Tim Ritchings

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Intelligent agent systems have been the subject of intensive research over the past few years; they comprise one of the most promising computing approaches ever, able to address issues that require abstract modelling and higher level reasoning. Virtual environments, on the other hand, offer the ideal means to produce simulations of the real world for(More)
There is an increasingly pressing need to develop document analysis methods that are able to cope with images of documents containing printed regions of complex shapes. Contrary to the bounding-box representation used in most past page segmentation and classification approaches which assume rectangular regions, there is a need for a more flexible(More)
Intelligent multi-agent systems are currently used for a variety of purposes, both in research and for real-world applications. One of their most interesting, yet not fully explored uses, is as frameworks to support computer-based simulations of virtual worlds inhabited by lifelike entities, that is, intelligent virtual environments, for purposes of(More)
Objective assessment techniques for classifying voice quality for patients recovering from treatment for cancer of the larynx should lead to more effective recovery than the present approach, which is very subjective and depends heavily on the experience of the individual Speech and Language Therapist (SALT). This work follows an earlier study where an(More)
The work describes an automated method of tracking dynamic ultrasound images using a normalized cross-correlation algorithm, applied to the patellar and gastrocnemius tendon. Displacement was examined during active and passive tendon excursions using B-mode ultrasonography. In the passive test where two regions of interest (2-ROI) were tracked, the(More)
This paper describes a prototype system for the objective assessment of voice quality in patients recovering from various stages of laryngeal cancer. A large database of male subjects steadily phonating the vowel /i/ was used in the study, and the quality of their voices were independently assessed by a speech and language therapist (SALT) according to(More)