Multidimensional Systems and Signal Processing

, Volume 20, Issue 4, pp 375–384 | Cite as

Superresolution reconstruction using nonlinear gradient-based regularization

  • Xin Zhang
  • Edmund Y. Lam


This paper discusses the problem of superresolution reconstruction. To preserve edges accurately and efficiently in the reconstruction, we propose a nonlinear gradient-based regularization that uses the gradient vector field of a preliminary high resolution image to configure a regularization matrix and compute the regularization parameters. Compared with other existing methods, it not only enhances the spatial resolution of the resulting images, but can also preserve edges and smooth noise to a greater extent. The advantages are shown in simulations and experiments with synthetic and real images.


Superresolution Inverse problem Image reconstruction 


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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  1. 1.Department of Electrical and Electronic EngineeringThe University of Hong KongKowloonHong Kong

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