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Space-time trajectory compression and segmentation state expression method and device

A space-time trajectory and time trajectory technology, applied in special data processing applications, instruments, electrical digital data processing and other directions, can solve the problem of losing a large number of trajectory motion characteristics

Active Publication Date: 2021-02-26
中睿信数字技术有限公司
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Problems solved by technology

[0004] The present invention provides a method and device for space-time trajectory compression and segmented state expression, which are used to solve the problem of losing a large number of trajectory motion features in the prior art solutions

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  • Space-time trajectory compression and segmentation state expression method and device
  • Space-time trajectory compression and segmentation state expression method and device
  • Space-time trajectory compression and segmentation state expression method and device

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Embodiment Construction

[0061] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0062] like figure 1 As shown, an embodiment of the present invention provides a method for spatio-temporal trajectory compression and segmented state expression, the method comprising:

[0063] Step 1. Extract offline trajectories in batches to obtain time trajectory points; in the complete trajectory database, extract time trajectory points in the order of trajectory timestamps from early to late;

[0064] Step 2, performing initial filtering processing on the time track points; using a filtering algorithm to filter out noise and discrete values ​​of the time track points;

[0065] Step 3. Construct the trajectory point representation;

[0066] Step 4. Perform s...

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Abstract

The invention provides a space-time trajectory compression and segmentation state expression method and device. The method comprises the steps: extracting offline trajectories in batches; carrying outprimary filtering processing; constructing track point representation; carrying out secondary filtration and compression; and performing trajectory state expression based on the speed. The inventionprovides a space-time trajectory compression and segmentation state expression method and device, which not only can fully reserve the motion characteristics of the trajectory, but also can compress the redundant part of the trajectory, reduce the memory space, improve the efficiency of display expression, and solve the problem that part of trajectory characteristics are lost in the existing technical scheme.

Description

technical field [0001] The invention relates to the technical field of trajectory of moving objects, in particular to a method and device for space-time trajectory compression and segmented state expression. Background technique [0002] The trajectory of a moving object is a kind of data with a very wide range of applications. In principle, the more trajectory points, the better it can fit the actual movement of the object. It consumes a lot of computational cost, so it is necessary to remove redundant trajectory points while retaining motion features as much as possible. The proposal of the present invention is mainly applied to the sparse compression of massive space-time trajectory points. At the same time, it also explores the segmented feature expression of the trajectory, divides the trajectory as a whole according to certain rules, and expresses the motion state of the object in time segments, such as high-speed movement, low-speed Movement, wandering state, static ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M7/30G06F16/215G06F16/2457
CPCH03M7/30G06F16/215G06F16/24575
Inventor 张亦萍陈成斌叶智慧苏胜林马军亮
Owner 中睿信数字技术有限公司
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