When a three-dimensional wavelet decomposition is used for compression of hyperspectral images, spectral ringing artifacts can arise, manifesting themselves as systematic biases in some reconstructed spectral bands. More generally, systematic differences in signal level in different spectral bands can hurt compression effectiveness of spatially low-pass subbands. The mechanism by which this occ...

This paper presents a method of objective evaluation of the edge blur and ringing artefacts produced by image codecs. It is difficult to detect and measure individual artefacts in coded images. A synthetic test image is developed to separate and measure edge blur and ringing artefacts due to image compression. The influence of pixel intensity gradient on the quality metrics is investigated, the...

avian populations is more than a century old (Greenwood 2009). In the first decades of bird ringing, the method was applied almost exclusively to answer questions about avian migration; how far do birds fly and which routes do they take? Beginning in the late 1960s, ornithologists began to monitor breeding population sizes using standardised mist netting (Robinson et al. 2009). Later the focus ...

The potentially broad application area in engineering design using Genetic Algorithm (GA) has been widely adopted by many researchers due to its high consistency and accuracy. Presented here is the initial design of a wideband non-dispersive wire bow-tie antenna using GA for breast cancer detection applications. The ultimate goal of this design is to achieve minimal late-time ringing but at hig...