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Moving target positioning method based on wide beam laser ranging and single camera

A single-camera, laser ranging technology, applied in the field of camera measurement, laser ranging and target positioning, to achieve simple and convenient results

Active Publication Date: 2014-06-25
NAT UNIV OF DEFENSE TECH
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem that the existing narrow-beam laser range finder needs a turntable to assist in tracking when measuring a moving target, the present invention proposes a method for three-dimensional positioning of a moving target by using a wide-beam laser range finder and a single camera

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  • Moving target positioning method based on wide beam laser ranging and single camera
  • Moving target positioning method based on wide beam laser ranging and single camera
  • Moving target positioning method based on wide beam laser ranging and single camera

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Embodiment Construction

[0019] 1. Use Zhang Zhengyou's single camera calibration method (Z. Zhang, Flexible camera calibration by viewing a plane from unknown orientations, proceedings of the Fifth International Conference on Computer Vision, 1999, pp.666-673) to accurately calibrate the internal parameters of the camera, and get Intrinsic parameter matrix , the first-order radial distortion coefficient K.

[0020] 2. Install the wide-beam rangefinder and camera on the same measurement platform, and install a reflective prism on the target to ensure the stability of the installation.

[0021] 3. The wide-beam rangefinder emits laser beams, and the prism installed on the target to be measured receives the laser light and reflects it in the opposite direction. The wide-beam rangefinder receives the reflected laser light. t, the speed of light c, the distance of the target to be measured can be obtained .

[0022] 4. At the same time, the camera is used to shoot the target to be measured, and the i...

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Abstract

The invention discloses a method for positioning a moving target through a wide beam laser range finder and a single camera, aiming to achieve the effect that the moving target is positioned under high precision through the wide beam laser range finder and the single camera. According to the technical scheme, the method comprises the steps of precisely calibrating inner parameters of the camera in advance, additionally arranging a reflection prism on the target to be measured, measuring a distance from the target to be measured to the camera through the wide beam laser range finder, and shooting the target to be measured through the camera to obtain an angular altitude and an azimuth angle from the camera to the target to be measured; finally obtaining the space position of the space target. The moving target is positioned through the wide beam laser range finder and a shooting measurement measure of the single camera. The measurement range is about 10 degrees, the distance is about 5km, and the precision is up to 1m.

Description

technical field [0001] The invention relates to the fields of camera measurement, laser ranging, target positioning and the like, in particular to a moving target positioning method based on wide-beam laser ranging and a single camera. Background technique [0002] Photogrammetry technology uses the collinear relationship between the moving target and its image in the camera to measure the spatial position of the target. It has the advantages of low cost and high precision, and has been relatively mature in the field of target positioning. According to the number of cameras used in the measurement process, photogrammetry methods can be divided into multi-eye measurement methods and monocular measurement methods. The monocular measurement method can obtain the spatial position of the target to be measured by using one camera, which is flexible and simple, and has a wide range of applications. Traditional monocular measurement uses a camera and a narrow beam (generally less ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/00G01C11/00G01S17/08
CPCG01C11/00G01C21/00G01S17/08
Inventor 孙祥一赵哲周朗明
Owner NAT UNIV OF DEFENSE TECH
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