Subspace-Based Holistic Registration for Low-Resolution Facial Images


Boom, B.J. and Spreeuwers, L.J. and Veldhuis, R.N.J. (2010) Subspace-Based Holistic Registration for Low-Resolution Facial Images. EURASIP Journal on Advances in Signal Processing, 2010 . ISSN 1687-6172

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Abstract:Subspace-based holistic registration is introduced as an alternative to landmark-based face registration, which has a poor performance on low-resolution images, as obtained in camera surveillance applications. The proposed registration method finds the alignment by maximizing the similarity score between a probe and a gallery image. We use a novel probabilistic framework for both user-independent as well as user-specific face registration. The similarity is calculated using the probability that the face image is correctly aligned in a face subspace, but additionally we take the probability into account that the face is misaligned based on the residual error in the dimensions perpendicular to the face subspace. We perform extensive experiments on the FRGCv2 database to evaluate the impact that the face registration methods have on face recognition. Subspace-based holistic registration on low-resolution images can improve face recognition in comparison with landmark-based registration on high-resolution images. The performance of the tested face recognition methods after subspace-based holistic registration on a low-resolution version of the FRGC database is similar to that after manual registration.
Item Type:Article
Additional information:Open Access, Article ID 591412
Copyright:© 2010 The Author(s)
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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