Journal of Mathematical Imaging and Vision

, Volume 25, Issue 3, pp 353–364

Edge-Forming Methods for Image Zooming

Authors

    • Department of Applied MathematicsSejong University
  • Seongjai Kim
    • Department of Mathematics and StatisticsMississippi State University
Article

DOI: 10.1007/s10851-006-7250-2

Cite this article as:
Cha, Y. & Kim, S. J Math Imaging Vis (2006) 25: 353. doi:10.1007/s10851-006-7250-2
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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 zoominginterpolationcheckerboard effectedge-forming
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© Springer Science + Business Media, LLC 2006