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A practical approach to super-resolution

Publication ,  Journal Article
Farsiu, S; Elad, M; Milanfar, P
Published in: Proceedings of SPIE - The International Society for Optical Engineering
May 1, 2006

Theoretical and practical limitations usually constrain the achievable resolution of any imaging device. Super-Resolution (SR) methods are developed through the years to go beyond this limit by acquiring and fusing several low-resolution (LR) images of the same scene, producing a high-resolution (HR) image. The early works on SR, although occasionally mathematically optimal for particular models of data and noise, produced poor results when applied to real images. In this paper, we discuss two of the main issues related to designing a practical SR system, namely reconstruction accuracy and computational efficiency. Reconstruction accuracy refers to the problem of designing a robust SR method applicable to images from different imaging systems. We study a general framework for optimal reconstruction of images from grayscale, color, or color filtered (CFA) cameras. The performance of our proposed method is boosted by using powerful priors and is robust to both measurement (e.g. CCD read out noise) and system noise (e.g. motion estimation error). Noting that the motion estimation is often considered a bottleneck in terms of SR performance, we introduce the concept of "constrained motions" for enhancing the quality of super-resolved images. We show that using such constraints will enhance the quality of the motion estimation and therefore results in more accurate reconstruction of the HR images. We also justify some practical assumptions that greatly reduce the computational complexity and memory requirements of the proposed methods. We use efficient approximation of the Kalman Filter (KF) and adopt a dynamic point of view to the SR problem. Novel methods for addressing these issues are accompanied by experimental results on real data. © 2006 SPIE-IS&T.

Duke Scholars

Published In

Proceedings of SPIE - The International Society for Optical Engineering

DOI

ISSN

0277-786X

Publication Date

May 1, 2006

Volume

6077

Related Subject Headings

  • 5102 Atomic, molecular and optical physics
  • 4009 Electronics, sensors and digital hardware
  • 4006 Communications engineering
 

Citation

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Farsiu, S., Elad, M., & Milanfar, P. (2006). A practical approach to super-resolution. Proceedings of SPIE - The International Society for Optical Engineering, 6077. https://doi.org/10.1117/12.644391
Farsiu, S., M. Elad, and P. Milanfar. “A practical approach to super-resolution.” Proceedings of SPIE - The International Society for Optical Engineering 6077 (May 1, 2006). https://doi.org/10.1117/12.644391.
Farsiu S, Elad M, Milanfar P. A practical approach to super-resolution. Proceedings of SPIE - The International Society for Optical Engineering. 2006 May 1;6077.
Farsiu, S., et al. “A practical approach to super-resolution.” Proceedings of SPIE - The International Society for Optical Engineering, vol. 6077, May 2006. Scopus, doi:10.1117/12.644391.
Farsiu S, Elad M, Milanfar P. A practical approach to super-resolution. Proceedings of SPIE - The International Society for Optical Engineering. 2006 May 1;6077.

Published In

Proceedings of SPIE - The International Society for Optical Engineering

DOI

ISSN

0277-786X

Publication Date

May 1, 2006

Volume

6077

Related Subject Headings

  • 5102 Atomic, molecular and optical physics
  • 4009 Electronics, sensors and digital hardware
  • 4006 Communications engineering