Center-surround filters for the detection of small targets in cluttered multispectral imagery: background and filter design

Chyuan-Huei Thomas Yang; Mark S. Schmalz; Wen-Chen Hu; Gerhard X. Ritter

doi:10.1117/12.211360

20 June 1995 Center-surround filters for the detection of small targets in cluttered multispectral imagery: background and filter design

Chyuan-Huei Thomas Yang, Mark S. Schmalz, Wen-Chen Hu, Gerhard X. Ritter

Author Affiliations +

Proceedings Volume 2496, Detection Technologies for Mines and Minelike Targets; (1995) https://doi.org/10.1117/12.211360
Event: SPIE's 1995 Symposium on OE/Aerospace Sensing and Dual Use Photonics, 1995, Orlando, FL, United States

Abstract

Center-surround (CS) fields have long been identified in the human visual system as having properties of edge enhancement that facilitate the detection, location, and tracking of small objects. Unfortunately, the automatic digital implementation of such capabilities is not straightforward, since digital computers lack the neural functionality and connectivity inherent in the retina, optic chiasm, geniculate nuclei, and visual cortex. In this paper, we discuss efficient techniques for implementing CS detectors in terms of a class of nonlinear filters. In particular, we emphasize image enhancement schemes that cue the registration of CS detectors over the target, thus rendering our filters implementationally feasible in terms of hit rate and computational cost. Examples are given of the CS detectors that we call the adaptive Double- Gated and Triple-Gated filters (DGF and TGF). Such filters account for spatial nonstationary input. We further show how the DGF and TGF are useful for object detection in multispectral imagery. Analyses emphasize error and computational cost in practical sensing scenarios.

Citation Download Citation

Chyuan-Huei Thomas Yang, Mark S. Schmalz, Wen-Chen Hu, and Gerhard X. Ritter "Center-surround filters for the detection of small targets in cluttered multispectral imagery: background and filter design", Proc. SPIE 2496, Detection Technologies for Mines and Minelike Targets, (20 June 1995); https://doi.org/10.1117/12.211360

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