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Modified edge-directed interpolation for images

[+] Author Affiliations
Wing-Shan Tam

The Hong Kong Polytechnic University, Department of Electronic and Information Engineering, Hung Hom, Kowloon, Hong Kong

Chi-Wah Kok

The Hong Kong Polytechnic University, Department of Electronic and Information Engineering, Hung Hom, Kowloon, Hong Kong

Wan-Chi Siu

The Hong Kong Polytechnic University, Department of Electronic and Information Engineering, Hung Hom, Kowloon, Hong Kong

J. Electron. Imaging. 19(1), 013011 (March 22, 2010). doi:10.1117/1.3358372
History: Received July 08, 2009; Revised December 25, 2009; Accepted January 25, 2010; Published March 22, 2010; Online March 22, 2010
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We present a modification of the new edge-directed interpolation method that eliminates the prediction error accumulation problem by adopting a modified training window structure, and extending the covariance matching into multiple directions to suppress the covariance mismatch problem. Simulation results show that the proposed method achieves remarkable subjective performance in preserving the edge smoothness and sharpness among other methods in the literaturé. It also demonstrates consistent objective performance among a variety of images.

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Citation

Wing-Shan Tam ; Chi-Wah Kok and Wan-Chi Siu
"Modified edge-directed interpolation for images", J. Electron. Imaging. 19(1), 013011 (March 22, 2010). ; http://dx.doi.org/10.1117/1.3358372


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