Optical hit–miss morphological transform

Abstract

We present an optical correlator implementation of the morphological hit–miss transform. This provides improved recognition of objects in clutter compared with standard optical pattern-recognition correlator techniques. The hit–miss transform is modified to use rank-order filtering since this gives better performance in noise and clutter. By varying the correlation plane threshold, we can perform dilations, rank-order filters, and erosions on the same multifunctional coherent optical correlator system. We quantify the thresholds required for generic object part recognition and provide simulated and optical laboratory data.

© 1992 Optical Society of America

One-step implementation of the optical hit–miss transform

Shifu Yuan, Minxian Wu, Yingbai Yan, and Guofan Jin
Appl. Opt. 35(35) 6881-6887 (1996)

Nonlinear optical hit–miss transform for detection

Roland Schaefer and David Casasent
Appl. Opt. 34(20) 3869-3882 (1995)

Optically computing the hit–miss transform for an automated cervical smear screening system

John L. Metz and Kristina M. Johnson
Appl. Opt. 39(5) 803-813 (2000)

Hit-or-miss representation of a pattern spectrum and its optical implementation

Ning Wang and Liren Liu
Appl. Opt. 35(35) 6888-6895 (1996)

Morphological and wavelet transforms for object detection and image processing

Anqi Ye and David Casasent
Appl. Opt. 33(35) 8226-8239 (1994)