One of the major weakness of existing peer-to-peer networks is that their overlay structures do not match well with the physical underlying network topology. In this paper, we present a Geographical Longest Prefix Matching (Geo-LPM) scheme whereby nodes selforganise themselves into clusters such that nodes in the same cluster are close to each other in terms of network latency and membership. G...

1047-3203/$ see front matter Crown Copyright 2 doi:10.1016/j.jvcir.2009.10.003 * Corresponding author. Fax: +886 3 3272038. E-mail address: [email protected] (S.-J. Wa In this paper, a novel vector quantization (VQ)-based digital image watermarking scheme is proposed which retains high image quality even after embedding. The general scheme of watermarking is to embed a representative digit...

image denoising by block matching and threedimensionaltransform filtering (bm3d) is a two steps state-ofthe-art algorithm that uses the redundancy of similar blocks innoisy image for removing noise. similar blocks which can havesome overlap are found by a block matching method and groupedto make 3-d blocks for 3-d transform filtering. in this paper wepropose a new block grouping algorithm in th...

We analyse the impact of the provision of care on the health and quality of life (QoL) of mature female informal caregivers using a representative sample drawn from the Survey of Health, Ageing and Retirement in Europe (SHARE). We match each informal caregiver with a non-carer using Propensity Score matching and test whether matched individuals differ on self-assessed health and a functional in...

Geo-spatial applications need to provide powerful search capabilities to support users in their daily activities. However, discovery services are often limited by only syntactically matching user terminology to metadata describing geographical resources. We report our work on the implementation of a geographical catalogue, and corresponding semantic extension, for the spatial data infrastructur...

This paper presents a video-based camera tracker that combines marker-based and feature point-based cues in a particle filter framework. The framework relies on their complementary performance. Markerbased trackers can robustly recover camera position and orientation when a reference (marker) is available, but fail once the reference becomes unavailable. On the other hand, feature point trackin...

Rapid near infrared (NIR) spectroscopic analysis models were developed to distinguish the geographical origin and determine the content of Polygonum perfoliatum L. The spectra of 94 samples of differing origin were recorded using two NIR instruments (Antaris II and Nicolet 6700). The spectral pretreatment methods used were the first-derivative (FD) and the standard normal variate correction (SN...