Hallucinating faces: LPH super-resolution and neighbor reconstruction for residue compensation

Authors:
Yueting Zhuang;Jian Zhang;Fei Wu
Affiliations:
College of Computer Science and Technology, Zhejiang University, Hangzhou 310027, PR China;College of Computer Science and Technology, Zhejiang University, Hangzhou 310027, PR China;College of Computer Science and Technology, Zhejiang University, Hangzhou 310027, PR China
Venue:
Pattern Recognition
Year:
2007

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Abstract

A two-phase face hallucination approach is proposed in this paper to infer high-resolution face image from the low-resolution observation based on a set of training image pairs. The proposed locality preserving hallucination (LPH) algorithm combines locality preserving projection (LPP) and radial basis function (RBF) regression together to hallucinate the global high-resolution face. Furthermore, in order to compensate the inferred global face with detailed inartificial facial features, the neighbor reconstruction based face residue hallucination is used. Compared with existing approaches, the proposed LPH algorithm can generate global face more similar to the ground truth face efficiently, moreover, the patch structure and search strategy carefully designed for the neighbor reconstruction algorithm greatly reduce the computational complexity without diminishing the quality of high-resolution face detail. The details of synthetic high-resolution face are further improved by a global linear smoother. Experiments indicate that our approach can synthesize distinct high-resolution faces with various facial appearances such as facial expressions, eyeglasses efficiently.