An adaptive filter technique of image restoration in wavelet domain to reduce ringing artifacts

Cheng Yan; Xiangzhong Fang; Yutao Dong

doi:10.1117/12.631651

24 June 2005 An adaptive filter technique of image restoration in wavelet domain to reduce ringing artifacts

Cheng Yan, Xiangzhong Fang, Yutao Dong

Proceedings Volume 5960, Visual Communications and Image Processing 2005; 59603J (2005) https://doi.org/10.1117/12.631651
Event: Visual Communications and Image Processing 2005, 2005, Beijing, China

Abstract

The paper presents a simple and effective non-iterative method to reduce ringing artifacts of a restored image, which focuses on the artifacts both near the boundaries and close to the edges of the image. We introduce the power spectrum theory into wavelet domain and suppress the ringing artifacts in both the coarse and the fine scales separately. In low frequency subbands, we analyze the power spectrum of low frequency coefficients and calculate the peak regions that cause the ringing artifacts. After determining the peaks, we suppress them by a Center Weighted Median (CWM) filter from outside to inside layer-by-layer. In high frequency subbands, we use an adaptive filter to filter out residual ringing and preserve sharp edges and details. Experimental results demonstrate that our proposed post-filtering algorithm achieves better subjective and objective results compared with other methods. Also, it has very low complexity and high restoration speed.

Citation Download Citation

Cheng Yan, Xiangzhong Fang, and Yutao Dong "An adaptive filter technique of image restoration in wavelet domain to reduce ringing artifacts", Proc. SPIE 5960, Visual Communications and Image Processing 2005, 59603J (24 June 2005); https://doi.org/10.1117/12.631651

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available