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Markov Chain Monte Carlo for Automated Face Image Analysis
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
 
ID 4219613
Author(s) Schönborn, Sandro; Egger, Bernhard; Morel-Forster, Andreas; Vetter, Thomas
Author(s) at UniBasel Vetter, Thomas
Year 2017
Title Markov Chain Monte Carlo for Automated Face Image Analysis
Journal International Journal of Computer Vision
Volume 123
Number 2
Pages / Article-Number 160-183
Abstract We present a novel fully probabilistic method to interpret a single face image with the 3D Morphable Model. The new method is based on Bayesian inference and makes use of unreliable image-based information. Rather than searching a single optimal solution, we infer the posterior distribution of the model parameters given the target image. The method is a stochastic sampling algorithm with a propose-and-verify architecture based on the Metropolis–Hastings algorithm. The stochastic method can robustly integrate unreliable information and therefore does not rely on feed-forward initialization. The integrative concept is based on two ideas, a separation of proposal moves and their verification with the model (Data-Driven Markov Chain Monte Carlo), and filtering with the Metropolis acceptance rule. It does not need gradients and is less prone to local optima than standard fitters. We also introduce a new collective likelihood which models the average difference between the model and the target image rather than individual pixel differences. The average value shows a natural tendency towards a normal distribution, even when the individual pixel-wise difference is not Gaussian. We employ the new fitting method to calculate posterior models of 3D face reconstructions from single real-world images. A direct application of the algorithm with the 3D Morphable Model leads us to a fully automatic face recognition system with competitive performance on the Multi-PIE database without any database adaptation.
Publisher Springer
ISSN/ISBN 0920-5691 ; 1573-1405
edoc-URL https://edoc.unibas.ch/59207/
Full Text on edoc Available
Digital Object Identifier DOI 10.1007/s11263-016-0967-5
ISI-Number WOS:000400868800002
Document type (ISI) Article
 
   

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