Complex water area target tracking method based on AIS (automatic identification system) and active cameras

Abstract

The present invention discloses a complex water area target tracking method based on an AIS (automatic identification system) and an active camera. The method comprises the following steps that: 1) an observation area is divided into n cells, each camera of an active camera group is separately calibrated according to each cell, so that the intrinsic parameters and extrinsic parameters of the cameras are obtained; (2) the AIS device is utilized to calibrate the cells in advance, and calibration information is stored, after a target object enters a relevant cell, the cell where the target object is located is determined according to position information returned by the AIS; (3) the active camera group is made to rapidly move to the area of the cell where the target is located, wherein the active camera group contains m active cameras; and (4) the clear video image of the target object is shot, and the target object is tracked according to an tracking algorithm. According to the method of the invention, a new image pickup idea is provided; and the cell division mode is adopted, and the AIS system and the cells are combined to determine the position and heading of the target object.

Description

technical field [0001] The invention relates, in particular, to a complex water target tracking method based on AIS and an active camera. Background technique [0002] In recent years, inland shipping has played an increasingly important role in the development of the national economy. With the increase in the number of inland ships, the navigation environment has continued to deteriorate, and the safety of inland waterways has become increasingly prominent. Therefore, the monitoring of complex inland waters It is particularly important. At present, the common monitoring methods mainly include visual monitoring, radar monitoring, and AIS monitoring. Radar monitoring has a wide range of applications, but it has inherent shortcomings, that is, it will fail in rainy, foggy, and heavy smog weather. Similarly, there are similar problems in visual monitoring. Combining visual monitoring and AIS device monitoring to monitor ships can greatly solve the above problems, effectively en...

AI Technical Summary

Problems solved by technology

This method uses the UAV to locate and track the target, and can obtain clear images of the target. However, this method cannot coordinate with the ship to control, nor can it automatically track and monitor the fixed ship.

The main feature of this method is that the reconnaissance is concealed, but this feature also causes the method to only capture partial images of the target object

[0006] c. A patent invented by the 28th Research Institute of China Electronics Technology Group Corporation: a CCTV ship video smooth tracking method (published patent number: 105430326A), the feature of this invention is that the CCTV camera and AIS track and shoot the target ship together , to solve the problem of picture shaking during the shooting process, but this method cannot shoot high-definition images of the target, and at the same time, it does not adjust the tracking speed of the video according to the speed of the target object. Finally, the invention uses the AIS positioning method, but the AIS positioning There is a certain error in the method itself, therefore, the positioning effect of the invention is not very accurate

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