A comparison of neural networks and subspace detectors for the discrimination of low-metal-content landmines

Blaine A. Nelson; Deborah Schofield; Leslie M. Collins

doi:10.1117/12.487220

11 September 2003 A comparison of neural networks and subspace detectors for the discrimination of low-metal-content landmines

Blaine A. Nelson, Deborah Schofield, Leslie M. Collins

Author Affiliations +

Proceedings Volume 5089, Detection and Remediation Technologies for Mines and Minelike Targets VIII; (2003) https://doi.org/10.1117/12.487220
Event: AeroSense 2003, 2003, Orlando, Florida, United States

Abstract

Low-metal content landmines can be particularly difficult to detect and classify. Their responses are often less than that of indigenous clutter and the small amounts of asymmetrically distributed metal results in significant changes in the signature of the mine as the sensor to target orientation varies. A number of algorithms have been previously developed in order to aid in target classification and reduce the false-alarm rate. In our work, multiple data sets were collected for each of five targets, of varying metal content, at several sensor to target heights and horizontal displacements using a prototype frequency-domain EMI sensor, the Geophex GEM-3. The data was then evaluated using one of three classification algorithms including a neural network, a matched filter, and a normalized matched filter. Here, a One Class One Network (OCON) architecture in which only one neural network makes a decision was selected for use. We will discuss the training and testing process for this algorithm. We will also show that the neural network performed much better than the matched filter but slightly worse than the normalized matched filter. In addition, the results demonstrate the necessity of training the algorithms with spatially collected data when precise sensor centering is not possible.

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Blaine A. Nelson, Deborah Schofield, and Leslie M. Collins "A comparison of neural networks and subspace detectors for the discrimination of low-metal-content landmines", Proc. SPIE 5089, Detection and Remediation Technologies for Mines and Minelike Targets VIII, (11 September 2003); https://doi.org/10.1117/12.487220

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