220 results about "Data compaction" patented technology

A method for compressing a stream of application layer network traffic communicated over a transport layer connection of a virtual private network connection between a client and a server using an appliance. The appliance intercepts one or more transport layer packets of a stream of application network traffic communicated via a transport layer connection of a virtual private network connection between a client and a server. The appliance accumulates data from a payload of the intercepted transport layer packets, determines data accumulated for transmission should be compressed based on one or more compression trigger, and compresses the accumulated data into a self-contained compression block for transmission.

The present invention extends to methods, systems, and computer program products for end-to-end optimization of data storage and transmission of data. Details of how data is stored within a data store are exposed to clients and applications. Clients and applications are enabled to makes requests to data stores to obtain data as it is actually stored upon within the data store to eliminate redundant processing of the requested data. Compression and de-duplication of data within a data store are leveraged to increase the efficiency and reduce latency of data transmitted over a LAN or WAN.

Prediction-based compression engines are spoon-fed with sequentially efficiently compressible (SEC) streams of input data that make it possible for the compression engines to more efficiently compress or otherwise compact the incoming data than would be possible with streams of input data accepted on a TV-raster scan basis. Various techniques are disclosed for intentionally forming SEC input data streams. Among these are the tight packing of alike files or fragments into concatenation suitcases and the decomposition of files into substantially predictably consistent (SPC) fragments or segments that are routed to different suitcases according to their type. In a graphics-directed embodiment, image frames are partitioned into segment areas that are internally SPC and multidirectional walks (i.e., U-turning walks) are defined in the segment areas where these defined walks are traced during compression and also during decompression. A variety of pre-compression data transformation methods are disclosed for causing apparently random data sequences to appear more compressibly alike to each other. The methods are usable in systems that permit substantially longer times for data compaction operations than for data decompaction operations.

The invention relates to a dynamic monitoring system and method for an aerial quick response. The dynamic monitoring method comprises the steps that the dynamic monitoring system is built, aerial photography data are classified and marked while real-time monitoring is conducted, and retrieval, browsing and post treatment, including splicing and target positioning, of images of interest can be quickly completed after a flight mission is accomplished. According to the dynamic monitoring system and method for the aerial quick response, a data acquisition process during a flight and a data processing process after the flight are related through interest marks, and fast retrieval of the aerial photography data is greatly facilitated; meanwhile, through the strategy that original high-resolution images and size-compressed images are connected, as a result, it is guaranteed that the data compaction process is quick, and reconnaissance application value of high-resolution detail information is retained.

The invention concerns a data compaction method and system for an intermediate program. The method consists in searching the program (1000) for identical sequences (Si) and counting Ni number of occurrences of each sequence (Si), a comparison test (1001) to find the superiority of a function f(Ni) to a reference value enables to generate (1003) a specific instruction of a specific code (Ci) with which the sequence (Si) is associated, replacing (1004) each occurrence in the sequence (Si) by the specific code (Ci) in the intermediate program to create a compacted intermediate program (FCC) with which an executing file (FEX) is associated. The invention is applicable to multiple application portable objects such as microprocessor cards, onboard systems of the like.

The invention relates to the technical field of geographical information systems and provides a vector data compaction and compression method based on virtual screen mapping theory as well as a corresponding decompression method. The vector data compaction and compression method includes the following steps of: determining the size of a virtual screen; conducting Douglas compaction on segmental arc coordinate; conducting virtual screen mapping on the coordinate; conducting offset storage and compression on the segmental arc coordinate; and packing data after compaction and compression and conducting general lossless compression. The methods can be widely applied to the vector data compaction and compression in the fields of GIS, Web, GIS, MovingGIS and car navigation, and can compact and compress the volume of vector data dramatically on condition of meeting visual fidelity.

The invention discloses a map data compaction method facing to mobile devices, belonging to the map service field facing to the mobile device. The method comprises: 1) according to the requirement of map display in mobile application, determining map display levels facing to the mobile device; 2) according to the map display level, setting map layers and entity thereof to be displayed on the corresponding level map; 3) simplifying geometric attributes of the displayed entity on each level of the map; 4) partitioning the displayed map of the simplified map on each level, wherein the size of the partition is fixed as 255 coordinate unit*255 coordinate unit, the side of the partitioned coordinate unit of the data partition in different levels can be adjustable; 5) adopting binary data flow to storing and transmitting the partitioned map data. Compared with the prior art, the invention has small data volume and high plotting performance on the basis of ensuring better map display effect.

The present invention provides a method and a system for generation of a three-dimensional panoramic image based on zooming stereoscopic vision. The method employs two-dimensional images shot in different focal lengths to perform accurate image processing and analysis, employs an algorithm to calculate three-dimensional point cloud data of the image and performs point cloud data compaction, registration and splicing to finally generate a three-dimensional panoramic image. The system comprises two portions consisting of hardware and software, wherein the hardware comprises a monocular zooming image collection device, a storage device and a processor, and the software portion comprises an image processing program, a matching program and a splicing program. The implementation method can perform camera calibration, and a point cloud splicing method capable of graying, image enhancement, image feature extraction, dense matching, three-dimensional point cloud calculation, three-dimensional monocular vision can perform three-dimensional reconstruction of the image; and moreover, a mode is broken that a traditional camera shooting angle cannot satisfy demands, and the method and the systemfor generation of the three-dimensional panoramic image based on zooming stereoscopic vision can perform omnibearing appearance of basic construction of a target object.

The invention provides a spacecraft flight data analysis and recording device, system and method. The device is installed inside the spacecraft, including: a data acquisition module, a data storage and protection module, a data rapid analysis and interpretation module, and a telemetry and positioning launch module; The data acquisition module acquires multi-channel spacecraft data, sends the data to be stored to the data storage and protection module, and sends the performance monitoring data to the data rapid analysis and interpretation module; the data storage and protection module compresses and stores the data to be stored; The data rapid analysis and interpretation module quickly interprets the performance monitoring data online, and outputs the fault data to the telemetry and positioning launch module; the telemetry and positioning launch module downloads the fault data and is used to launch emergency positioning after the spacecraft touches the ground Signal. The invention can monitor the on-orbit status of the spacecraft, diagnose faults and transmit the data to the ground, and can analyze the status of the spacecraft when the spacecraft falls to the earth.

The invention relates to a large thin-walled component complex curved surface mirroring processing method, and belongs to the technical field of large thin-walled component processing, and especiallyrelates to a large thin-walled component complex curved surface mirroring processing method. An employed processing device is laid in a bilaterally symmetrical structure, the specially-produced processing device is employed to carry out measuring and mirroring processing, a line laser sensor is employed to measure a workpiece, a current vortex sensor is employed to measure displacement with respect to the workpiece surface, and a piezoelectric transducer is employed to measure the value of a support force. Noise removal, data compaction, data splicing are carried out on measured data, and a target curved surface is generated. Processing path planning and support path planning are carried out, a local normal vector and a dynamic support force are measured, and mirroring milling is carried out. According to the invention, after once clamping installation, measuring and mirroring processing can be carried out on the thin-walled component, and the large thin-walled component complex curvedsurface mirroring processing method is good in measuring real-time performance, high in accuracy and convenient to use. Accurate milling of thin-walled components can be achieved, the processing precision is high, and the surface quality is high after processing.

The automatic compressing/decompressing file system and its compressing algorithm features that one magnetic disc storage block abstract layer integrated to physical memory hardware is added into common file system and physical memory of storing compressed data to separate common file system from compressed disc data and support multiple file system modules. The magnetic disc storage block abstract layer contains virtual disc logic data block storing space, long structure physical storing data block mapping layer and data compressing/decompressing layer. In the system data compressing algorithm, each new character is created with two characters available in dictionary. The present invention is especially suitable for embedded system and can raise greatly the utilization of embedded equipment resource, especially memory resource, and improve its performance.

The invention discloses a local curved surface change factor based scattered point cloud data compaction processing method. The local curved surface change factor based scattered point cloud data compaction processing method comprises the steps of 1 reading measured point cloud data, 2 calculating a central point of a point cloud, 3 searching dynamic K neighborhood points of the central point based on cubic grids and accordingly establishing the topological relation of scattered point cloud, 4 adopting a variance component method to calculate curved surface change factors of a k neighborhood of the central point, 5 determining the compaction rate of each cubic grid in the k neighborhood of the central point and performing even compaction in within a k neighborhood range. The topological relation of the scattered point cloud is established by establishing the dynamic K neighborhood point information of the scattered point cloud. Complicated curvature calculation is replaced by the curved surface change factors. The compaction ratio is adjusted according to the curved surface change factors Xi, even compaction within the k neighborhood range is achieved, the detail characteristic of high curvature can be protected, and planar characteristic of low curvature is also protected when the compaction degree is high. Point cloud data processing and curved surface reconstruction efficiency and accuracy are improved.