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The need for information access and processing in mobile computing environments presents great challenges to database researchers. Apart from advances in wireless communications and device technology, new data management techniques are needed to provide a transparent interaction between fixed and mobile devices in global information systems. A key aspect is(More)
As the motion of the heart is a 3D phenomenon, its evaluation from sequences of 2D images causes a great loss of information on the motion itself. Our aim is therefore to process real 3D echocardiographic images and to carry out an automatic way of evaluating the movements of the cardiac structures. To estimate the optical flow, a mathematical model based(More)
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