Raymond Leung

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This study investigates random accessibility and efficiency enhancements in highly scalable video and volumetric compression. With the advent of interactive multimedia technology, random accessibility has emerged as an increasingly important consideration in the design and optimization process. In this paper, we assess the impact that the transform,(More)
Highly scalable video compression based on invertible motion adaptive lifting transforms has emerged as a promising area in image processing research and an important component in interactive multimedia technology. However, within this feed-forward framework , the potential for coding efficiency improvement and its impact on random accessibility still has(More)
BACKGROUND In the United States, more than 600 municipalities have smoke-free parks, and more than 100 have smoke-free beaches. Nevertheless, adoption of outdoor smoke-free policies has been slow in certain regions. Critical to widespread adoption is the sharing of knowledge about the policy development and implementation process. In this article, we(More)
An important problem in medical imaging is that of ef¿cient volumetric image compression. In addition to compression ef¿-ciency, scalable representations which allow access to the data at various qualities up to and including lossless reproduction are particularly important. Also important is the ability to access local regions of the volumetric data set or(More)
This study evaluated the validity and reliability of the Chinese-translated (Cantonese) versions of the Borg 6-20 Rating of Perceived Exertion (RPE) scale and the Children's Effort Rating Table (CERT) during continuous incremental cycle ergometry with 10- to 11-yr.-old Hong Kong school children. A total of 69 children were randomly assigned, with the(More)
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