Sandra I. Woolley

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In this paper, current applications of wearable computers are reviewed and categorized according to dimensions of “time” and “reference.” The time dimension is based on whether the system uses information that is stored, information that is current, or information that can help in predicting future events. The reference dimension is concerned with the type(More)
A novel method for the compression of angiogram video sequences is presented. The approach consists of a 3D wavelet encoding algorithm, incorporating a region of interest (ROI) estimation model to provide higher-quality image reconstruction in areas considered to be diagnostically significant. This is coupled with a texture modelling procedure, which(More)
A new method for the compression of angiogram video sequences is presented. The method is based on the philosophy that diagnostically significant areas of the image should be allocated the greatest proportion of the total allocated bit budget. The approach uses a three-dimensional wavelet-coder based on the popular set partitioning in hierarchical trees(More)
This paper describes a multistage perceptual quality assessment (MPQA) model for compressed images. The motivation for the development of a perceptual quality assessment is to measure (in)visible differences between original and processed images. The MPQA produces visible distortion maps and quantitative error measures informed by considerations of the(More)
In this paper, we present two contextually-aware mobile systems: one suited to the indoor museum environment and one to outside environments. Our concern is with producing devices that involve minimal interaction. Both systems are designed to respond to changes in the user’s location to modify the information displayed, i.e., the user interacts with the(More)
This paper presents a user-centered mobile health device to help people with life-threatening allergies request emergency services in the case of an anaphylactic attack. The device was designed as a support tool to directly assist anaphylactic people and their carers, as opposed to a medical resource designed for practitioners. It makes use of multimedia(More)
Does the use of a wearable context-aware computer increase task proficiency? User trials have been carried out in an attempt to answer this question. The study involves WECAPC software developed to run on the χ wearable computer. The trials demonstrate that a wearable computer with simple context-awareness yields superior performance to either Internet(More)
This paper presents the digital imaging results of a collaborative research project working toward the generation of an online interactive digital image database of signs from ancient cuneiform tablets. An important aim of this project is the application of forensic analysis to the cuneiform symbols to identify scribal hands. Cuneiform tablets are amongst(More)