Arnaud Jacquin

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The work reported in this paper addresses the issue of automatically tracking the faces and facial features of persons in head-and-shoulders video sequences. We propose two totally automatic algorithms which respectively perform the detection of head outlines and identify rectangular \eyes-nose-mouth" regions, both from downsampled binary thresholded edge(More)
Chaotic dynamics can be used to model shapes and render textures in digital images. This paper addresses the problem of how to model geometrically shapes and textures of two dimensional images using iterated function systems. The successful solution to this problem is demonstrated by the production and processing of synthetic images encoded from color(More)
Traditional wavelet packet (WP) optimization techniques neglect information about the structure of the lossy part of the compression scheme. Such information, however, can help guide the optimization procedure so as to result in efficient WP structures. We propose a wavelet packet algorithm with a constrained Rate-Distortion optimization which makes it(More)