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The endocardium tracking in ultrasound images is challenging due to large shape variations and the signal dropout. In this paper, we present a method to fuse multiple information sources to robustly track the endocardium. The first novelty of the method is to perform tracking in a straightened shape space, to minimize the image pattern changes caused by cardiac motions. Straightened images are used...
A feature-based robust watermarking algorithm against geometric transformation is proposed in this paper. As salient features in the image are relatively stable under geometric transformation, they may serve as reference points to synchronize the processes of watermark embedding and detection. To further increase the repeatability of feature detection, a novel feature enhancement technique is proposed...
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