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Ship trajectory compression method and system based on ship behavior characteristics

A technology of ship trajectory and compression method, which is applied in the direction of instruments, character and pattern recognition, computer parts, etc., can solve the problem of not keeping the ship well, and achieve the effect of ensuring fluency and effective compression

Pending Publication Date: 2022-03-22
HANGZHOU DIANZI UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art methods, aiming at the problem that the traditional trajectory compression algorithm can not preserve the behavior of the ship well, a kind of ship trajectory compression method based on the behavior characteristics of the ship is proposed

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  • Ship trajectory compression method and system based on ship behavior characteristics
  • Ship trajectory compression method and system based on ship behavior characteristics
  • Ship trajectory compression method and system based on ship behavior characteristics

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Embodiment Construction

[0026] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. The specific steps are described as figure 1 shown, where:

[0027] Step 1: Collect the ship trajectory data generated by the smart ocean ship, and preprocess the missing value data in the ship trajectory;

[0028] The ship trajectory data includes the ship's speed, latitude and longitude, and time;

[0029] Use the linear interpolation method based on latitude and longitude information to repair the missing value of speed; use the linear interpolation method based on time to repair the missing value of latitude and longitude; use the linear interpolation method based on speed to repair the missing time value;

[0030] If the speed v i Values ​​are missing, where i represents the ith trajectory point. if v i-1 with a value of 5.1, v i+1 Value is 5.3, longitude lon i The value is 122.2, lon i-1 The value is 122.1, lon i+1 The...

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Abstract

The invention discloses a ship trajectory compression method and system based on ship behavior characteristics, and the method comprises the steps: carrying out the preprocessing of missing value data in a ship trajectory, and constructing a feature matrix; performing density-based clustering on the feature matrix I by using a DBSCAN algorithm to obtain track fragments of different ship behaviors; using a k-Means method to divide the trajectory segment into an anchoring stage, a sailing stage and a fishing stage; and carrying out adaptive compression on the ship trajectory according to different behaviors. According to the method, effective compression of the ship trajectory data is realized, the specific behavior characteristics of the ship trajectory are considered in the compression method, the consistency of the characteristics of the ship trajectory data before and after compression is ensured, the compression of the ship trajectory data is also realized, and the fluency of trajectory query related functions of a ship management system is ensured.

Description

technical field [0001] The invention belongs to the field of intelligent ocean, and relates to a ship track compression method and system based on ship behavior characteristics. Background technique [0002] In the context of Smart Oceans, illegal fishing is a key issue in marine fisheries management. Through the ship trajectory playback function in the fishing vessel management system, you can check the trajectory information of the fishing vessel over a period of time, and then analyze whether the fishing vessel has illegal fishing activities in the prohibited fishing area. However, when the query time range is too large, too much ship trajectory data will cause the following two problems: the first is the data transmission time problem, when the bandwidth is constant, the data transmission time is too long; the second is the software performance Problem, due to the upper limit of the memory of a single tab of the browser and the upper limit of the performance of the fron...

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Application Information

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IPC IPC(8): G06K9/62
CPCG06F18/2321G06F18/23213G06F18/2135G06F18/24137
Inventor 王雷袁俊峰张纪林欧东阳曾艳许洋刘震徐传奇于晓康
Owner HANGZHOU DIANZI UNIV
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