The affine matched filter

A. Schaum; Richard Priest

doi:10.1117/12.817409

27 April 2009 The affine matched filter

A. Schaum, Richard Priest

Proceedings Volume 7334, Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XV; 733403 (2009) https://doi.org/10.1117/12.817409
Event: SPIE Defense, Security, and Sensing, 2009, Orlando, Florida, United States

Abstract

The hyperspectral matched filter (MF) is a popular tool in remote sensing problems for locating objects that extend over several pixels. However, it is ideally suited only for the detection of sub-pixel targets with known mean signature in radiance space. Here we develop an alternative affine matched filter (AMF) that is more appropriate for detecting extended targets, and which accommodates practical uncertainties in target signature knowledge. In particular, AMF is ideal when used in conjunction with another new method we develop, called Virtual Relative Calibration (VRC), for generating a radiance space representation of a laboratory reflectance signature. VRC is related to the QUick Atmospheric Correction(QuAC) method but is much simpler. We also devise and test an extension of AMF that is meant to reduce false alarms caused by dark pixels. This Joint AMF (JAMF) expands the standard statistical model of hyperspectral backgrounds to accommodate variable illumination levels, analogously to how AMF treats target level uncertainty.

Citation Download Citation

A. Schaum and Richard Priest "The affine matched filter", Proc. SPIE 7334, Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XV, 733403 (27 April 2009); https://doi.org/10.1117/12.817409

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