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A tracking-before-detection method for maneuvering weak targets with interactive multi-mode Bernoulli filtering

A weak target detection and interactive technology, applied in the direction of electromagnetic wave re-radiation, radio wave measurement system, measurement device, etc., can solve the problem of target loss of tracking, achieve detection and tracking, and overcome the effect of unsatisfactory tracking performance

Active Publication Date: 2021-04-30
GUILIN UNIV OF ELECTRONIC TECH
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Problems solved by technology

[0005] What the present invention aims to solve is the problem of target loss in the existing detection and tracking methods in the case of low signal-to-noise ratio (SNR) when weak and small targets undergo large maneuvers. Tracking method, which combines the interactive multi-mode method on the basis of Bernoulli particle filter, adopts the tracking algorithm before detection of particle filter, and realizes the precise detection and tracking of weak and small maneuvering targets

Method used

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  • A tracking-before-detection method for maneuvering weak targets with interactive multi-mode Bernoulli filtering
  • A tracking-before-detection method for maneuvering weak targets with interactive multi-mode Bernoulli filtering
  • A tracking-before-detection method for maneuvering weak targets with interactive multi-mode Bernoulli filtering

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[0031] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in combination with specific examples and with reference to the accompanying drawings.

[0032] Reference attached figure 1 , the present invention a kind of interactive multi-mode Bernoulli filtering maneuver weak target detection pre-tracking method, its specific steps are as follows:

[0033] Step 1, initialize the target state.

[0034] According to the target motion scene, set the target particles (including persistent living particles and newborn particles) and state parameters at the initial moment, including target position, speed, intensity, existence probability, model weight probability and weight of target sampling particles. Use the parameters set above as the initial distribution of the target, use Gaussian distribution to sample a fixed number of initial surviving particles and newborn particles,...

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Abstract

The invention discloses an interactive multi-mode Bernoulli filter tracking method for maneuvering weak targets before detection. On the basis of the Bernoulli particle filter, the interactive multi-mode method is used to carry out sampling particles of each target state in the filter. Then, the predicted particles are substituted into the traditional Bernoulli TBD algorithm to update the estimation of target existence probability and distribution density. The invention can effectively detect and track the weak maneuvering target under the condition of low signal-to-noise ratio, and can estimate the state of the target more accurately.

Description

technical field [0001] The invention relates to the technical field of target detection and tracking, in particular to an interactive multi-mode Bernoulli filter tracking method for maneuvering weak targets before detection. Background technique [0002] The problem of infrared small target detection and tracking in complex backgrounds with low signal-to-noise ratio has been difficult to solve. The reason is that in the long-distance images obtained, the target imaging area is small, the detected signal is relatively weak, and the target is submerged by a large amount of noise, resulting in image The signal-to-noise ratio is very low, and the target cannot be detected from a single image, and the target may appear or disappear at an unknown time point, and useful target features such as shape and texture cannot be obtained, making small target detection difficult. stand up. Single-frame image processing can no longer achieve reliable detection and tracking of targets, and i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/48G01S17/66G01S17/89G06T7/20
CPCG01S7/4802G01S17/66G01S17/89G06T7/20G06T2207/20024
Inventor 吴孙勇刘义强薛秋条蔡如华宁巧娇孙希延纪元法
Owner GUILIN UNIV OF ELECTRONIC TECH
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