Target positioning method and system

Abstract

The invention discloses a target positioning method and system, and relates to the technical field of target positioning. The method comprises the following steps: acquiring position coordinates of a projection point of a target point on a pixel plane of a camera in real time by using a camera carried on an aircraft; acquiring flight control data of the aircraft in real time; based on the flight control data, constructing a coordinate system transformation matrix for transforming the position coordinate of the target point from a camera coordinate system to an inertial coordinate system; and positioning the position coordinate of the target point in a world geographic coordinate system based on the position coordinate of the projection point and the coordinate system transformation matrix. According to the target positioning method of the embodiment of the invention, a laser ranging machine is prevented from being carried on the aircraft, the load weight and the cost of the aircraft are reduced, and the target positioning range of the target positioning method of the aircraft is improved.

Description

technical field [0001] The present invention relates to the technical field of target positioning, in particular to a target positioning method and system. Background technique [0002] At present, aerial photoelectric imaging systems are commonly used to detect and track ground targets. Aerial optoelectronic imaging systems are used on fixed-wing or other manned or unmanned aerial vehicles operating at high altitudes. To achieve ground target positioning, it is necessary to obtain the position and attitude of the photoelectric imaging system relative to the aircraft in real time, as well as the distance of the photoelectric imaging system relative to the ground target. The GPS information and inertial navigation data on the airborne side of the aircraft are transformed through the coordinate system to complete the target positioning. In the whole target positioning process, obtaining the distance value between the aircraft and the target is the key. [0003] In the prior...

AI Technical Summary

Problems solved by technology

[0006] Active target positioning technology relies on laser ranging, which is fast and accurate. However, the flying height unit of fixed-wing or other manned or unmanned aerial vehicles equipped with aerial photoelectric imaging systems is at the kilometer level, requiring high-power, high-speed Quality laser rangefinder machines, which increase the payload weight of the aircraft and also increase the cost of targeting

At the same time, the proportional positioning method used in the passive target positioning technology can only solve the position of the center of the image, and does not use the position information of the target point in the image, so the positioning limitation is large

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