Radar echo display method under Android system

Abstract

The invention discloses a radar echo display method under an Android system. The radar echo display method disclosed by the invention comprises the following steps: constructing a mapping table from polar coordinates to rectangular coordinates and two texture buffer areas with the same size in memory; updating parts that do not need high-speed refreshing such as an azimuth circle, a range marker circle, a ship bow line and the like on a radar image into one texture buffer area; receiving and analyzing echo data of a radar antenna, storing the frame data into an echo buffer area, and updating the data in the buffer area into the other texture buffer area; and finally, performing rendering display on the screen by virtue of an OpenGL texture mapping technology and a multiple texture mixing technology. According to the radar echo display method disclosed by the invention, the radar display content is divided into two display layers in the Android system, the content of each display layeris independently refreshed, the rendering efficiency is improved, and the method does not depend on any specific hardware.

Description

Technical field [0001] The invention relates to the field of navigation and navigation, in particular to a radar video image display method. Background technique [0002] Ship navigation radar is used to detect icebergs, reefs, ships, floating ice and other objects on the sea, and can provide effective target position and distance information, so that ships can avoid various obstacles and prevent collision accidents. Essential navigation equipment for sailing. The main features of modern shipboard navigation radar display systems are digital information processing, efficient information display, and easy-to-use human-computer interaction. The implementation methods are mostly System on Chip (SOC) platforms or ARM (Advanced RISC Machines). ) Is the core embedded platform. As an important bridge between the radar operator and the radar system, the radar display and control terminal has many functions such as radar video image drawing, target recognition and tracking, and ship inf...

AI Technical Summary

Problems solved by technology

The first two methods have additional requirements on hardware, requiring GPU to support hardware acceleration or Alpha blending rendering; the third method has complex hardware design and is difficult to maintain and upgrade

In addition, the human-computer interaction experience of the display and control terminal developed by the above method is poor

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