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901results about How to "reduce complexity" patented technology

Video fingerprint detecting and video sequence matching method and system based on visual features

The invention provides a video fingerprint detecting method based on visual features. The method comprises the specific steps of segmenting a video sequence according to frame-to-frame correlation, extracting key frames from segments, extracting video features from all key frames, utilizing a pixel point feature dictionary to classify pixel points, respectively blocking all key frames multiple times in different numbers, counting the occurrence times of all elements of the pixel point feature dictionary according to pixel point classifying results in all sub blocks to obtain feature vectors of the sub blocks, splicing the feature vectors of all sub blocks to obtain high-dimensional video fingerprint of the key frames, reducing dimensions of the high-dimensional video fingerprint of the key frame, and connecting the low-dimensional video fingerprints of the key frames of all video segments into a key frame video fingerprint strand according to a time sequence. The invention further provides a video matching method based on the fingerprint detecting method. The video fingerprint detecting method and the video matching method can effectively describe key information of video contents, greatly reduce algorithm complexity under the situation without affecting the matching ratio and effectively improve the detecting efficiency.
Owner:HUAZHONG UNIV OF SCI & TECH

Silicon resonation type pressure sensor based on synovial membrane differential structure and manufacturing method thereof

InactiveCN101614604AEasy structure and layout designreduce complexity
The invention discloses a silicon resonation type pressure sensor based on a synovial membrane differential structure and a manufacturing method thereof, belonging to the technical field of sensors. The silicon resonation type pressure sensor mainly comprises a resonator 2, a strut 1, a pressure sensing membrane 3 and a frame 4, wherein the upper part of the frame 4 is connected with four sides of the pressure sensing membrane 3, and the lower part is provided with a cavity at the place corresponding to the pressure sensing membrane 3 so that tested air gets into contact with the pressure sensing membrane 3 after passing through the cavity. The strut 1 is arranged on the upper surface of the pressure sensing membrane 3, while the resonator 2 is suspended on the upper surface of the pressure sensing membrane 3 through the strut 1and the frame 4. The silicon resonation type pressure sensor simplifies the manufacturing process and the layout and reduces the influence of air leakage during packaging to the performance of the sensor; and the adopted differential structure can restrain the common-mode noise and increase the sensitivity, thereby improving the noise-signal ratio of an output signal and lowering the detection difficulty of external circuits.
Owner:NORTHWESTERN POLYTECHNICAL UNIV

Method, device and base station for distributing sounding reference signal (SRS) resource in long term evolution (LTE) system

ActiveCN103036663Areduce complexitysave search time
The invention discloses a method, a device and a base station for distributing sounding reference signal (SRS) resource in a long term evolution (LTE) system. Before distributing SRS for user equipment (UE), uplink sounding reference signal information (SRS) is divided into a plurality of SRS secondary resources in advance, and a plurality of SRS secondary resource collections are formed, wherein the SRS secondary resources in the identical SRS secondary resource collections are provided with identical resource allocation. The method of distributing SRS resource includes the following steps of ascertaining the SRS secondary collections which are used for distributing the SRS resources for the UE according to access requirement information transmitted by the UE, and distributing the SRS secondary resources capable of being distributed in the ascertained SRS secondary collections to the UE. According to the method, the device and the base station for distributing (SRS) resource in the LTE system, complexity of distribution of the SRS resource can be reduced, search time capable of being used for the distribution of the resource can be shortened, and therefore time of the base station to distribute the SRS resource to the user equipment (UE) can be saved and distribution efficiency is improved.
Owner:WUHAN HONGXIN TELECOMM TECH CO LTD

Image retrieval method and device

ActiveCN106886599AEnhanced description abilityreduce complexity
The invention discloses an image retrieval method and an image retrieval device and relates to the field of image search. The method comprises the steps of extracting global characteristics of a picture and then carrying out dimension reduction; quantifying the characteristics into binary bit strings; and retrieving similar pictures from a database according to a distance of the binary bit strings. According to the image retrieval method and the image retrieval device, the description for the picture is accurate by use of the global characteristics, the data size of picture characteristics can be decreased through dimension reduction for the global characteristics, meanwhile as a dimension reduction model can allow the distance of the global characteristics, subjected to dimension reduction, of a picture to be decreased and the distance of the global characteristics subjected to dimension reduction of dissimilar pictures increases, the descriptive power is improved after the global characteristics of the picture are subjected to dimension reduction; furthermore, the picture characteristics are quantified into the the binary bit strings, the data complexity can be reduced, the data storage volume is decreased, the matching complexity during retrieval is reduced, the retrieval efficiency is improved, and the image retrieval processing power is enhanced to hundreds of millions of magnitude orders.
Owner:BEIJING JINGDONG SHANGKE INFORMATION TECH CO LTD +1

Intelligent glasses with blinking detection function and implementation method thereof

The invention discloses a pair of intelligent glasses with the blinking detection function and an implementation method of the intelligent glasses. The intelligent glasses comprise a glasses frame, a glasses bridge, eyeglasses, nose supports and glasses legs, wherein the nose supports and the glasses legs are respectively provided with a myoelectricity sensor; the glasses bridge is provided with a vibration reminder, and each glasses leg is provided with a myoelectricity signal processing device and a camera. The implementation method includes the following steps that 1, an eye change myoelectricity signal is collected through the myoelectricity sensors; 2, the collected myoelectricity signal is sent to a signal processing circuit for processing, and myoelectricity signal features are obtained; 3, the obtained myoelectricity signal features are compared with preset myoelectricity signal features, one-time blinking is judged if the obtained myoelectricity signal features are coincident with the preset myoelectricity signal features, and next judgment is carried if the obtained myoelectricity signal features are not coincident with the preset myoelectricity signal features; 4, the number of blinking times within a unit time is obtained, and the blinking frequency is obtained; 5, whether a user blinks abnormally or not is judged according to the blinking frequency, and the vibration reminder vibrates for reminding if it is judged that the user blinks abnormally. The intelligent glasses with the blinking detection function and the implementation method of the intelligent glasses can effectively protect the eyes in time.
Owner:GUANGZHOU HKUST FOK YING TUNG RES INST
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