Use this URL to cite or link to this record in EThOS:
Title: Optical phase-only correlation and image processing
Author: Chisholm, Ian W.
Awarding Body: University of Edinburgh
Current Institution: University of Edinburgh
Date of Award: 1996
Availability of Full Text:
Access from EThOS:
Full text unavailable from EThOS. Please try the link below.
Access from Institution:
The potential of the instantaneous Fourier transforming ability of optical systems is now being tapped. In particular, optical correlation is more and more becoming the focus of attention by current research groups with its many applications in the fields of machine vision, pattern identification and target tracking. This thesis gives a comprehensive view of the current state of the science of optical correlation and describes the many factors affecting experimental results of typical correlation systems including algorithmical errors and limitations and optical effects such as noise or phase inconsistency. The uses and types of spatial light modulator used in such systems are described and, in particular, the reflective electronically addressed liquid crystal over silicon modulator used in this thesis. Liquid crystal mesophases are examined and their light modulating effects analysed with respect to their applications in optical systems. Current optimisation algorithms and techniques are analysed and an adaptive stochastically self-correcting correlator system is described. Results are presented as computer simulations and sample optical processing architectures are described. These illustrate the benefits of such a technique on physical systems with the capability of cancelling out the effects of imperfections in objects and filters and indeed in the optics themselves.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available