Image Interpolation Using Phase-Shifted Wavelet Transforms

위상 보정된 웨이블릿 변환을 이용한 영상확대

  • Kim, Sang-Soo (Dept. of Electronic Engineering, Pusan National University) ;
  • Eom, Il-Kyu (Dept. of Info. & Comm. Engineering, Miryang National University) ;
  • Kim, Yoo-Shin (Dept. of Electronic Engineering, Pusan National University)
  • Published : 2005.11.26

Abstract

Parameter estimation for the probability model of wavelet coefficients is essential to the wavelet-domain interpolation. However, phase uncertainty, one well-known drawback of the orthogonal wavelet transforms, make it difficult to estimate parameters. In this paper, we exploit a phase shifting matrix in order to improve the accuracy of estimation. Nonlinear modeling to capture the interscale characteristics is also described. The experimental results show that the proposed method outperforms the previous wavelet-domain interpolation method as well as the conventional bicubic method.

Keywords