A 4D tracking system and method for a target through a scattering medium

Abstract

The invention provides a 4D tracking system and method for a target through a scattering medium. It solves the technical problem that the traditional target tracking method cannot perform multi-dimensional tracking of the target behind the occluder. The system includes: LED light source, lens, target, scattering medium, optical filter and detector. Using the 4D tracking method, first, collect multiple speckle images, perform denoising preprocessing on all speckle images, obtain the autocorrelation calculation results of all denoising speckle images, and combine the correlation coefficient calculation algorithm to obtain the rotation angle of the target theta. According to the autocorrelation area and the object-image relationship, the motion result of the target along the optical axis direction z is obtained. Then, according to the autocorrelation and cross-correlation results, the motion results of the target in the x and y directions are obtained. The target 4D tracking system through scattering medium of the present invention has simple structure, low cost, simple tracking method, high tracking precision and wide application range, and has broad application prospects in biomedical imaging, military, civil and other fields.

Description

technical field [0001] The invention belongs to the technical field of computational imaging and target tracking, and relates to a 4D optical tracking technology capable of tracking targets behind occluders, specifically a 4D tracking system and method for targets through scattering media, which can be widely used in biological Medical imaging, astronomy, traffic safety and other fields. Background technique [0002] Target tracking technology has always been a hot research topic in the fields of computer vision, biomedicine, astronomy, and earth observation. Target tracking technology can be used to track targets in image sequences. For example, in human-computer interaction design, it is necessary to track human targets feature tracking and identification, in the field of biomedicine, tracking and processing of a certain moving cell in biological tissue, in the field of earth observation, tracking of moving targets such as vehicles and aircraft, etc., according to these ac...

AI Technical Summary

Problems solved by technology

This method is not easily affected by the observation angle, has strong robustness, high accuracy of model matching and tracking, is suitable for various movement changes of maneuvering targets, and has strong anti-interference ability. The update is more complicated and the real-time performance is poor

[0009] The radar tracking method is another target tracking method other than the above-mentioned machine vision. It can realize the continuous measurement and automatic tracking of the distance, azimuth and elevation angle of the target. However, radar tracking mostly uses mechanical scanning to obtain target information. The tracking system is relatively complex, and its working band is easily absorbed and interfered, the real-time tracking performance is poor, and the signal processing algorithm is complex

[0010] The target tracking method and radar tracking method in the above machine vision can track the target, but most of them have the problems of low tracking accuracy, complex tracking system, poor real-time performance, complex calculation, insufficient tracking target information obtained, and narrow application range. And when encountering serious occlusion, none of the above methods can realize target tracking, or the tracking dimension is not high. For the tracking of moving targets, when the target passes through biological tissue or fog, haze and other occlusions, its original visual contour information is almost completely lost, resulting in the inability to track the target, which limits the comprehensive tracking capabilities of existing tracking technologies.

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