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518results about How to "Accurate extraction" patented technology

Entity relationship recognition method and apparatus

The present invention relates to an entity relationship recognition method and apparatus. The method comprises obtaining a statement sequence from a target text in a corpus, and performing named entity recognition and dependency grammar marker on the statement sequence to obtain a marked text sentence; matching and retrieving the marked text sentence on basis of an entity relationship seed to obtain a training example; replacing the entity relationship seed word in the training example with predetermined identification, processing the training example after replacement combined with the named entity recognition and the dependency grammar marker, and generating a candidate rule; fuzzifying the candidate rule to obtain fuzzy rules; determining whether the fuzzy rules comprise a new rule; and retrieving the corpus according to the fuzzy rules to obtain a seed set when the fuzzy rules comprise the new rule, and using the obtained seed set as an entity relationship recognition result. Manual participation can be effectively reduced, dependence on the calibrated corpus is reduced, a new entity relationship can be found timely, and the entity relationship recognition method and apparatus are self-adaptive to entity relationship mining in different fields.
Owner:LETV HLDG BEIJING CO LTD +1

Method for counting pedestrian flow from multiple views under complex scene of traffic junction

The invention relates to method for counting the pedestrian flow, in particular to a method for counting the pedestrian flow from multiple views under the complex scene of a traffic junction, comprising the following steps: carrying out background modeling to videos by adopting the hybrid code book algorithm, and detecting and segmenting the moving targets; calculating the movement vector by adopting the optical flow method to obtain the speed and the direction of the moving targets, distinguishing vehicles and pedestrians according to the speed and the direction of the moving targets, eliminating the vehicle targets, extracting the pedestrian targets, and calculating the direction of the pedestrians; setting a virtual door, and counting the pedestrian targets which enter and exit the virtual door according to the direction of the pedestrians and the predetermined direction of the pedestrians entering and exiting the virtual door. The method is suitable for counting the pedestrian flow from multiple views under the complex scene of the traffic junction by detecting the moving targets, extracting the pedestrians and counting the numbers of the pedestrians entering and exiting the virtual door in real time by adopting the virtual gate technology, has the counting accuracy of 90% and can adapt to the complex situation that the illumination of the outdoor environment is changeable, the shooting is carried out under changeable inclined angles, the human body resolution is low and the vehicles and the pedestrians run together.
Owner:ZHENGZHOU JINHUI COMP SYST ENG

Foreground segmentation method applied to mobile communication network transmission

The invention provides a foreground segmentation method applied to mobile communication network transmission and belongs to the field of image processing and communication network transmission. Five background templates with the shooting time intervals to be consistent with image acquisition intervals in the case of operation are pre-stored, and the former four background templates are used for fine detection in the case when a target is detected coarsely. The difference region area between the monitored image and the background image is calculated to judge whether a target enters, the image does not need to be transmitted when the target does not exist, the target region is segmented when the target exists, and the target region is only transmitted. The received target region is fused in the pre-stored background image by a server for video playing or image presentation. In a shooting mode, in order to prevent a passerby from being judged to be an obstacle, the target is set to be transmitted to the server only when the target is extracted by a third party according to the scene length, the human walking speed and the monitoring shooting frequency. Background replacement can be timely carried out after each time of segmentation cycle acquisition is finished, and interference caused by light and other environmental changes can be overcome in a slow transition way.
Owner:CHONGQING UNIV

Hyperspectral abnormal object detection method based on structure sparse representation and internal cluster filtering

The invention discloses a hyperspectral abnormal object detection method based on structure sparse representation and internal cluster filtering, aiming at addressing the technical problem of low object detection effciency of current hyperspectral abnormal object detection methods. The technical solution involves: after selecting an initial background pixel, using the dictionary learning method which is based on principal component analysis to study a background dictionary which obtains rebustness, in the course of sparse vector resolution and image reconstruction, introducing re-weighted laplacian prior to increase the solution precision of sparse vector, computing the errors betwen an original image and a reconstructed image to obtain a sparse representation error, using the internal cluster filtering to represent space spectrum characteristics of hyperspectral data, obtaining the internal cluster error by computing the error between a to-be-tested pixel and other pixel linear representation result, and finally combining the sparse representation error and the linear weighting of the internal cluster error and implementing precise extraction of an abnormal object. According to the invention, the method increases 10-15% of detection rate with the proviso of a constant false alarm rate compared with prior art.
Owner:NORTHWESTERN POLYTECHNICAL UNIV

Online monitoring device, detection circuit and testing method for junction temperature of electronic power switch

The invention relates to an online monitoring device, a detection circuit and a testing method for a junction temperature of an electronic power switch. The online monitoring device comprises a master control unit, a to-be-tested power electronic device, a current detection unit, a Vce(on) detection unit and an AD collection unit, wherein the master control unit comprises a device driving unit and a junction temperature calculation unit power electronic switch device, the current detection unit is used for collecting a current Ic flowing through the device in a conducting state; the Vce(on) detection unit is used for collecting a conducting pressure drop Vce of an IGBT in a certain rated time period in a conducting state and obtaining an equivalent conducting pressure drop signal Vce(on) by virtue of an analogue circuit in the Vce(on) detection unit; the AD collection unit is used for finishing the conversion from simulation current and voltage to digital signals; the device driving unit is used for providing a gate electrode driving signal Vg of a to-be-tested device and a switch signal Vp(mos) of the Vce(on) detection unit; and an IGBT driving unit is used for regulating a level fluctuation sequential relationship between a gate electrode switch control signal Vg of an IGBT module and the switch signal Vp(mos) of the Vce(on) detection unit in the IGBT driving unit.
Owner:CHAJNA MAJNING DRAJVS EHND AUTOMEHJSHN KO

Method and system for wireless channel measurement based on wavelet decomposition threshold de-nosing

The invention discloses a method and a system for wireless channel measurement based on wavelet decomposition threshold de-nosing. The method includes the following steps: (1) using a spread spectrum sliding correlation method to finish wireless channel measurement so as to obtain channel impulse response containing noise, (2) conducting multi-resolution wavelet decomposition for the channel impulse response and leading the channel impulse response to be converted from time domain to wavelet domain, (3) reasonably selecting a threshold function and a threshold and processing wavelet coefficients corresponding to the noise according to the threshold function; (4) conducting wavelet reconstruction and leading the de-noised channel impulse response to be converted from the wavelet domain back to the time domain, and (5) storing the de-noised channel impulse response for researching channel characteristics. Through steps of wavelet decomposition, threshold de-nosing, wavelet reconstruction and the like, the method and the system can reduce interference on the channel impulse response caused by the noise, improve accuracy and effectiveness of channel measurement results, and provide reliable data basis for follow-up researching of channel characteristics.
Owner:BEIJING UNIV OF POSTS & TELECOMM

Method for extracting face characteristic based on local three-value mode

The invention relates to a method for extracting a face characteristic based on a local three-value mode, belonging to the technical field of image processing. The method comprises the following steps of: firstly carrying out down sampling on an original face image to construct a face image pyramid, then calculating LTP (long-term potentiation) characteristics of all the pixel points in an image at each layer, and then dividing the LTP characteristics of all the pixel points into positive LTP sub characteristics and negative LTP sub characteristics, respectively carrying out statistics to obtain a positive LTP sub characteristic value histogram and a negative LTP sub characteristic value histogram of the image at each layer in the face image pyramid, and finally connecting vectors H+ and H- corresponding to the positive LTP sub characteristic value histogram and the negative LTP sub characteristic value histogram as the final characteristic of the original face image I (x, y). In the invention, the local characteristic of the LTP characteristic and the statistics characteristics of all the local LTP characteristic histograms are utilized to realize uniformity of the local characteristic and global characteristic, and the LTP characteristic has a better inhibition effect on noise compared with the LBP (local binary pattern) characteristic which is frequently adopted. The extracted characteristic has the characteristics of constant rotation and constant grey scale, and face characteristic can be accurately extracted under the influences that illumination condition is changed, face expression is changed and a gesture is changed.
Owner:厚普清洁能源(集团)股份有限公司

Method for backfilling number in signaling monitoring and number backfill server

The invention discloses a method for backfilling a number in signaling monitoring and a number backfill server. The method comprises the steps of: A, establishing a correspondence among an IMSI (International Mobile Subscriber Identification Number, a TMSI (Temporary Mobile Subscriber Identification and an MSISDN (Mobile Station International ISDN (Integrated Services Digital Network) Number) with an MSC (Mobile Switch Unit) as a unit by using a logic relationship among numbers in a plurality of signaling messages transmitted by interfaces at the periphery of the MSC, generation time of the signaling messages and all signaling messages, and recording updating time of the correspondence; and B, backfilling the number of the IMSI or MSISDN for the received signaling messages according to the correspondence and the updating time thereof, and storing the signaling messages after being subjected to number backfilling. According to the method and the number backfill server disclosed by the invention, the IMSI or MSISDN can be backfilled into the signaling messages to ensure that a signaling monitoring system can completely and accurately extract the signaling messages of a subscriber/a subscriber group through an actual number, i.e. the IMSI or MSISDN of a mobile subscriber.
Owner:CHINA MOBILE GROUP SICHUAN +1

Clastic rock reservoir modeling method and device based on a digital geological outcrop

The invention relates to a clastic rock reservoir modeling method and device based on a digital geological outcrop. The clastic rock reservoir modeling method comprises the steps that the geological outcrop is selected according to known data of a target exploratory area; geological information of the geological outcrop is collected, and geological outcrop data bodies are obtained; the pictures of the outcrop in all the directions and at all the positions are obtained; actual measurement is conducted on the geological section of the geological outcrop, and a rock sample of the geological outcrop is obtained; analysis, assaying and measurement are conducted on the rock sample, and a rock physical property analysis graph is obtained; the geological outcrop data bodies are spliced, and the three-dimension data body, with uniform coordinates, of the geological outcrop is obtained; through the pictures of the geological outcrop in all the directions and at all the positions, the geological phenomena of the three-dimension data body of the geological outcrop are described; a three-dimension geological model of the geological outcrop is established according to the described geological phenomena of the geological outcrop and the actual measurement information of the geological section; according to the rock physical property analysis graph, a clastic rock reservoir physical property model is established through the three-dimensional geological model of the geological outcrop.
Owner:BC P INC CHINA NAT PETROLEUM CORP +1

Apparatus and program for separating a desired sound from a mixed input sound

A sound separation apparatus for separating a target signal from a mixed input signal, wherein the mixed input signal includes the target signal and one or more sound signals emitted from different sound sources. The sound separation apparatus according comprises a frequency analyzer for performing a frequency analysis on the mixed input signal and calculating spectrum and frequency component candidate points at each time. The apparatus further comprises feature extraction means for extracting feature parameters which are estimated to correspond with the target signal, comprising a local layer for analyzing local feature parameters using the spectrum and the frequency component candidate points and one or more global layers for analyzing global feature parameters using the feature parameters extracted by the local layer. The apparatus further comprises a signal regenerator for regenerating a waveform of the target signal using the feature parameters extracted by the feature extraction means.
Since both of local feature parameters and global feature parameters can be processed together in the feature extraction means, the separation accuracy of the target signal is improved without depending on the accuracy for extracting feature parameters from the input signal. Feature parameters to be extracted include frequencies and amplitudes and their variation rates for the frequency component candidate points, harmonic structure, pitch consistency, intonation, on-set/off-set information and/or sound source direction. The number of the layers provided in the feature extraction means may be changed according to the types of the feature parameters to be extracted.
Owner:HONDA MOTOR CO LTD

Decentralized image copyright protection system and method with infringement real-time detection

ActiveCN110110500AMeet the needs of copyright protectionGuaranteed to be authenticUser identity/authority verificationProgram/content distribution protectionTransmission protocolData set
The invention relates to the technical field of copyright image protection, and provides a decentralized image copyright protection system and method with infringement real-time detection, and the method comprises the following steps of (1), enabling a registered user to upload an image through a client, and enabling an SIFT image feature extraction algorithm in the system to carry out the featuredata collection on the uploaded image; (2) extracting the invariant characteristics, such as visual angle, translation, affine, brightness, rotation, etc., of an existing copyright image by a user through an SIFT algorithm to form a local feature vector set of the image, and taking the local feature vector set as a registered image feature data set; (3) carrying out distributed storage on the feature data sets in the steps (1) and (2) by utilizing an IPFS (Internet Protocol File System), and constructing a network transmission protocol for persistent and distributed storage and file sharing;and (4) performing comparative analysis and calculation, and judging that the image does not accord with the condition of forming a new work. The system and the method provided by the invention have the characteristics of being tamper-proofing, realizing the high safety, permanent preservation and decentralization, being able to trace, being low in cost, etc.
Owner:施建锋
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