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Energy shortage has seriously hindered the economic development in many countries. The energy conservation and waste heat recovery are paid more attention recently, especially in developing countries, where the energy utilization efficiency is often neglected for accelerating development before energy price is rapidly rising up. In china, the metallurgy(More)
We present an efficient compression method based on the hybrid wavelets and directional filter banks (HWD), to achieve high compression efficiency while keeping visually pleasing reconstruction quality for underwater images. According to the characteristics of underwater images and the human vision system (HVS), an improved just noticeable distortion (JND)(More)
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