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  • Research Article
  • Open Access

Adaptive Markov Random Fields for Example-Based Super-resolution of Faces

EURASIP Journal on Advances in Signal Processing20062006:031062

https://doi.org/10.1155/ASP/2006/31062

  • Received: 21 December 2004
  • Accepted: 5 April 2005
  • Published:

Abstract

Image enhancement of low-resolution images can be done through methods such as interpolation, super-resolution using multiple video frames, and example-based super-resolution. Example-based super-resolution, in particular, is suited to images that have a strong prior (for those frameworks that work on only a single image, it is more like image restoration than traditional, multiframe super-resolution). For example, hallucination and Markov random field (MRF) methods use examples drawn from the same domain as the image being enhanced to determine what the missing high-frequency information is likely to be. We propose to use even stronger prior information by extending MRF-based super-resolution to use adaptive observation and transition functions, that is, to make these functions region-dependent. We show with face images how we can adapt the modeling for each image patch so as to improve the resolution.

Keywords

  • Information Technology
  • Quantum Information
  • Random Field
  • Transition Function
  • Prior Information

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Authors’ Affiliations

(1)
Electrical & Computer Engineering Department, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA 15213-3890, USA
(2)
ReallaeR, LLC, P.O. Box 549, Port Republic, MD 20676, USA

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