[OPTICAL REVIEW Vol. 17, No. 5 (2010) 447-453]
© 2010 The Japan Society of Applied Physics

Image Enlargement with High-Frequency Component Augmentation Based on Predefined Codebook Describing Edge Blurring Properties

Hideaki KAWANO*, Hakaru TAMUKOH1, Noriaki SUETAKE2, Byungki CHA3, and Takashi ASO3

Faculty of Engineering, Kyushu Institute of Technology, 1-1 Sensuicho, Tobata-ku, Kitakyushu 804-8550, Japan
1Institute of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan
2Graduate School of Science and Engineering, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8512, Japan
3Faculty of Management and Information Sciences, Kyushu Institute of Information Sciences, 6-3-1 Saifu, Dazaifu, Fukuoka 818-0117, Japan

(Received January 27, 2010; Accepted June 17, 2010)

Image super-resolution as high-quality image enlargement is achieved by some type of restoration for high-frequency components that deteriorate through the image enlargement. The estimation methods using the given image itself are effective for the restoration, and we have proposed a method employing the codebook describing edge blurring properties that are derived from the given image. It is, however, unfavourable to apply those image-dependent methods to movies whose scene varies momentarily. In this paper, an image-independent codebook incorporating local edge patterns of images is proposed, and then the predefined codebook is applied. The effectiveness is shown through some experiments.

Key words: image enlargement, super-resolution, codebook, edge pattern, image patch

*E-mail address: kawano@ecs.kyutech.ac.jp