Computer Science

Computer Science ›› 2022, Vol. 49 ›› Issue (8): 150-156.doi: 10.11896/jsjkx.210700135

• Computer Graphics & Multimedia • Previous Articles     Next Articles

Dynamic Programming Track-Before-Detect Algorithm Based on Local Gradient and Intensity Map

CHEN Ying, HAO Ying-guang, WANG Hong-yu, WANG Kun   

  1. College of Information and Communication,Dalian University of Technology,Dalian,Liaoning 116024,China
  • Received:2021-07-13 Revised:2021-12-30 Published:2022-08-02
  • About author:CHEN Ying,born in 1996,postgra-duate.Her main research interests include track-before-detect algorithm for weak targets in infrared images and so on.
    HAO Ying-guang,born in 1968,asso-ciate professor.His main research in-terests include modeling complex time-varying systems and image processing algorithm.
  • Supported by:
    Fundamental Research Funds for the Central Universities of Ministry of Education of China(DUT21GF204).

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Abstract: Aiming at the low detection probability of traditional DP-TBD algorithm in the infrared weak and small targets images with high background complexity and low SNR,a dynamic programming track-before-detect algorithm based on local gradient and intensity map is proposed.Firstly,the algorithm uses the local gradient and intensity algorithm (LIG) to preprocess the frame sequence images to obtain a new measurement model.Then,a new value function is constructed according to the correlation of the value function of adjacent frames.Finally,the DP-TBD is used to accumulate the new value function in multiple frames,so as to realize the track-before-detect of small and weak targets.Monte Carlo simulation experiment results show that when the signal-to-noise ratio is lower than 4dB,the detection probability of this algorithm is about 10% higher than that of the traditional DP-TBD algorithm and DBT algorithm.At the same time,in the real infrared weak and small target sequence image with complex background,the algorithm can also effectively track the target before detection under the condition of a constant false alarm rate,which improves the detection probability of the target.

Key words: Dynamic programming, Infrared weak and small target, Inter-frame correlation, Local gradient and intensity, Track-before-detect

CLC Number: 

  • TP751
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