Regular Articles

Corner shock filtering and regularized image magnification

[+] Author Affiliations
Wen-Ze Shao

Nanjing University of Science and Technology, School of Computer Science and Technology, 210094, Nanjing, Jiangsu Province, China

Zhi-Hui Wei

Nanjing University of Science and Technology, School of Computer Science and Technology, 210094, Nanjing, Jiangsu Province, China

J. Electron. Imaging. 17(1), 013014 (April 02, 2008). doi:10.1117/1.2898114
History: Received November 09, 2006; Revised July 21, 2007; Accepted July 24, 2007; Published April 02, 2008
Text Size: A A A

Many magnification algorithms have been proposed in past decades, most of which concentrate on the smooth reconstruction of edge structures. Edge reconstruction, however, can destroy corners, thus producing perceptually unpleasant rounded corner structures. In this work, corner shock filtering is designated for enhancing corners relative to the known edge shock filtering, based on a new measure of corner strength and the theory of level-sets motion under curvature. By combining directional diffusion, edge shock filtering, and corner shock filtering, a regularized partial differential equation (PDE) approach for magnification is proposed to simultaneously reconstruct the edges and preserve the corners. Moreover, the proposed PDE approach is also robust to random noises. Experimental results in both cases of grayscale and color images confirm the effectiveness of our approach.

Figures in this Article
© 2008 SPIE and IS&T

Citation

Wen-Ze Shao and Zhi-Hui Wei
"Corner shock filtering and regularized image magnification", J. Electron. Imaging. 17(1), 013014 (April 02, 2008). ; http://dx.doi.org/10.1117/1.2898114


Tables

Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

PubMed Articles
Advertisement
  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.