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1006 results about "Findings methods" patented technology

Iris image-based recognition system

The present invention is to identify an individual from his or her iris captured from an imaging system. Basically the system can be divided into two processes, which are enrollment and verification. Each process consists of four steps. Both processes share the three beginning steps, which are image acquisition, image processing, and feature extraction. Image acquisition is to capture the real iris image of a user. Then image processing is applied to the acquired image. In the next step, the textural information of an iris image is generated into a signature in a process called feature extraction. For an enrollment process, the extracted iris signature will be stored in database for the future use of verification. In a verification process, the last step is to compare the iris signature generated from real time processing with the signatures previously stored. A final decision will be made to determine whether the user is successfully identified or not. The present invention introduces two new methods in the iris recognition algorithm. First, a new method called maximum vote finding method that is used during iris image processing was developed to reduce the time required for localization of inner iris after applying Hough Transform for localization of outer iris. Second, an iris signature based on fractal dimension characterization which is a novel approach used in iris feature extraction process was developed to provide satisfactory matching accuracy of iris images.
Owner:UNIVERSITI TELEKOM

Financial network unusual transaction community finding method based on information entropy

The invention discloses a financial network unusual transaction community finding method based on information entropy. The method includes the specific steps of firstly, analyzing the process and the mode of an unusual transaction, and extracting features of block transactions and suspicious transactions; secondly, storing transaction amounts and traction frequency information of accounts through an adjacent matrix so as to quantize the features; thirdly, defining the information entropy of nodes; fourthly, conducting community division and finding on the financial network nodes according to the financial network unusual transaction community finding method based on the information entropy; fifthly, evaluating the community finding result. Firstly, accuracy of unusual transaction account identification and unusual transaction communication division which are achieved according to the method is calculated, and then the structure of the unusual transaction community is evaluated through the community evaluation index modularity Q. The community finding method based on the information entropy is applied to the anti-money laundering field for the first time, the money laundering accounts can be identified and tracked by finding the unusual transaction community, and unusual transactions can be prevented by analyzing the relations and the transaction laws between money laundering accounts.
Owner:XIAN UNIV OF TECH

Network hot event detection method based on text classification and clustering analysis

The invention discloses a network hot event detection method based on text classification and clustering analysis. The method solves the problem that the efficiency and accuracy rate of the existing network hot event detection method based on clustering analysis need to be improved. The method comprises the steps that feature words are respectively selected for various classes of files through feature extraction and feature selection by utilizing a training corpus; each training text and test text are represented as vectors in all of the feature spaces by utilizing a vector space model method, and the weight of each dimension of the vectors is determined by utilizing a TF-IDF (term frequency-inverse document frequency) method, and then each test text is classified; the classified test texts in different classes are respectively subjected to clustering analysis, so the hot cluster of each class is obtained, the feature word representing the hot event is obtained through further analysis, and then the word property and other aspects of each feature word are analyzed; the description of each hot event is generated by utilizing relevant language knowledge and necessary linguistic organization. With the network hot event detection method based on text classification and clustering analysis, the detection efficiency and accuracy rate of hot events can be effectively improved.
Owner:NANJING UNIV OF POSTS & TELECOMM

Vehicle positioning method and vehicle finding method in parking lot

The invention discloses a vehicle positioning method and a vehicle finding method in a parking lot. The vehicle positioning method comprises the following steps: acquiring the position of the entrance of the parking lot through a GPS of a mobile terminal before a vehicle enters the parking lot; after the vehicle enters the parking lot, acquiring the traveling track of the vehicle through an inertia measurement device of the mobile terminal; when detecting the advancing state changes from a travelling stage to a walking stage, by using the inertia measurement device of the mobile terminal after the vehicle is parked,, at the moment, calculating the parking position according to the position of the entrance of the parking lot and the traveling track through the mobile terminal, and recording the parking position. The vehicle finding method in the parking lot comprises the vehicle positioning method as well as the following steps: when a user finds the vehicle, acquiring the present position of the user through the GPS and/or manual input through the mobile terminal; generating a vehicle finding route from the present position of the user to the parking position through the mobile terminal, and guiding the user to find the parking position according to the vehicle finding route. The vehicle positioning method and the vehicle finding method in the parking lot are low in cost, high in practicability, high in feasibility and easy to popularize.
Owner:SHENZHEN WANGLONG SOFTWARE TECH CO LTD

Passive coherent location radar direction finding system based on Adcock antenna and direction finding method thereof

The invention discloses a passive coherent location radar direction finding system based on an Adcock antenna, mainly solving the problem that angles are precisely measured in an environment with strong direct waves and multi-path interferences. The system mainly comprises a signal branch route signal antenna, a receiver A, a signal processor, a constant false alarm rate (CFAR) and track association module and an angle measurement module. The signal antenna applies the Adcock antenna for receiving moving target echo, direct wave and multi-path. The received signal is filtered and amplified by the receiver A, and is transmitted to the signal processor; an analogue intermediate frequency signal is converted into a digital base-band signal via the signal processor, channel adjustment, clutter canceling and range-Doppler two-dimensional correlation are carried out, and the result is transmitted to the CFAR and track association module; the original track is detected by the CFAR and track association module or a target of a new track is formed by the CFAR and track association module, and the angle of the target is measured by the angle measurement module. The invention can realize precisely measurement of angles in an environment with strong direct waves and multi-path interferences.
Owner:XIDIAN UNIV
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