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Open AccessFeature PaperArticle

Entropy-Based Low-Rank Approximation for Contrast Dielectric Target Detection with Through Wall Imaging System

1
Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
2
Osaka Institute of Technology Osaka, Osaka Prefecture 535-8585, Japan
*
Author to whom correspondence should be addressed.
Electronics 2019, 8(6), 634; https://doi.org/10.3390/electronics8060634
Received: 29 April 2019 / Revised: 26 May 2019 / Accepted: 30 May 2019 / Published: 5 June 2019
In through wall imaging, clutter plays an important role in the detection of objects behind the wall. In the literature, extensive studies have been carried out to eliminate clutter in the case of targets with the same dielectric. Existing clutter reduction techniques, such as the sub-space approach, differential approach, entropy-based time gating, etc., are able to detect a single target or two targets with the same dielectric behind the wall. In a real-time scenario, it is not necessary that targets with the same dielectric will be present behind the wall. Very few studies are available for the detection of targets with different dielectrics; here we termed it “contrast target detection” in the same scene. Recently, low-rank approximation (LRA) was proposed to reduce random noise in the data. In this paper, a novel method based on entropy thresholding for low-rank approximation is introduced for contrast target detection. It was observed that our proposed method gives satisfactory results. View Full-Text
Keywords: through-wall imaging; contrast target detection; clutter reduction; entropy thresholding; low-rank approximation through-wall imaging; contrast target detection; clutter reduction; entropy thresholding; low-rank approximation
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Bivalkar, M.; Singh, D.; Kobayashi, H. Entropy-Based Low-Rank Approximation for Contrast Dielectric Target Detection with Through Wall Imaging System. Electronics 2019, 8, 634.

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