Journal of Mathematical Imaging and Vision

, Volume 25, Issue 3, pp 353–364

Edge-Forming Methods for Image Zooming

Article

Abstract

The article is concerned with edge-forming methods to be applied as a post-process for image zooming. Image zooming via standard interpolation methods often produces the so-called checkerboard effect, in particular, when the magnification factor is large. In order to remove the artifact and to form reliable edges, a nonlinear semi-discrete model and its numerical algorithm are suggested along with anisotropic edge-forming numerical schemes. The algorithm is analyzed for stability and choices of parameters. For image zooming by integer factors, a few iterations of the algorithm can form clear and sharp edges for gray-scale images. Various examples are presented to show effectiveness and efficiency of the newly-suggested edge-forming strategy.

Keywords

image zooming interpolation checkerboard effect edge-forming 

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Copyright information

© Springer Science + Business Media, LLC 2006

Authors and Affiliations

  1. 1.Department of Applied MathematicsSejong UniversitySeoulSouth Korea
  2. 2.Department of Mathematics and StatisticsMississippi State UniversityUSA

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