Sergio Carrato

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Temporal video segmentation is the "rst step towards automatic annotation of digital video for browsing and retrieval. This article gives an overview of existing techniques for video segmentation that operate on both uncompressed and compressed video stream. The performance, relative merits and limitations of each of the approaches are comprehensively(More)
3-D RATIONAL FILTER FOR EDGE PRESERVING SMOOTHING Francesco Cocchia, Sergio Carrato, and Giovanni Ramponi D.E.E.I., University of Trieste, via Valerio, 10, 34100 Trieste, Italy tel.: +39.40.6767147; fax: +39.40.6763460 ABSTRACT | A nonlinear spatio-temporal lter capable of signi cantly attenuating noise in image sequences without corrupting image details is(More)
A novel noise reduction system for video sequences is presented. It is based on a simple and accurate estimation algorithm, which is used to enable a 4lter in a suitable set of rational and median operators. The system, which has been implemented in real time for common intermediate format images on a commercial multimedia digital signal processor, has been(More)
A novel irregular and nonuniform sampling scheme for image data is presented in this paper. Its main characteristics are the particular distribution of the samples along image edges and in textured areas, which is obtained following a multiresolution approach, and the low computational complexity. As an example of application, an image coding system is(More)
Regular moderate-intensity exercise is strongly recommended for its beneficial effects in all people. In patients with type 1 diabetes, however, the exercise-associated glycemic imbalances remain an unresolved clinical challenge. Current guidelines require an in-depth understanding of the glycemic responses to exercise and each patient has to discover, by(More)
CMOS video cameras with high dynamic range (HDR) output are particularly suitable for driving assistance applications, where lighting conditions can strongly vary, going from direct sunlight to dark areas in tunnels. However, common visualization devices can only handle a low dynamic range, and thus a dynamic range reduction is needed. Many algorithms have(More)
An approach for video segmentation into shots and sub-shots that works directly in the MPEG compressed domain is presented. It is based only on the information about macroblock coding mode and motion vectors in P and B frames. The system follows a two-pass scheme and has a hybrid rule-based/neural structure. A rough scan over the P frames locates the(More)