving target. The present application utilizes an object detectionimage model to locate a moving object in a captured moving object image, and for a plurality of successive frames of successive images, by locating a moving object in each frame of the images, tracking detection of a moving object behavior in a video is realized. The present application improves the detection speed and positioning accuracy of a moving object.
Owner:GUANGDONG UNIV OF TECH
Vehicle license plate recognition method
InactiveCN105373794ANarrow detection rangeDetection speedCharacter and pattern recognitionCharacter recognitionTemplate matching
The invention provides a vehicle license plate recognition method, and relates to a method for image recognition. The method comprises the following steps of preprocessing an image; partitioning a vehicle region according to color and texture characteristics; extracting a remarkable factor graph of a vehicle region diagram; extracting candidate vehicle license plates by an Adaboost classifier based on expanded Harr-like characteristic; determining the position of a real vehicle license plate from the candidate vehicle license plates; partitioning the marked vehicle license plate from the corresponding vehicle region original diagram; carrying out character segmentation according to structural characteristic; and carrying out character recognition based on the improved template matching method. With the method provided by the invention, the defects that the application scene of the traditional vehicle license plate recognition method is relatively single, some traditional vehicle license plate recognition methods are only suitably used for single vehicle license plate recognition of the single scene and difficultly used for multiple-vehicle license plate recognition of multiple scenes, and the recognition rate is easily affected by strong light, haze and weak light environments are overcome.
Owner:HEBEI UNIV OF TECH
Insertion system for stents, comprising tension-compression kinematics
ActiveUS20090030496A1Improve positioning accuracyHigh positioning accuracyStentsBlood vesselsKinematicsEngineering
The present invention relates to a device for inserting a self-expanding stent into a body vessel. The device comprises a tube, a pushing element and a grip having a housing via which the pushing element is secured on the grip. Further, the device comprises a stent carrier and a moveable element, the latter of which is guided in the housing of the grip and is coupled to the pushing element. Moving the movable element in the proximal direction effects a movement of the pushing element in the distal direction and a movement of the tube in the proximal direction.
Owner:JOTEC
Iris positioning method based on Maximum between-Cluster Variance and gray scale information
InactiveCN101359365AFast positioning timeMeet the requirements of real-time processingCharacter and pattern recognitionCurve fittingKnowledge extraction
The invention adopts the between-class square error and the gray scale information to realize the rapid positioning of the inside and outside boundaries of the iris. Firstly, the interested pupil region is extracted through blocking; the between-class square error is adopted to obtain the pupil binary threshold for the extracted pupil region; then the inside boundary of the iris is positioned accurately through the searching of the boundary points and the curve fitting; the interested region of the iris outside boundary is extracted according to the prior knowledge and the pupil position parameter; the selected region is processed with median filtering and first-order gradient conversion; the iris outside boundary is determined through the local gradient integration method; finally, the iris outside boundary parameter is determined through the circle fitting. The method avoids the image binary from depending on the histogram; the image positioning time is greatly improved because only the interested region is processed; the whole image is not processed; the experiment indicates that the robustness and the positioning efficiency of the algorithm can satisfy the real-time processing requirement of the image.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA ZHONGSHAN INST
Eye location method and device
ActiveCN103093215AHigh precisionImprove speed and accuracyCharacter and pattern recognitionHuman eyeEye position
The invention discloses an eye location method and a device, wherein the eye location method comprises: obtaining information of glasses of a facial image which is to be located,primary locating the eye position of the facial image according to the information of glasses, confirming the opening and closing state of the eyes of the facial image according to the primary located eye position, locating the eye position according to the opening and closing state of the eyes. The eye location method and the device solve the problem that the accuracy of eye location is poor in relative technology, eye location accuracy is improved and speed and accuracy of face identification are further improved.
Owner:BEIJING TECHSHINO TECH
Network optimizing system and method
InactiveCN102149103AOvercome the disadvantages of a single means of problemReflect the operationNetwork planningDatabase serverMobile communication network
The invention discloses a network optimizing system and a network optimizing method. The system comprises a signaling acquisition device, a database server, a data processing module and an optimizing application module, wherein the signaling acquisition device is used for acquiring signaling data from a mobile communication network and storing the acquired signaling data; the database server is used for storing acquired network optimizing analysis auxiliary data and storing the processed signaling data; the data processing module is used for gathering network optimizing analysis basic data and the network optimizing analysis auxiliary data and accomplishing a multilayer database framework for data processing and application; and an optimizing worker calls an analysis result in a multilayer data framework in a data analysis module through the application module so as to realize work in the network optimizing process. By the network optimizing system and the network optimizing method, comprehensive data can be acquired, network problems can be truly and comprehensively reflected, and network performance can be further optimized comprehensively.
Owner:北京维泽瑞科技有限公司
Laser device and lens position adjustment method in the laser device
InactiveUS6928100B2Improve positioning accuracyImprove accuracyOptical resonator shape and constructionMountingsCamera lensCollimator
A recess 14 is provided in a lens accommodating portion 13 of a laser holder 10 for holding a collimator lens C, whereby positional accuracy and adhesion strength of the lens and a light source are improved.
Owner:CANON KK
Power operation and maintenance data cleaning method based on isolation forest algorithm and neural network
ActiveCN108776683AImprove efficiencyImprove accuracyData processing applicationsCharacter and pattern recognitionAnomaly detectionEvaluation system
The invention provides a cleaning method of power communication operation and maintenance data, and more particularly to a power operation and maintenance data cleaning method based on an isolation forest algorithm and a neural network. The method includes: firstly, using the improved isolation forest algorithm to construct an isolation forest model iForest solving a target problem; then definingan evaluation system of the isolation forest algorithm on abnormal data; and carrying out prediction correction on abnormal data attributes, which are detected through an isolation forest, through training the BP neural network. According to the method, optimization is carried out on a power communication operation and maintenance data cleaning method based on the isolation forest algorithm and the neural network, abnormality detection precision is improved, data correction errors are reduced, and effective optimization is realized for a power operation and maintenance data cleaning program onaspects of abnormal-data positioning accuracy, a data correction accuracy rate, training time, resource occupation and the like.
Owner:GUANGDONG POWER GRID CO LTD +1
Information processing apparatus, information processing method, program, and storage medium
ActiveUS20110216958A1Improve positioning accuracyHigh positioning accuracyImage enhancementImage analysisComputer visionInformation processing
Owner:CANON KK
Method for determining travel track of mobile terminal
ActiveCN104596507AHigh positioning accuracyThe location information is accurateNavigation instrumentsComputer terminalControl theory
Owner:成都小步创想畅联科技有限公司
Driver sound localization system and method for automobile
The invention relates to a driver sound localization system and method for an automobile. The system comprises a first sound collecting device, a second sound collecting device and a control system, wherein the first sound collecting device and the second sound collecting device are used for collecting a first sound signal and a second sound signal; the control system is used for respectively processing the first sound signal and the second sound signal so as to output driver locating information; and the control system further comprises a noise reduction device, a filtering device, a sound activation detecting device, a long frame framing device, an envelope calculating device and an energy ratio calculating device and used for calculating the envelope energy ratio of the first and second sound signals according to the calculation results of the envelope calculating device and the long frame framing device. The driver sound localization system and method for the automobile have the advantages of relatively low cost and high locating accuracy and real-time performance.
Owner:HONG KONG PRODUCTIVITY COUNCIL
Iris recognizing preprocessing method based on grey level information
InactiveCN101201893AHigh positioning accuracyImprove versatilityCharacter and pattern recognitionComputer visionGray level
The invention provides a pretreatment method of iris images based on gray information. A rough circle center (xo, yo) of a pupil is located through binary, mathematical morphology, gray projection and other operations, the point, which has a gray value larger than T and the shortest distance to the (xo, yo), is searched at a plurality of lines close to the (xo, yo) from the center to the two sides as a pupil boundary point; the accurate circle center and the radius of the pupil can be located through curve fitting; the gray level first difference of the lines where the searched pixel points lie is calculated and the point with the largest value of the sum of the level first difference is searched in the range of places where iris external boundary point possibly appears and taken as the iris external boundary point; the accurate circle center and radius of the iris external boundary is obtained after curve fitting. The quality of iris image is judged through calculating point sharpness and number of effective pixel points according to the normalized image. The pretreatment method of iris images of the invention not only can decrease the time needed by repeated iteration during location, but also can judge the quality of iris image accurately and quickly according to the extracted iris image.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA ZHONGSHAN INST
TOF and RSSI information fusion-based indoor wireless positioning method
ActiveCN108535687AHigh precisionImprove ranging accuracyParticular environment based servicesPosition fixationTime informationPositioning technology
The invention discloses a TOF and RSSI information fusion-based indoor wireless positioning method which is mainly used for solving a problem that in conventional indoor positioning technology lacks effective error control and is low in data utilization rate. An implementation solution comprises the following steps: step 1, according to communication time information between a target node and an anchor node, a symmetric bidirectional bilateral distance measuring algorithm is used to calculate distance between the two, and a fault threshold and an error threshold are set to filter the distance;step 2, according to RSSI value information between the target node and the anchor node, an MK model is used for converting the RSSI value information into distance between nodes after a Gaussian model is used for screening operation; step 3, the two types of distance is subjected to weighted fusing operation, and final distance is obtained; step 4, estimated solutions for the target node are obtained via circulation maximum likelihood estimation; step 5, the obtained estimated solutions are subjected to residual error weighted fusing operation, and coordinates of the target node are obtained. Via the method, insufficiency of conventional technologies that are large in positioning calculating errors and low in positioning result reliability, and data utilization rates and positioning andtracking precision are improved.
Owner:XIDIAN UNIV
Method and device for locating human eyes
The invention discloses a method and a device for locating human eyes. The method for locating the human eyes comprises the steps of receiving a human face image; locating the nose position and eye positions in the human face image; determining a human face symmetry shaft according to the nose position; adjusting the eye positions according to the human face symmetry shaft, and obtaining target location positions of the human eyes. According to the method and the device, disclosed by the invention, the problem of poorer human eye location accuracy in the prior art is solved, and thus the effect of increasing the eye location accuracy is achieved.
Owner:BEIJING EYECOOL TECH CO LTD +1
Auto logo locating and identifying method
InactiveCN103310231AImprove positioning accuracyImprove recognition accuracyCharacter and pattern recognitionPattern recognitionIntelligent Network
The invention discloses an auto logo locating and identifying method and relates to the field of intelligent transportation. Work environment of the auto logo locating and identifying method is intelligent network cameras. The intelligent network cameras capture pictures and then transmit the pictures into a DSP (digital signal processor) picture processing unit, an auto license plate locating and identifying module processes to acquire exact location of license plates, and then transmits exact location of license plates and picture data to an auto logo locating and identifying module to identify logo type. The auto logo location and identification can be classified into the following types: (1), auto logo location based on multilayer category: utilizing three locating methods to accurately locate auto logos with different texture background, (2) auto logo identification based on multilayer category: utilizing BP neural network classifiers corresponding to different locating types to identify auto logos to finally acquire auto logo types accurately. With the auto logo locating and identifying method, accuracy of auto logo location and identification is greatly improved, timeliness is good, system mounting is more simple and easy to maintain.
Owner:武汉众智数字技术有限公司
Iris locating method based on boundary point search and SUSAN edge detection
InactiveCN101246544ASolving uncharacteristic situationsThe location information is accurateCharacter and pattern recognitionPupilIris image
The invention relates to a iris location method based on border point search and SUSAN edge detection, wherein the method using projection method first, to do and horizontal gray projection for binary iris image filled by spot, obtain rough center of pupil; through vertical scanning gray curve, to find a point which gray value is greater than a threshold value as internal border point of iris; circle fitting a series of the internal border points, thus obtaining location information of inner edge of the iris; Through SUSAN edge detection method, to cause the situation of obvious external border of the iris characteristic solved well, through direction detection, obtaining radius of external border of the iris, and location information of external border of the iris accurately; locating external border of the iris through the SUSAN edge detection method outside edge of the iris position is a feature of the invention, comparing with general two-step iris location method, positioning accuracy rate of the invention is enhanced by 5 percentage, and the speed of the same is enhanced by 40 percent.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA ZHONGSHAN INST
Natural gas pipeline safety monitoring device based on acoustical science active spurring
InactiveCN104373821ARealize online real-time monitoringRealize long-distance distributed monitoringPipeline systemsSound sourcesReflected waves
The invention relates to a natural gas pipeline safety monitoring device based on acoustical science active spurring and belongs to the technical field of pipeline monitoring. The process includes that a sound source is placed at an inlet of the head end of a pipeline to transmit sound waves into the pipeline, and when the sound waves spreading in the axial direction of the pipeline meet hydrates or the pipeline leaks, reflecting signals can be generated; a microphone is arranged near the inlet of the pipeline to collect reflected wave signals; the microphone outputs the reflected wave signals into a signal conditioning module, a multifunctional data acquisition card is used for conducting analog-digital conversion, and finally the signals enter a computer to be analyzed. Positioning of the hydrates and leakage of the pipeline can be conducted by calculating the time difference of the sound wave transmitting signals and the reflected signals, and therefore real-time monitoring on the natural gas pipeline is achieved. The natural gas pipeline safety monitoring device has the main advantages that the method is simple and easy to use, the positioning precision is high, the occupied resources of a system are few, and operation is reliable.
Owner:TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
Optical cable circuit failure point precision locating method
InactiveCN1556384AImprove the efficiency of rushing throughReduce calculationTransmission monitoring/testing/fault-measurement systemsOptical apparatus testingAerial cableTime domain
Using Brillouin reflectance technique in optical time domain adopted in the invention picks up strain information carried by Brillouin frequency drift caused by change of position information and temperature change carried in power of reflected light. Using method of combining absolute positioning with relative positioning makes successive approximation till exact location is determined finally. Comparing with prior art, the invention has features of omitting tedious calculation and additional data log, shortening time for finding out fault point of optical cable line so as to save cost. The method is general suitable method for positioning fault point applicable to optical cable line in position fixing direct burying type, aerial cable or duct optical cable.
Owner:NANJING UNIV
Indoor fingerprint map constructing method based on crowdsourcing fingerprint
ActiveCN106792465AReduce collection workloadIncrease the number of fingerprintsWireless commuication servicesLocation information based serviceWorkloadData mining
The invention discloses an indoor fingerprint map constructing method based on crowdsourcing fingerprint, and belongs to the indoor positioning technology based on the fingerprint. The method is capable of solving the existent problems of constructing the indoor fingerprint map based on the crowdsourcing fingerprint that the positioning accuracy is not high and the calculated amount is larger because the crowdsourcing fingerprint position marking is not accurate, the dimensions are different and the distribution is not uniform, and is used for the technical field of the communication and wireless network. The method comprises a step of grid division, a step of crowdsourcing fingerprint acquisition, a step of crowdsourcing fingerprint resolution, a step of crowdsourcing fingerprint number judgment, a step of AP screening, a step of directly constructing grid fingerprint and a step of fingerprint surface fitting. The method is capable of reducing the workload of the fingerprint acquisition, improving the positioning accuracy, and reducing the workload of the fingerprint comparison.
Owner:HUAZHONG UNIV OF SCI & TECH
Method for producing probe pulse and coherent light time-domain reflector
ActiveCN102142892ADoes not cause spectrum broadeningHigh resolutionElectromagnetic transmissionReflectometers detecting back-scattered light in time-domainContinuous lightTime-domain reflectometer
The invention relates to the field of communication transmission, in particular to a method for producing a probe pulse and a coherent light time-domain reflector. The coherent light time-domain reflector comprises a control unit, a drive unit, a continuous light laser and a detection pulse generating unit, wherein the control unit is used for generating a first pulse signal and a second pulse signal with same period T, the second pulse signal is lag behind the first pulse signal, the period T of the first pulse signal and the second pulse signal is not less than t+2L / C; the drive unit is used for generating a frequency change drive signal according to the first pulse signal; the continuous light laser is used for generating continuous light with unchangeable frequency change spectrum width under the drive of the frequency change drive signal; and the detection pulse generating unit is used for modulating the continuous light according to the second pulse signal to generate a detection pulse. The coherent light time-domain reflector provided by the embodiment of the invention has higher optical fiber failure resolution ratio and positioning accuracy.
Owner:HUAWEI TECH CO LTD
Sound source positioning method and apparatus
ActiveCN107026934APrevent false suppressionImprove positioning accuracyStereophonic circuit arrangementsSpeech analysisSignal-to-noise ratio (imaging)Sound sources
The present invention discloses a sound source positioning method and apparatus, solving the problem of low pickup accuracy in directed pickup of a target voice in the prior art. The method is applied to a terminal with two microphones at the top. The two microphones are respectively arranged at the front and the back of the terminal. The method comprises the steps of when the terminal is in a video call state, and when whether a target user exists in a shooting range of a camera is determined, collecting a sound signal by the two microphones and calculating, based on the collected sound signal, a sound pressure difference of the two microphones; determining, by using the sound pressure difference of the two microphones, whether conditions of determining a sound source direction with the sound pressure difference are met; if the conditions are met, determining, based on the sound pressure difference of the two microphones, whether the sound signal comprises a backward sound signal; and if it is determined that the sound signal comprises the backward sound signal, filtering the backward sound signal in the sound signal. In a low signal-to-noise ratio scenario, sound source positioning based on the sound pressure difference can help improve the pickup accuracy of the target sound source.
Owner:HUAWEI TECH CO LTD
Robot charging method, device and system
ActiveCN104578296AOrderly managementImprove positioning accuracyCircuit monitoring/indicationDifferent batteries chargingCharging stationElectrical and Electronics engineering
The invention discloses a robot charging method, device and system. The method includes the steps that the remaining electric quantity of a robot is detected; pulse signals are sent according to the detected remaining electric quantity of the robot; a charging instruction is sent out according to the received pulse signals; the robot goes to a charging station to be charged according to the obtained charging instruction. According to the scheme, the robot can find out the charging station to be charged in time, and the robot needing to be charged can be managed in an orderly mode; moreover, when positioning signals are used as the pulse signals to be sent, the robot can further be positioned through the pulse signals, and thus the positioning accuracy of the robot is improved.
Owner:深圳中智永浩机器人有限公司
Global position system (GPS) drifting processing method based on ACC signals and device using the same
ActiveCN103163536AShield driftImprove positioning accuracySatellite radio beaconingLongitudeGps positioning
The invention discloses a global position system (GPS) drifting processing method based on ACC signals and a device using the GPS drifting processing method based on the ACC signals. The GPS drifting processing method based on the ACC signals includes the following steps: judging whether a vehicle is in a parking state or a driving state according to the ACC signals inside the vehicle or speed of the vehicle; if the vehicle is judged to be in the parking state, setting longitude, latitude, and mileage value into a constant value, and setting speed into zero; if the vehicle is judged to be in a driving state, setting a first speed threshold value and a second speed threshold value, if the speed is reduced below the first speed threshold value or increased above the second speed threshold value, the vehicle is judged to be in a drifting state, and abandoning current GPS information uploading and mileage accumulation. The invention can effectively shield drifting and improve positioning accuracy of the GPS.
Owner:CHINA TELECOM CORP LTD
Human face feature positioning method based on ASM algorithm
InactiveCN101593272APrecise transformationAccurate Attitude ParametersCharacter and pattern recognitionImaging processingImage resolution
The invention discloses a human face feature positioning method based on an ASM algorithm, belongs to the technical field of image processing, and mainly relates to human face recognition technology in biological feature authentication. The method comprises the following steps: firstly, performing manual calibration on a group of human face sample images to extract feature points; secondly, adopting a Procrustes Analysis algorithm to carry out registration on a sample set to obtain an average human face model; thirdly, adopting a strategy of performing contour search on the images under three resolution ratios to establish a statistic grayscale search model; and finally, performing a matching operation on the statistic grayscale search model and a local grayscale model of a human face image Ys to be positioned, and performing cyclic iterative search positioning on the human face image Ys to be positioned. The human face feature positioning method combines the ASM algorithm and the Procrustes analysis method, can effectively improve human face positioning speed and accuracy, and has strong commonality.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Traffic sign detection and identification method based on collaborative bionic vision in complex city scene
InactiveCN107909059AVerify validityAvoid interferenceImage analysisCharacter and pattern recognitionSaliency mapTraffic sign detection
The invention discloses a traffic sign detection and identification method based on collaborative bionic vision in a complex city scene, which includes the following steps: A, obtaining multiple to-be-detected images in a continuous scene; B, obtaining a cluster collaboration map of the to-be-detected image set; C, obtaining an attention saliency map of each to-be-detected image; D, obtaining a collaboration saliency map corresponding to each to-be-detected image; E, locating a sign ROI (Region of Interest); F, carrying out two-level biologically inspired transformation on the sign ROI by using a forward channel; and H, using a feature transformation map and traffic sign template images pre-stored in a database to carry out Pearson correlation calculation to complete the identification ofthe to-be-detected images. In the method, visual processing of a target by the human brain is simulated, and bottom-up visual processing and top-down visual processing processes are integrated. The collaborative nature of global images is considered, so that image location is accurate, and the robustness of identification is strong.
Owner:CENT SOUTH UNIV
Sound source positioning method, device and electronic apparatus
ActiveCN107144819AImprove experienceImprove positioning accuracyPosition fixationSound sourcesSleep state
The embodiments of the invention disclose a sound source positioning method, a sound source positioning device and an electronic apparatus. The method includes the following steps that: when being in a sleep state, the electronic apparatus continuously receives speech signals; whether an interaction instruction corresponding to each of the received speech signals is a wake-up instruction is judged; if the interaction instruction is not a wake-up instruction, the sound source direction of the speech signal is recorded and is adopted as a first type sound source direction; if the interaction instruction is a wake-up instruction, the electronic apparatus is switched from the sleep state to a work state, and the sound source direction of the speech signal is positioned and recorded, and is adopted as a second type sound source direction; and the sound source direction of a user is positioned according to the first type sound source direction and the second type sound source direction. According to the sound source positioning method, the sound source positioning device and the electronic apparatus provided by the embodiments of the invention, the sound source direction of the user is positioned according to the first type sound direction of the speech signal received under the sleep state and the second type sound source direction of the speech signal received under the work state, and therefore, the accuracy of the sound source positioning of the user is greatly improved, and user experience is better.
Owner:易视星空科技无锡有限公司
IP address geographic position determination method and system
The invention provides an IP address geographic position determination method. The IP geographic position determination method comprises the following steps of acquiring an IP address to be analyzed, searching the IP address to be analyzed through a disclosed IP base to obtain the published geographic position of the IP address to be analyzed, acquiring the last address geographic position corresponding to the IP address to be analyzed through a network detecting tool, and confirming the geographic position of the IP address to be analyzed according to the published geographic position of the IP address to be analyzed and the last address geographic position. The geographic position of the published IP address to be analyzed and the last address geographic position of the IP address to be analyzed are analyzed, the geographic position of the IP address to be analyzed can be determined according to an evaluation value of the candidate geographic position, so that the method has the advantage of improving locating accuracy. Furthermore, user experience on targeted delivery is improved. The invention further discloses an IP address geographic position determination system.
Owner:BEIJING BAIDU NETCOM SCI & TECH CO LTD
License plate positioning method based on deep learning SSD framework
ActiveCN107563372AImprove positioning accuracyHigh speedCharacter and pattern recognitionNeural learning methodsData setFeature extraction
The invention discloses a license plate positioning method based on deep learning SSD framework, comprising the steps of producing license plate data set based on VOC data set format; transferring thelicense plate data set into 1mdb format; adding an assistant network configuration as SSD framework feature extraction layer and classification layer with ResNet residual error network being the basic network; establishing a SSD framework, and conducting training on the network model by means of the established SSD framework; conducting license plate positioning and model assessment by means of the trained model. The invention is advantageous in that license plate positioning is high in accuracy, low in miss rate, and fast in positioning speed; real-time detection of vehicles can be realized.
Owner:JINAN JOVISION TECH CO LTD
Electromagnetic-signal-time-inversion-based fault point positioning method for transmission line
ActiveCN108693444ALow costReduce the impact of noiseFault location by conductor typesFault location by pulse reflection methodsObservation pointEngineering
The invention relates to an electromagnetic-signal-time-inversion-based fault point positioning method for a transmission line. On the basis of an electromagnetic time inversion principle, a single observation point is set at any terminal in a power distribution network and a fault high-frequency transient signal within a limited period of time is measured and recorded; and time inverted sequenceprocessing is carried out on the measured signal, the processed signal is injected into a power distribution network simulation calculation model at an observation point, norm values at different guess positions in the power distribution network are calculated, and a fault position is determined by searching for a maximum peak value and a maximum energy root value. According to the method different form the traditional traveling wave determining method and impedance method, a power distribution network with a complex topological structure can be covered by one observation point without being affected by the fault impedance; and the excellent anti-noise performance is realized. The electromagnetic-signal-time-inversion-based fault point positioning method has the great practical value in fault positioning of the transmission line.
Owner:XI AN JIAOTONG UNIV
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