43results about How to "Reduce the amount of redundant data" patented technology

Transparent content addressable data storage and compression for a file system including providing a data structure that associates file identifiers and retrieval keys for memory blocks for storing file contents; storing in the data structure one or more file identifiers; providing a chunk of data comprising a quantity of input data of a file; retrieving a memory block from computer memory; searching for a segment of the chunk that matches the memory block; and if a matching segment is found: discarding the matching segment; providing a retrieval key for the memory block as a retrieval key for the matching segment; identifying an unmatched portion of the chunk that does not match the memory block; storing the unmatched portion; and providing a retrieval key for the unmatched portion.

A method of compiling a computer program to improve trace efficiency is disclosed. The computer program comprises a plurality of trace operations for triggering output of trace data generated by said computer program, and the method of compiling comprises the steps of: transforming said computer program into code forming an intermediate version of said computer program; analysing said transformed code; replacing at least some of said trace operations with modified trace operations; transforming said code into code suitable for execution on a data processing system; and generating translation data relating said modified trace operations to said trace operations they replaced.

This invention relates to a forward EC method in single-way broadcast document transmission including the following steps: 100) depacketizing the to-be-sent data into multiple data blocks and computing the check sum of each data block; 200) processing XOR operation to the said multiple data blocks and computing protection data blocks; 300) sending contents of the data blocks including the protection ones; 400) receiving the data blocks; checking if the acquired data blocks are correct and making identifications; 500) adding up numbers of error data blocks; if there is only one error data block which has been accepted as a protection block, then correcting the mistake; and 600) direct split joint is carried out to resume the data in light of the coding rule, if there is no data error.

A distributed, deduplicated storage system according to certain embodiments is arranged in a parallel configuration including multiple deduplication nodes. Deduplicated data is distributed across the deduplication nodes. The deduplication nodes can be networked together and communicate with one another according using a light-weight, customized communication scheme (e.g., a scheme based on FTP or HTTP). In some cases, deduplication management information including deduplication signatures and/or other metadata is stored separately from the deduplicated data in deduplication management nodes, improving performance and scalability.

The invention relates to a method for carrying out three-dimensional reconstruction on an intestinal canal by using VTK (Visualization Tool Kit). In the method, the three-dimensional reconstruction is directly carried out on the basis of VTK. The method comprises the following steps of: first, carrying out filtering and volume data segmentation on original human body CT scanning data including noise so as to obtain CT data of an intestinal canal tissue; interpolating the data in order to obtain a better reconstruction effect; interpolating the volume data by using a morphological method; and then designing an algorithm for high efficiently solving multiplanar reconstruction ambiguity according to MarchingCubes multiplanar reconstruction theory. During multiplanar reconstruction, color, scattered light and scattered light intensity are well set according to the characteristics of the intestinal canal. It is shown by experiment results that a three-dimensional intestinal canal can be realistically reconstructed at a higher reconstruction speed by using the three-dimensional intestinal canal reconstruction algorithm provided by the invention.

The embodiment of the invention relates to a data compression method and device, and belongs to the technical field of data processing. The method comprises the following steps: performing abstractingprocessing on the fields in an original data table and the entries in the fields to obtain a dimension space corresponding to the fields and discrete points corresponding to the entries; dividing thediscrete points into a set of discrete points according to the dimension space to which the discrete points belong and the distance between the discrete points; constructing a discrete point tree structure according to the distance between the discrete points in the discrete point set; deleting the same field between the discrete point corresponding to the root node and the discrete point corresponding to the child node in the tree structure, and retaining the difference field. The method solves the problem that the terminal equipment is overburdened due to the redundant data in each table item in the prior art, and reduces the amount of redundant data and the burden of the terminal equipment at the same time.

The invention discloses a power transmission line image and point cloud data processing method and system, and the method comprises the steps: collecting a power transmission line image and point cloud data, and building a mapping relation between each pixel coordinate of the power transmission line image and each point cloud space coordinate in the point cloud data; performing space division on the point cloud data, and generating index data according to a space division result; performing compression processing on the point cloud data; based on the index data, storing the compressed point cloud data; according to the method, loading of redundant data can be reduced, the time required for loading the point cloud data is shortened, and the response speed is increased.

The invention discloses a focusing method and device, and an electronic device, belongs to the technical field of communication, and can solve the problem of poor shooting effect of the electronic device caused by a blurring phenomenon of an image shot by the electronic device after focusing. The method comprises steps: acquiring target light corresponding to a to-be-photographed object through a target spectrum assembly, the target spectrum assembly being M spectrum filters or FPI multispectral assemblies, and M being a positive integer; according to the target light, obtaining a target image sequence and a phase difference information set of a target object through a real-sensing pixel sensor, each frame of image in the target image sequence corresponding to one piece of phase difference information in the phase difference information set, and the target object being an object in a moving state in the to-be-photographed object; and controlling a camera of the electronic device to focus according to the target image sequence and the phase difference information set. The embodiment of the invention is applied to the focusing process of the electronic device.

The invention discloses a language recognition method and device, and an electronic device, belongs to the technical field of communication, and can solve the problems of relatively low efficiency and success rate of information recognition of a human face moving part by the electronic device. The method comprises the following steps: acquiring target light corresponding to a human face part of a to-be-photographed object through an FPI multispectral component; according to the target light, acquiring a target image sequence of a target part through a real sensing pixel sensor, and the target part being a part in a moving state in the human face part; and outputting language information corresponding to the target part according to the target image sequence. The embodiment of the invention is applied to the process that the electronic device carries out information identification on the human face moving part.

The embodiment of the invention provides a video transmission method, device and system, which can reduce the generation of redundant data in VR video transmission, reduce the transmission burst bandwidth and reduce the swivel high-definition display delay MTHR. The method comprises the steps that a terminal sends first view angle information to a server through a first link according to a first period, and correspondingly, the server receives the first view angle information from the terminal through the first link according to the first period; and after determining that the first view angle information is the latest view angle information according to a second period, the server obtains data of a first frame image corresponding to the first view angle information, and sends the data of the first frame image to the terminal through a second link; and correspondingly, the terminal receives the data of the first frame image from the server through the second link according to a second period.

The invention relates to a pseudo-analog channel coding method and device based on two-dimensional chaotic coding, and the method specifically comprises the steps: S1, enabling a transmitting end to obtain video pixel data needing to be transmitted, performing the 3D-DCT operation of the video pixel data, obtaining a 3D-DCT coefficient, and performing the standardization processing of the 3D-DCT coefficient; S2, performing coding protection on a low-frequency data part in the 3D-DCT coefficient by adopting two-dimensional chaotic coding, transmitting a high-frequency data part according to original SoftCast, performing power distribution and whitening operation on data needing to be transmitted, and then sending the data to a receiving end; S3, enabling a receiving end to perform LLSE decoding according to the received data, performing data recovery on a coded low-frequency data part by using two-dimensional chaotic decoding, performs inverse DCT operation according to a 3D-DCT coefficient obtained by decoding, and performing arrangement according to the sequence of each pixel block in video pixel data to obtain a reconstructed video. Compared with the prior art, the method has the advantages that the utilization capability of the bandwidth is remarkably improved under the condition of low signal-to-noise ratio, and the like.

The invention relates to a DMD-based spectral imaging target detection method and system, and the method comprises the steps: controlling a DMD to carry out the m times of low-resolution global roughscanning (m is greater than or equal to 1) of an image formed by an unknown scene, determining an approximate region (p is greater than or equal to 1) of p useful target images on a DMD working surface, reducing the bandwidth of micro-mirror scanning, and performing high-resolution fine scanning (n is greater than or equal to 1) on the useful area for n times so as to acquire enough useful information, and detection and identification of all local useful targets in an unknown scene can be realized.

The invention provides an on-orbit calibration device and on-orbit calibration method for pointing precision of a remote sensor. The device includes a calibration processing module, a filter component, and an imaging component, wherein the filter component is mounted on the imaging component to filter out the light sources outside the range of a calibration source spectrum, and only enable a calibration light source passing through the optical path system of the remote sensor to be calibrated to pass through; the imaging area of the imaging component includes a calibration area and an imagingarea, the calibration area is located at the edge of the imaging area, the surface of the calibration area is installed with the filter component, and the calibration area receives an optical signal of the calibration light source passing through the filter component, converts the optical signal into an electrical signal, and outputs the electrical signal to the calibration processing module; theimaging area receives the optical signal of an observation target, converts the optical signal of the observation target into an electrical signal, and outputs the electrical signal to an external digital transmission subsystem; and the calibration processing module determines the position coordinate of the calibration light source on the imaging component according to the electrical signal of thecalibration light source, and completes the on-orbit calibration of the pointing accuracy of the remote sensor. The on-orbit calibration device and on-orbit calibration method for pointing precisionof the remote sensor have the advantages of compact structure, convenient installation and high reliability.

The invention discloses a data transmission method applied to network access point equipment. The method comprises the steps: receiving first request information which is transmitted by a terminal andis used for obtaining basic data and second request information which is transmitted by the terminal and is used for obtaining differential data; if detecting that the basic data is cached by the network access point equipment, sending second request information to the server; receiving differential data corresponding to the second request information returned by the server; and sending the basicdata and the differential data to the terminal. The data transmission efficiency can be improved.

The invention discloses a full-data measurement path planning method for an aero-engine blade. The method comprises the following steps: determining a clamping mode of a sensor; installing the sensor according to the clamping mode of the sensor, selecting -30 degrees, -15 degrees, 0 degree, 15 degrees, 30 degrees, 150 degrees, 165 degrees, 180 degrees, 195 degrees and 210 degrees to measure the blade to obtain scanning data, and planning a measurement path of blade profile data; and optimizing the planned measurement path, and realizing full-data measurement of the blade profile. According to the invention, the clamping mode of the laser line scanning sensor and design of the measurement path are utilized, so that measurement of the blade molded surface data blade basin and blade back part is realized, measurement of front and rear edge data is also realized, and complete data of the blade molded surface is obtained. In addition, through an optimization strategy of an experiment path, rapid measurement of blade profile data is realized.

The invention provides a safety Top-k checking method and device in a double-layer sensor network; the method comprises the following steps: receiving and storing first data reports sent by a sensor node Si in a same network unit, receiving a Top-k checking request sent by a base station, and determining a to-be-checked data report set from locally stored all first data reports according to a to-be-checked network unit ID, a to-be-checked time slot number and a to-be-checked sensor node set; ranking items (see formula in description) in the to-be-checked data report set from big to small according to EMOPE {di, j}, and determining Top-k data items according to a to-be-checked Top-k data item number k; determining the number ni of Top-k data items contained in each first data report RT<Si>in the to-be-checked data report set according to the Top-k data items; forming a second data report of each to-be-checked sensor node according to a perception data item number Mu i and the Top-k data item number ni, and carrying out data integrity detection for the checking result report. The method can protect data item and weight privacy, and can reduce inter-node communication overhead in thesame time.

The invention relates to a seat locking and ticket buying method and device based on caching and a storage medium, and belongs to the technical field of the Internet. The locking method comprises thefollowing steps: reading locking information input by a user; Updating the seat cache set according to the locking information; After the seat cache set is updated successfully, updating a user cachecorresponding to the user; The ticket buying method comprises the steps of reading seat ticket buying information input by a user; When the seat ticket buying information is consistent with the locking information stored in the cache system, returning to successful ticket buying; The device comprises a processor and a memory, a computer program is stored in the memory, and when the computer program is executed by the processor, the locking method is achieved; A computer program is stored in the medium, and when the computer program is executed by the processor, the locking method is achieved.Compared with the prior art, the method has the advantages of high interface response speed, data space saving and the like.