Implementation of the Maximum Average Correlation Height (MACH) filter in the spatial domain for object recognition from clutter backgrounds

Akber Gardezi; Philip Birch; Ioannis Kypraios; Rupert Young; Christopher Chatwin

doi:10.1117/12.850216

12 May 2010 Implementation of the Maximum Average Correlation Height (MACH) filter in the spatial domain for object recognition from clutter backgrounds

Akber Gardezi, Philip Birch, Ioannis Kypraios, Rupert Young, Christopher Chatwin

Author Affiliations +

Proceedings Volume 7696, Automatic Target Recognition XX; Acquisition, Tracking, Pointing, and Laser Systems Technologies XXIV; and Optical Pattern Recognition XXI; 76961S (2010) https://doi.org/10.1117/12.850216
Event: SPIE Defense, Security, and Sensing, 2010, Orlando, Florida, United States

Abstract

A moving space domain window is used to implement a Maximum Average Correlation Height (MACH) filter which can be locally modified depending upon its position in the input frame. This enables adaptation of the filter dependant on locally variant background clutter conditions and also enables the normalization of the filter energy levels at each step. Thus the spatial domain implementation of the MACH filter offers an advantage over its frequency domain implementation as shift invariance is not imposed upon it. The only drawback of the spatial domain implementation of the MACH filter is the amount of computational resource required for a fast implementation. Recently an optical correlator using a scanning holographic memory has been proposed by Birch et al [1] for the real-time implementation of space variant filters of this type. In this paper we describe the discrimination abilities against background clutter and tolerance to in-plane rotation, out of plane rotation and changes in scale of a MACH correlation filter implemented in the spatial domain.

Citation Download Citation

Akber Gardezi, Philip Birch, Ioannis Kypraios, Rupert Young, and Christopher Chatwin "Implementation of the Maximum Average Correlation Height (MACH) filter in the spatial domain for object recognition from clutter backgrounds", Proc. SPIE 7696, Automatic Target Recognition XX; Acquisition, Tracking, Pointing, and Laser Systems Technologies XXIV; and Optical Pattern Recognition XXI, 76961S (12 May 2010); https://doi.org/10.1117/12.850216

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