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In this contribution a novel scheme for reversible watermarking of digital images is presented. It is based on the histogram shifting embedding method applied to the image prediction error. A least square weight optimization criteria-based prediction scheme, is proposed for reducing the prediction error thus improving the embedding performances while… (More)
Gastric outlet obstruction in newborn may be due to segmental atresia or mucosal diaphragm. The authors report two cases of pyloric obstruction and they consider the etiopathogenetic and diagnostic aspects.