Ship height measurement method and system

Abstract

The present application discloses a method for calculating the height of a ship, which includes: acquiring a three-dimensional point cloud of a ship on the water surface; projecting the three-dimensional point cloud onto a target plane to obtain a corresponding two-dimensional point cloud, the target plane being parallel to the vertical Direction; in the target plane, process the two-dimensional point cloud, and fit the straight line representing the intersection position of the ship and the water surface, that is, the hull-water surface intersection line; in the target plane, calculate the two-dimensional point cloud and the fitted hull ‑The furthest distance from the intersection of the water surface as the height of the ship. The application also discloses a ship height measuring and calculating system. According to the embodiment of the present invention, the height detection of the ship can be performed more flexibly, and at the same time, it is beneficial to reduce the calculation amount of height measurement and improve the efficiency of measurement and calculation.

Description

technical field [0001] The present invention relates to a three-dimensional measurement technology, in particular to a ship height measurement method and system based on laser three-dimensional scanning technology. Background technique [0002] When a ship passes through a lock or bridge, in order to avoid collision accidents due to the height of the ship or the container it carries, it is necessary to measure the height of the ship by remote sensing. For this purpose, different ship height measurement techniques have been developed. For example, the ship height measurement technology based on image processing uses a camera to shoot a ship, and then obtains the ship height by processing the captured image. In addition, a ship height measurement technology based on laser 3D scanning has also been developed. For example, Chinese patent CN109178234A discloses a ship freeboard height measurement system, which uses a water level gauge and a laser radar installed under a bridge ...

AI Technical Summary

Problems solved by technology

Correspondingly, the existing ship height measurement technology is affected by the installation design and measurement principle of the device, the working distance is limited, and it cannot be moved flexibly, so the flexibility of use is insufficient

[0004] In addition, for the height measurement method based on the three-dimensional data of the ship, it is true that the highest point of the ship can be searched and the height of the ship can be calculated based entirely on the three-dimensional data, but this often requires high computing power of the system, and the calculation time is long, which is not conducive to rapid take height measurements

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