133 results about "Global consistency" patented technology

A method and apparatus that determines the topology of a sequence of images and then globally aligns the images with respect to each image's neighboring images. The apparatus includes a topology determination module, a local coarse registration module, a local fine registration module, a global consistency module, and a color matching / blending module. To accurately render a mosaic image from a sequence of images the topology determination and global alignment processes are iterated to progressively produce accurately aligned images. The apparatus efficiently and accurately combines a plurality of source images into a seamless panoramic mosaic representation of a scene, of arbitrarily wide spatial and angular extent, regardless of the order of image acquisition.

A geographically distributed storage system for managing the distribution of data elements wherein requests for given data elements incur a geographic inertia. The geographically distributed storage system comprises geographically distributed sites, each comprises a site storage unit for locally storing a portion of a globally coherent distributed database that includes the data elements and a local access point for receiving requests relating to ones of the data elements. The and geographically distributed storage system comprises a data management module for forwarding at least one requested data element to the local access point at a first of the geographically distributed sites from which the request is received and storing the at least one requested data element at the first site, thereby to provide local accessibility to the data element for future requests from the first site while maintaining the globally coherency of the distributed database.

The invention relates to the technical field of mobile robot navigation and discloses a mobile robot cascading map building method based on remarkable scenic spot detection. The mobile robot cascading map building method comprises the steps of: 1) according to image data collected by a mobile robot sensor, carrying out on-line detection on a road sign of a natural scene corresponding to a remarkable scene so as to generate a topological node in a global map; 2) updating the pose of a mobile robot and a local grid map; and 3) building a global topological map structure by taking a remarkable scenic spot as the topological node, and optimizing the topological structure by introducing a weighted scanning and matching method and a relaxation method on the basis of the closed detection of trajectory of the robot to ensure the global consistency of the topological map. The mobile robot cascading map building method is applicable to the autonomous path planning and navigation application for various mobile robots in large indoor environment ranges such as a plurality of rooms and corridors.

A non-uniform memory access (NUMA) computer system includes a first node and a second node coupled by a node interconnect. The second node includes a local interconnect, a node controller coupled between the local interconnect and the node interconnect, and a controller coupled to the local interconnect. In response to snooping an operation from the first node issued on the local interconnect by the node controller, the controller signals acceptance of responsibility for coherency management activities related to the operation in the second node, performs coherency management activities in the second node required by the operation, and thereafter provides notification of performance of the coherency management activities. To promote efficient utilization of queues within the node controller, the node controller preferably allocates a queue to the operation in response to receipt of the operation from the node interconnect and then deallocates the queue in response to transferring responsibility for coherency management activities to the controller.

Method for analysis of hydrocarbon potential of subterranean regions by generating surfaces or geobodies and analyzing them for hydrocarbon indications. Reflection-based surfaces may be automatically created in a topologically consistent manner where individual surfaces do not overlap themselves and sets of multiple surfaces are consistent with stratigraphic superposition principles. Initial surfaces are picked from the seismic data (41), then broken into smaller parts (“patches”) that are predominantly topologically consistent (42), whereupon neighboring patches are merged in a topologically consistent way (43) to form a set of surfaces that are extensive and consistent (“skeleton”). Surfaces or geobodies thus extracted may be automatically analyzed and rated (214) based on a selected measure (213) such as one or more direct hydrocarbon indications (“DHI”), e.g. AVO classification. Topological consistency for one or more surfaces may be defined as no self overlap plus local and global consistency among multiple surfaces (52).

A synchronous localization and mapping method for vision-inertia-laser fusion mainly relates to the technical fields of multi-sensor fusion, SLAM and the like. In order to solve a problem that single sensor SLAM has low precision and is easy to lose in localization and mapping, the invention provides a robust high precision vision, inertia, laser radar fusion SLAM system. A tightly-coupled visual inertia odometer is further optimized through laser radar scanning and matching so as to obtain a more accurate localization result. And when a camera or a laser radar degenerates, and a visual inertia module or a scanning and matching module can not work normally, a system automatically integrates remaining workable modules to maintain stable pose estimation. In order to remove cumulative errors, loopback detection based on an appearance and neighboring matching based on point cloud are added, and then six-degree-of-freedom pose optimization is performed to maintain global consistency. In the invention, robust high-precision localization and mapping effects can be obtained.

The present invention provides a complex digital asset-orientated multi-stage PBFT (Practical Byzantine Fault Tolerance) consensus system and method. The complex digital asset-orientated multi-stage PBFT (Practical Byzantine Fault Tolerance) consensus system includes a transaction checker, a primary node self-checker, a transaction batch consensus device, a view rotator, a consensus message processor and a block builder; the transaction checker completes transaction-related consistency and security check during a commit phase; the primary node self-checker performs processing in a ViewChange message processing process; the transaction batch consensus device is responsible for batch processing of a plurality of transactions; the view rotator is used for completing the selection of a primarynode, the update of a new round of view and the recording of the information of a last view in a ViewChange protocol process so as to ensure the continuity of a new view; the consensus message processor achieves the global consistency of messages through a consensus processes at different stages; and the block builder can complete block-related transaction submission and sorting, as well as blockconstruction, block verification, block bifurcation-prevention guaranteeing and other operations.

A method for counting individuals in an image containing a dense, uniform or non-uniform crowd. The current invention leverages multiple sources of information to compute an estimate of the number of individuals present in a dense crowd visible in a single image. This approach relies on multiple sources, such as low confidence head detections, repetition of texture elements (using SIFT), and frequency-domain analysis to estimate counts, along with confidence associated with observing individuals in an image region. Additionally, a global consistency constraint can be employed on counts using Markov Random Field. This caters for disparity in counts in local neighborhoods and across scales. The methodology was tested on a new dataset of fifty (50) crowd images containing over 64,000 annotated humans, with the head counts ranging from 94 to 4,543. Efficient and accurate results were attained.

The invention discloses a synchronous positioning and composition algorithm based on point cloud segmentation matching closed-loop correction, and belongs to the technical field of robot autonomous navigation and computer graphics. According to the algorithm, inter-frame matching is carried out on feature points extracted from three-dimensional point cloud to obtain relative pose transformation ofthe robot, meanwhile, the obtained pose is stored at the rear end in a graph form, and then the point cloud is recorded based on the pose to form a map; the point cloud is fragemented and stored by using a point cloud segmentation and description algorithm, and the point cloud fragments are matched by using a random forest algorithm to form a closed-loop constraint condition; and finally, the historical poses and the map are corrected through a graph optimization algorithm to realize synchronous positioning and composition of the robot. According to the method, while the local positioning precision is ensured, the historical poses and maps are stored and corrected, accumulated errors in an outdoor long-distance environment are effectively reduced, and then synchronous positioning and composition of the robot with good global consistency are achieved.

The invention relates to a text generation image method based on cross-modal similarity and a generative adversarial network. The method comprises the steps that S1, training a global consistency model, a local consistency model and a relation consistency model by using matched and unmatched data, wherein three models are used for obtaining global representation, local representation and relationrepresentation of a text and an image respectively; S2, obtaining global representation, local representation and relation representation of the to-be-processed text by utilizing the trained global consistency model, local consistency model and relation consistency model; S3, connecting the global representation, the local representation and the relation representation of the to-be-processed textin series to obtain text representation of the to-be-processed text; S4, converting the text representation of the to-be-processed text into a condition vector by utilizing an Fca condition enhancement module; and S5, inputting the condition vector into a generator to obtain a generated image. Compared with the prior art, the method has the advantages of considering local and relation informationand the like.

The invention discloses a metadata sharing management method for multi-storage clusters under a wide area network environment. The problems that under the wide area network environment, metadata cannot be shared between the multi-storage clusters according to needs, and a global name space cannot provide user views which can be configured dynamically are solved, and an authority control technology, a global synchronization technology and a name space reconstitution technology are used. Efficient and matched file metadata inquire supporting is provided for an upper layer application. The method comprises the steps that a local name space stored locally is read, local metadata are screened according to authority setting rules at regular intervals and then are combined into global metadata information; the global name space stored locally in a catching mode is read, synchronization frequency is determined according to synchronization strategies, and meanwhile the global consistency is maintained according to an improved Paxos protocol; the user views are configured dynamically according view configuration rules. View configuration is an implementation process that a user or the upper layer application hopes to reorganize a global name space directory tree structure according to the metadata information.

A method for brain tumor segmentation in multi-parametric 3D MR images. The method comprises: pre-processing an input multi-parametric 3D MR image; classifying each voxel in the pre-processed multi-parametric 3D MR image, determining the probability that the voxel is part of a brain tumor, and obtaining an initial label information for the image segmentation based on the classification probability; constructing a graph based representation for the pre-processed image to be segmented; and generating the segmented brain tumor image using the initial label information and graph based representation. This method tries to exploit the local and global consistency of the image to be segmented for the tumor segmentation and can alleviate partially the performance degradation caused by the inter-subject image variability and insufficient statistical information from training.

A geographically distributed storage system for managing the distribution of data elements wherein requests for given data elements incur a geographic inertia. The geographically distributed storage system comprises geographically distributed sites, each comprises a site storage unit for locally storing a portion of a globally coherent distributed database that includes the data elements and a local access point for receiving requests relating to ones of the data elements. The and geographically distributed storage system comprises a data management module for forwarding at least one requested data element to the local access point at a first of the geographically distributed sites from which the request is received and storing the at least one requested data element at the first site, thereby to provide local accessibility to the data element for future requests from the first site while maintaining the globally coherency of the distributed database.

The invention provides an answer sheet filling information automatic recognition method based on comprehensive features of images. First, area image data of a choice question are acquired, morphological processing is performed on the area image data of the choice question, binarization is performed on a self-adaptive threshold, and contour detection and abnormal contour judgment are performed on a binarized image, relevant evaluation indexes are calculated through the original image, the morphologically-processed image and the binarized image, the filling result is judged through the evaluation indexes and the global consistency threshold obtained through calculation, finally, the recognition result is returned, and the global consistency threshold is updated. The method is compatible with answer sheets made of different kinds of paper, red filter sheets and answer sheets with half frames or full frames or letters in option areas, and has a high recognition speed and high robustness.

The invention provides a database operating method and device. The method comprises the following steps: receiving first transaction information and a current transaction snapshot at a first moment, wherein the current transaction snapshot comprises identifiers and states of transactions that have been started to be executed in a database set at the first moment; judging whether a target transaction exists in the transactions that have been started to be executed indicated by the identifiers, wherein the state of the target transaction is non-submitted, and data items involved in the target transaction comprise all or a part of data items involved in the first transaction; if the target transaction exists in the transactions that have been started to be executed, and when the operation indicated by the first transaction comprises a deletion operation and / or a modification operation, executing the operation indicated by the first transaction on a part of or all data items involved in the first transaction after the state of the target transaction is converted into submitted. By adoption of the database operating method and device provided by the invention, the problem that the data in the distributed transaction cannot achieve global consistency is solved.

The invention relates to the technical field of spatial databases, and discloses a database spatial sharding replication method and system. The method comprises the steps that a target distribution type database is deployed according to a specified spatial sharding scheme; the variation of spatial object records is captured in a source database space list in the target distribution type database; spatial relationship judgment is conducted on the spatial position information of the varied spatial object records and a spatial sharding rule, and if a divided spatial position relation is met, it is judged that the current spatial object records after variation need to be replicated to destination databases where corresponding spatial sharding areas are placed; according to the definition of data propagation, the varied spatial object records are replicated to the destination databases. According to the database spatial sharding replication method and system, the spatial data are stored in a sharding mode according to spatial position features, replication is achieved according to the specified spatial relationship rule, so that the updating synchronization efficiency of the spatial data under a distribution type environment is improved, the global consistency of spatial objects is supported and maintained, and a spatial distribution type application is simplified.

The invention relates to a modeling method for a substation-dispatching center two-level distributed type power grid, which belongs to the technical field of operation and control of an electric power system. The method includes that a network model containing a topological structure, device parameters and measuring information and a wiring scheme are built in each substation local and used for monitoring, analyzing and calculating the substation locals, and substation models and wiring schemes which are suitable for a dispatching center are led out automatically and transmitted to the dispatching center through an electric power dispatching data network; and at a dispatching center level, based on global consistency of line identification, all the substation network models are in butt joint to be automatically spliced into a global power grid model used for achieving monitoring, analysis and control of a whole network. The method achieves once modeling and whole network utilization, and provides a modeling basis for layered grading information processing and self-healing of the power grid.

The invention provides a method and a system for quickly matching images on the basis of feature states and global consistency. The method includes utilizing detection angular points as to-be-matched feature points and identifying feature neighborhood states of the feature points by the aid of state templates; utilizing the feature points as centers and computing main directions of descriptors; turning the main directions, describing feature neighborhoods of the feature points, combining binary texture features and statistic features with one another and creating RBT-OGMH feature descriptors; matching the images for two types of different descriptors by the aid of different types of similarity measurement; quickly determining transformation matrixes by the aid of consistent features of spatial domains on the basis of error fluctuation amplitude minimization clustering, and eliminating error matching point pairs to obtain ultimate correct matching point pairs. According to the technical scheme, the method and the system have the advantages that the method and the system have rotational invariance and certain scale invariance, and problems of image blurring, illumination change, low contrast and image deformation can be effectively solved; the method and the system are high in matching speed and precision as compared with the prior art.

The embodiment of the invention relates to an instant mapping and positioning method, device and system, and a storage medium. The method comprises the steps: obtaining a local binocular vision imageand a local three-dimensional laser point cloud image which can be collected at present; preprocessing the local binocular vision image and the local three-dimensional laser point cloud image; acquiring a local binocular vision map pose according to the preprocessed local binocular vision image; fusing the local binocular vision map pose with the preprocessed local three-dimensional laser point cloud image to obtain a local fusion map; and performing global consistency optimization on a global map according to the local fusion map to obtain a dense point cloud map, and outputting position information and attitude information at the current moment in real time to complete instant mapping and positioning. Through the method, a dense three-dimensional point cloud image with global consistencyis output, the current position information of the dense three-dimensional point cloud image is determined in real time, and instant mapping and positioning are completed.

The invention discloses an intrinsic image decomposition method based on multi-scale L0 sparse constraint. The method includes the following steps that reflectivity components (please see the symbol in the specification) are initialized, and a non-local zero paradigm sparse constraint model is used for obtaining a similarity measure WR of the reflectivity components among pixels; a similarity measure WS of the illumination components among the pixels is calculated; the reflectivity component R and the illumination component S of the layer are obtained by solving an optimization problem. Experimental results show that non-local zero paradigm sparse constraint can ensure global consistency of intrinsic image decomposition, by using the hierarchical iteration method, the efficiency problem of non-local zero paradigm sparse constraint expression is solved, and dependency on the chromaticity characteristics is reduced. According to standard data and tests, the accuracy of the results of the method is improved substantially, so that the intrinsic image decomposition method is beneficial for improving the results of intrinsic image decomposition.

A method and structure for an emulation system comprises of a plurality of field programmable gate arrays adapted to emulate nodes of a multi-node shared memory system, a plurality of cache directories, each connected to one of the arrays, and a plurality of global coherence directories, each connected to one of the arrays. Each of the global coherence directories maintain information on all memory lines remotely cached by each of the cache directories.

The invention discloses a method and system for concurrency control, belonging to the field of computers. The method comprises the following steps: receiving a global transaction by an initial storage server, and dividing the global transaction into a plurality of sub-transactions; if a write-operation sub-transaction exists in the sub-transactions, selecting a first number of copy storage servers by the initial storage server, and sending a locking request to each selected copy storage server; receiving the locking request by each selected copy storage server; if the locking request is permitted, sending a response message to the initial storage server; receiving the response message by the initial storage server; and sending the specific operation information of the write-operation sub-transaction to the copy storage server which sends the response message if the response messages of the second number are received. The system comprises the initial storage server and the copy storage server. According to the invention, the phenomenon of deadlock can be avoided, and the global consistency is guaranteed.

The apparatus thereof comprises a main control module and a distributing module. The method thereof includes: a) said distributing module reports a message not capable of routing by itself to said main control module; b) in term of said message, the main control module looks up ARP table; if a corresponding list item is found, and then synchronizing ARP data with said distributing module. The invention can make ARP data in distributing equipment keep global consistency. Besides, the invention determines the consistency of ARP data based on the message forwarding state so as to avoid loss of synchronization data or synchronization failure caused by adding ARP list item using software.

The invention discloses a composite fault estimation and fault tolerance control method for a high-speed railway traction rectifier, which belongs to the technical field of fault diagnosis and fault tolerance control and aims at achieving the purpose that in a condition in which uncertainty of variable parameter coupling exists in a high-dimensional rectifier fault model, the rectifier composite fault estimation and fault tolerance control method for the high-speed train can still accurately estimate the fault in a microsecond-level diagnosis time and the function self-healing capability of the system is improved. The method comprises the following steps: 1, through composite fault equivalent space transformation, a dimension-reduction composite fault evolution model is built; 2, a least square method based on a stable filter is adopted to recognize model parameters; 3, according to strategies such as decoupling analysis and feedforward compensation, a rectifier closed loop fault estimation model is built; and 4, a multivariable dynamic compensator is built for improving the robustness in a rectifier fault state. Thus, a model reference adaptive controller is designed to ensure the system to have global consistency and fast convergence properties.

The invention discloses a method for rendering character animation in an artistic manner with the assistance of a computer. The method is based on an illumination spherical model. The invention is characterized in that the illumination spherical model which extracts and creates an artistic style from a work of art is applied to rendering of a character model, so that coloring of an artistic style is realized conveniently and rapidly, and character animation can be manufactured as if by non-photorealistic rendering. By drawing on a method for rendering information about illumination on a sphere, the invention ensures that when a complex object which is uniform in illumination material is rendered, the illumination is consistent in an all-round manner. Because of extraction and application of the illumination spherical model, character rendering of the artistic style can be realized conveniently and rapidly only through simple interactive operation, so that rendering efficiency is improved. The invention solves the problems that the prior computer assisted animation has low rendering efficiency, and the traditional image technology cannot give expression to works of an artist flexibly.

The invention discloses a method and a device for constructing a topographic map based on a multi-quadrangle mesh. The method comprises the following steps: constructing a multi-quadrangle base mesh body composed of multiple quadrilateral surface patches according to topographic space data, and determining the adjacency information of each quadrilateral surface patch; selecting effective quadrilateral surface patches according to viewpoint parameters and a default resolution, wherein the effective quadrilateral surface patches are quadrilateral surface patches in a visible area of the multi-quadrangle base mesh body; triangularizing the effective quadrilateral surface patches in sequence, segmenting the effective quadrilateral surface patches into multiple triangular sub-patches, and determining the adjacency information of each triangular sub-patch; and performing combination according to the adjacency information of the effective quadrilateral surface patches and the adjacency information of the triangular sub-patches, and determining a combined topographic map. Global triangularization is performed by recording global adjacency information, seams are removed effectively during triangularized combination, the global consistency of mesh triangularization between surface patches is ensured, and extra seam sewing operation is avoided.

The invention provides a distributed database cluster system, a data synchronization method and a storage medium. The distributed database cluster system comprises a first synchronous clock module, afirst data synchronization module and a plurality of first database groups, each first database group in the plurality of first database groups comprises a first main database, and the first synchronous clock module is used for periodically sending a clock synchronization instruction; and the first data synchronization module is used for respectively packaging database operation instructions recorded by each first main database between two adjacent clock synchronization instructions sent by the first synchronization clock module into a first operation instruction block and sending the first operation instruction block. According to the method and the device, the problem that global consistency of time points can not be achieved by data synchronized by different data nodes in related technologies is solved, so that data records synchronized by different data nodes are based on the same time reference point, and the global consistency of the recorded data is ensured.