Method for drawing ship distance line in real time based on reality augmentation system

Abstract

The invention provides a method for drawing a ship distance line in real time based on a reality augmentation system. The method comprises the following steps: establishing a model through 3D modeling; converting longitude and latitude data into three-dimensional coordinates, and placing the model in a display range; simplifying the three-dimensional coordinates into two-dimensional coordinates, establishing a line drawing area by taking the target ship as the center, selecting a plurality of representative points on the outer contour, and drawing calibration lines which respectively penetratethrough the representative points and are parallel to the X axis; drawing four measuring lines by taking the outer contours of other ships as a reference, solving coordinates of intersection points of the calibration lines and the measuring lines after the other ships enter a line drawing area, converting two-dimensional coordinates into three-dimensional coordinates, and drawing distance lines for connecting representative points and the intersection points through a line drawing function of a three-dimensional map. According to the method, real-time drawing is achieved, two points do not need to be manually selected in a three-dimensional map, the method has following performance and real-time performance, the drawing precision of the distance line is higher through analysis of AIS information and accurate transformation of the ship size, and compared with ship representation in an electronic chart, the drawing precision is higher.

Description

technical field [0001] The invention relates to the field of intelligent ship assisted driving, in particular to a method for drawing ship distance lines in real time based on a reality augmentation system. Background technique [0002] Intelligence is the development trend of modern ships. Modern ships are developing towards intelligence and efficiency in many aspects such as information perception, communication and navigation, energy efficiency control, condition monitoring and fault diagnosis, and early warning and rescue in distress. [0003] The existing electronic chart can measure the distance between two points by manually selecting the target point. In actual navigation, the position of the ship is constantly changing, and the distance measured by manually selecting two points cannot accurately reflect the real-time distance between the two points. distance, and the existing distance measurement methods are basically realized by selecting target points on a two-dim...

AI Technical Summary

Problems solved by technology

[0003] Existing electronic charts can measure the distance between two points by manually selecting target points. In actual navigation, the position of the ship is constantly changing, and the distance measured by manually selecting two points cannot accurately reflect the real-time distance between the two points. distance, and the existing distance measurement methods are basically achieved by selecting target points on a two-dimensional map

[0004] Moreover, the measurement method used on the two-dimensional map is not applicable in the three-dimensional interface. For large and medium-sized ships, there are many blind spots in the actual navigation process, which cannot be represented in the two-dimensional map. Although the three-dimensional map It can present the state of the ship in three dimensions, but it cannot show the distance from other ships in real time. Therefore, a method that can show the actual distance between the ship and other ships in real time on a three-dimensional map is needed, so as to provide intuitive visual effects , and at the same time, it is possible to know the distance between the ship and other ships in real time

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