Constrained Unsharp Masking for Image Enhancement

  • Radu Ciprian Bilcu
  • Markku Vehvilainen
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5099)


In this paper we present a cost-effective solution for combined de-noising and sharpening of digital images. Our method combines the unsharp masking and sigma filtering techniques through a regularization mechanism thus ensuring effective noise reduction and edge enhancement in the processed image. We describe our method in detail and we analyze the proposed implementation through extensive experiments done in various scenarios. Due to its low computational complexity the proposed method is well suited for mobile implementations.


Image sharpening de-noising unsharp masking 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  • Radu Ciprian Bilcu
    • 1
  • Markku Vehvilainen
    • 1
  1. 1.Nokia Research CenterTampereFinland

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