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Chunling Yang

Work place: School of Electronic and Information Engineering, South China University of Technology, Guangzhou, China

E-mail: eeclyang@scut.edu.cn

Website:

Research Interests: Image Compression, Image Manipulation, Image Processing

Biography

Chunling Yang (He’nan province, China, 1970) received the B.S. degree from Department of Electronic Engineering, Zhengzhou University, Zhengzhou, China, in 1991, the M.S. degree in 1996 and the Ph.D. degree in 1999, both from department of electronic engineering, Nanjing University of Science and Technology, Nanjing, China.
She is a professor at School of Electronic and Information Engineering, South China University of Technology (SCUT). Her research interests include image quality assessment and image/video compression. She has more than 40 publications in these fields.
Dr. Yang is an IEEE member.

Author Articles
32Still Image Compression Algorithm Based on Directional Filter Banks

By Chunling Yang Duanwu Cao Li Ma

DOI: https://doi.org/10.5815/ijitcs.2010.02.04, Pub. Date: 8 Dec. 2010

Hybrid wavelet and directional filter banks (HWD) is an effective multi-scale geometrical analysis method. Compared to wavelet transform, it can better capture the directional information of images. But the ringing artifact, which is caused by the coefficient quantization in transform domain, is the biggest drawback of image compression algorithms in HWD domain. In this paper, by researching on the relationship between directional decomposition and ringing artifact, an improved decomposition approach of HWD(IHWD) is roposed to reduce the ringing artifact. In addition, the IHWD algorithm and directional weighting model is applied into the JPEG2000 coding framework, and a new still magecompression algorithm IJPEG2000 is proposed. The experimental results show that IJPEG2000 has better performance than JPEG2000 whether on objective evaluation method or on subjective visual feeling.

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