Analytical framework for determining the robustness of linear feature mapping for target detection

Xiaoli Yu; An Mei Chen; Lawrence E. Hoff; Irving S. Reed

doi:10.1117/12.210862

5 June 1995 Analytical framework for determining the robustness of linear feature mapping for target detection

Xiaoli Yu, An Mei Chen, Lawrence E. Hoff, Irving S. Reed

Proceedings Volume 2487, Algorithms for Synthetic Aperture Radar Imagery II; (1995) https://doi.org/10.1117/12.210862
Event: SPIE's 1995 Symposium on OE/Aerospace Sensing and Dual Use Photonics, 1995, Orlando, FL, United States

Abstract

The incorporation of linear feature mapping into a maximum likelihood ratio test criterion makes possible a novel realizable adaptive detector of a 2D resolved signal with limited priori knowledge of the target signal pattern and the nonstationary clutter. As demonstrated by experiments on actual SAR data, the detection probability of the test depends strongly on the effective generalized signal-to-noise ratio (EGSNR), which is determined by the selected feature mapping and representation. In this paper, an analytical framework is proposed for the linear feature mapping detector (LFMD), within which various linear feature mappings, such as the short time Fourier transform (STFT), the discrete cosine transform, the discrete wavelet transform, and the discrete Gabor transform, etc. can be compared in a systematic way in terms of detection performance. The closed-form solution of the porblem is obtained and tested by using the SRI ultra wideband (SAR) data, which is single polarization with 200MHZ to 400MHz band at 1 meter resolution. The robustness of the LFMD with several linear mappings is compared for classifying multi-oriented targets in actual SAR image. Several different classes of targets including both civilian and noncivilian vehicles imaged at broadside and head-on are used for the study. Also the effect of an inaccurate priori knowledge of the target's significant features on the value of the EGSNR is investigated.

Citation Download Citation

Xiaoli Yu, An Mei Chen, Lawrence E. Hoff, and Irving S. Reed "Analytical framework for determining the robustness of linear feature mapping for target detection", Proc. SPIE 2487, Algorithms for Synthetic Aperture Radar Imagery II, (5 June 1995); https://doi.org/10.1117/12.210862

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KEYWORDS

Signal detection

Synthetic aperture radar

Target detection

Discrete wavelet transforms

Sensors

Associative arrays

Error analysis

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