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(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)
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 3 wearable computer. The trials demonstrate that a wearable computer with simple context-awareness yields superior performance to either Internet(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 presents the development and initial user trial of a wearable computer for collecting and annotating images for field-working applications. The application is based upon the need for field archaeologists to collect accurate records of finds, although it is proposed that the application can be easily adapted to a host of field-based activities.(More)
This paper presents a lossy, wavelet-based approach for the compression of digital angiogram video. An analysis of the high-frequency sub-bands of a wavelet decomposition of an angiogram image reveals significantly sized regions containing no diagnostically important information. The encoding of the high-frequency sub-band wavelet coefficients in such(More)