Method for taking candid photograph of ship in inland waterway as well as system

Abstract

The invention discloses a method for taking a candid photograph of a ship in an inland waterway as well as a system. Adaptability improvement is performed on an operation way of an existing marine RFID card reader, a directional external narrow beam antenna is adopted for restraining an active area of the RFID card reader, when a target ship pulls in a riverway range covered by the narrow beam antenna, the RFID card reader can timely receive marine RFID electronic tag information at close range and generates a trigger signal, and video capturing equipment is triggered to be linked with a flashing light and perform synchronous candid photograph capture on the target ship, so that the problems that the traditional marine RFID card reader is too large in the active area and a photograph of multiple ships can be easily taken are solved, and accurate and reliable candid photograph capture on a single target ship when multiple ships enter the inland waterway is realized. The method disclosedby the invention fuses various kinds of data, namely basic information of a ship in an AIS, RFID tag information of the ship as well as video data and image data of the target ship, into feature dataof the target ship, so that the feature data of the target ship is more complete, and confidence level is higher.

Description

technical field [0001] The invention belongs to the technical field of port and shipping, and in particular relates to a ship capturing method and system for inland waterways. Background technique [0002] Ships in inland waterways are equipped with marine RFID electronic tags, which are used to identify ships. Marine RFID card readers are generally installed on waterway embankments, which are used to identify tags, and the identified data is used to distinguish different ships. Marine RFID electronic tags and marine RFID card readers together form an inland waterway ship radio frequency identification system. Some video surveillance and capture equipment are often installed on the side of the channel to monitor the passing ships in the channel. Usually, because these capture devices themselves do not have the ability to identify target ships, they are only triggered by marking lines and areas, and the misidentification rate is high. And the capture is not allowed. [000...

AI Technical Summary

Problems solved by technology

[0004] The Chinese invention patent with the publication number CN103971543A uses laser sensors, cameras and RFID to realize the automatic identification and monitoring of ships. However, the problem of triggering RFID by laser sensors is that the working distance of laser sensors is shorter than that of RFID, resulting in multiple ships in the monitoring area. Being monitored at the same time and appearing in the camera, it is impossible to accurately capture a single ship. In addition, laser sensors are expensive, and the data volume of point cloud information is huge, which cannot be directly applied to monitoring and storage

[0005] The main shortcomings of the existing radio frequency identification system for inland ships are: 1. In the field of ships, the marine RFID card reader has a working distance of up to 300m, so once the ship approaches the card reader 300m, it may be recognized, but in In this 300m area, there may be multiple ships identified, and it is difficult to determine the trigger time synchronized with the capture system; 2. The effective distance of the capture device to obtain a clear capture effect is less than 300m, and the clarity of the captured photos of ships 300m away is poor; 3. 1. The capture area is a small sector, while the RFID card reader's action area is a large sector. Using a large sector to guide a small sector will inevitably lead to inaccurate problems.

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