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 Science
, 1995
"... Symmetric extension is explored as a means for constructing nonexpansive reversible integertointeger (ITI) wavelet transforms for finitelength signals. Two families of reversible ITI wavelet transforms are introduced, and their constituent transforms are shown to be compatible with symmetric exte ..."
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Symmetric extension is explored as a means for constructing nonexpansive reversible integertointeger (ITI) wavelet transforms for finitelength signals. Two families of reversible ITI wavelet transforms are introduced, and their constituent transforms are shown to be compatible with symmetric extension. One of these families is then studied in detail, and several interesting results concerning its member transforms are presented. In addition, some new reversible ITI structures are derived that are useful in conjunction with techniques like symmetric extension. Lastly, the relationship between symmetric extension and perliftingstep extension is explored, and some new results are obtained in this regard.
Correspondence Reversible Integer Color Transform
"... Abstract—In this correspondence, we introduce a systematic algorithm that can convert any 3 3 color transform into a reversible integertointeger transform. We also discuss the ways to improve accuracy and reduce implementation complexity. We derive the integer RGBtoKLA, IV V, YC C, DCT, YUV, an ..."
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Abstract—In this correspondence, we introduce a systematic algorithm that can convert any 3 3 color transform into a reversible integertointeger transform. We also discuss the ways to improve accuracy and reduce implementation complexity. We derive the integer RGBtoKLA, IV V, YC C, DCT, YUV, and YIQ transforms that are optimal in accuracy. Index Terms—Color image processing, color transform, integer transform. I.
TimeFrequency Filtering with the STransform of ECG Signals
"... Abstract A key feature of the Stransform is that it uniquely combines a frequency dependent resolution of the timefrequency space and absolutely referenced local phase information. The Stransform is a timefrequency representation known for its local spectral phase properties. In this paper, a m ..."
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Abstract A key feature of the Stransform is that it uniquely combines a frequency dependent resolution of the timefrequency space and absolutely referenced local phase information. The Stransform is a timefrequency representation known for its local spectral phase properties. In this paper, a method to process nonstationary signal, such as electrocardiograms (ECG) based on Stransform, in which a filter is applied to a time frequency distribution instead of the Fourier spectrum. Such distribution is the Stransform, a modified shorttime Fourier transform whose window scales with frequency, as in wavelets.
Two families of symmetrypreserving reversible integertointeger wavelet transforms
 In Proc. of IEEE International Symposium on Circuits and Systems
, 2002
"... Two families of symmetrypreserving reversible integertointeger wavelet transforms are introduced. Briefly, we explain how transforms from these families can be used in conjunction with symmetric extension in order to handle signals of arbitrary length in a nonexpansive manner (which is often a de ..."
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Two families of symmetrypreserving reversible integertointeger wavelet transforms are introduced. Briefly, we explain how transforms from these families can be used in conjunction with symmetric extension in order to handle signals of arbitrary length in a nonexpansive manner (which is often a desirable attribute in signal coding applications). The characteristics of the two transform families and their constituent transforms are then studied. For the more constrained of the two families, we identify precisely which transforms belong to the family (by specifying properties and conditions for membership). Such results might be exploited in the filter bank design process in order to find new symmetrypreserving reversible integertointeger wavelet transforms for signal coding applications. 1.
SYMMETRYPRESERVING REVERSIBLE INTEGERTOINTEGER WAVELET TRANSFORMS
"... Studied are two liftingbased families of symmetrypreserving reversible integertointeger wavelet transforms. The transforms from both of these families are shown to be compatible with symmetric extension, which permits the treatment of arbitrary length signals in a nonexpansive manner. Throughout ..."
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Studied are two liftingbased families of symmetrypreserving reversible integertointeger wavelet transforms. The transforms from both of these families are shown to be compatible with symmetric extension, which permits the treatment of arbitrary length signals in a nonexpansive manner. Throughout this work, particularly close attention is paid to rounding functions, and the properties that they must possess in various instances. Symmetric extension is also shown to be equivalent to constant perliftingstep extension in certain circumstances. 1.
Preventing noncommunicable disease
"... The burden of noncommunicable disease (NCD) is a major global concern and is projected to increase by 15% over the next 10 years. NCD is the leading cause of mortality in Oman and other countries of the Gulf Cooperation Council (GCC). Some of the most successful interventions to address NCD includ ..."
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The burden of noncommunicable disease (NCD) is a major global concern and is projected to increase by 15% over the next 10 years. NCD is the leading cause of mortality in Oman and other countries of the Gulf Cooperation Council (GCC). Some of the most successful interventions to address NCD include legislations like banning smoking in public places. A desk review of available policies and legislations related to the behavioural risk factors of NCD from the GCC and from Oman was conducted with a focus on policies and legislations related to food, physical activity and tobacco. The review identified numerous documents; most were policies and resolutions related to tobacco control. Although only a few documents were laws, a majority were issued by nonhealth sectors. This policy review is the first effort in the GCC to consolidate information on the regulatory framework for the three key risk behaviours in the region, tobacco use, unhealthy diet and physical inactivity. Further work is needed to strengthen the regulatory framework, at both the national and regional levels, to strengthen tobacco control as well as to improve dietary patterns and physical activity levels. Given that a bulk of laws, regulations and policies are beyond the scope of the health sector, significant advocacy efforts are required to generate a multisectoral response. Key words: noncommunicable disease; health policy; Oman