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The automatic construction of Active Appearance Models (AAMs) is usually posed as finding the location of the base mesh vertices in the input training images. In this paper, we repose the problem as an energy-minimizing image coding problem and propose an efficient gradient-descent algorithm to solve it.
Active Appearance Models, automatic construction, unsupervised learning, image coding, inverse compositional image alignment, quadratic smoothness priors.

I. Matthews, S. Baker and J. Schneider, "Automatic Construction of Active Appearance Models as an Image Coding Problem," in IEEE Transactions on Pattern Analysis & Machine Intelligence, vol. 26, no. , pp. 1380-1384, 2004.
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