Infrared small target detection based on bilateral filtering algorithm with similarity judgments

Yanbei Li; Yan Li

doi:10.1117/12.2070949

20 November 2014 Infrared small target detection based on bilateral filtering algorithm with similarity judgments

Yanbei Li, Yan Li

Proceedings Volume 9300, International Symposium on Optoelectronic Technology and Application 2014: Infrared Technology and Applications; 93000P (2014) https://doi.org/10.1117/12.2070949
Event: International Symposium on Optoelectronic Technology and Application 2014, 2014, Beijing, China

Abstract

Infrared small target detection is part of the key technologies in infrared precision-guided, search and track system. Resulting from the relative distance of the infrared image system and the target is far, the target becomes small, faint and obscure. Furthermore, the interference of background clutter and system noise is intense. To solve the problem of infrared small target detection in a complex background, this paper proposes a bilateral filtering algorithm based on similarity judgments for infrared image background prediction. The algorithm introduces gradient factor and similarity judgment factor into traditional bilateral filtering. The two factors can enhance the accuracy of the algorithm for smooth region. At the same time, spatial proximity coefficients and gray similarity coefficient in the bilateral filtering are all expressed by the first two of McLaughlin expansion, which aiming at reducing the time overhead. Simulation results show that the proposed algorithm can effectively suppress complex background clutter in the infrared image and enhance target signal compared with the improved bilateral filtering algorithm, and it also can improve the signal to noise ratio (SNR) and contrast. Besides, this algorithm can reduce the computation time. In a word, this algorithm has a good background rejection performance.

Citation Download Citation

Yanbei Li and Yan Li " Infrared small target detection based on bilateral filtering algorithm with similarity judgments", Proc. SPIE 9300, International Symposium on Optoelectronic Technology and Application 2014: Infrared Technology and Applications, 93000P (20 November 2014); https://doi.org/10.1117/12.2070949

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KEYWORDS

Infrared radiation

Infrared imaging

Detection and tracking algorithms

Infrared detectors

Target detection

Optical filters

Signal to noise ratio

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