Improving the false alarm capabilities of the maximum average correlation height correlation filter

Influence of perturbations in a hybrid digital-optical correlator

“…Various types of filters have been proposed in the literature [11][12][13][14]. Mahalanobis et al [11] introduced the MACH filter in 1994, which has been proved to be a powerful correlation filter.…”

“…In order to incorporate all or some of these distortions, a variety of filters in a large number are required to be synthesized. In literature [11][12][13][14], a large number of distortion-invariant filters are reported. Most notably the synthetic discriminant function filter [3] and its variants are used.…”

“…Pattern recognition using optical techniques, one of the most important and promising applications, has generated considerable amount of interest in the optics community for last few decades [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. As a result, optical correlator systems have now been started appearing in the market place [15].…”

Advances in Adaptive Composite Filters for Object Recognition

“…The GMACH filter h GMACH (Alkanhal et al, 2000), can be seen as a trade-off between a filter with EOC constraints and the MACH filter. Note, that the correlation output at the origin for …”

“…Thus, MACH filters are robust to distorted versions of the target which are not included in the training set (called intraclass distortions). Several versions of MACH filters exist, among these the generalized MACH (GMACH) filter achieves the lowest variations in correlation peaks among the set of training images (Alkanhal et al, 2000;Nevel & Mahalanobis, 2003). This means that the GMACH filter yields an optimized response to intraclass distortions.…”