Filtering Algorithm for Removing Image Impulse Noise

Abstract:

The paper is devoted to put forward an effective algorithm for removing image impulse noise by improving the traditional median filter. The following approaches are developed in this paper. First, in a small area all the pixels are separated into signal pixels and suspicious noise pixels making use of the extremum and median filtering algorithm .Then suspicious noise pixels are further identified the signal pixels and noise pixels around pixels. If a pixel value is a noise pixel, it will be processed by median filter. A signal pixel will retain the original pixel value. The numerical experiments show that compared with traditional median filter , the details and edge information of the original image are retained when the new algorithm is used , Comparing with extremum median filter algorithm, the ratio of peak signal to noise can increase up to 2.94 at most. As a result, it is an effective algorithm for image denoising that can eliminate impulse noise in the image effectively.

• Periodical: Applied Mechanics and Materials (Volumes 543-547)
• Pages: 2817-2820
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.543-547.2817
• Online since: March 2014
• Authors: Li Hua Sun*, En Liang Zhao, Bao Yang Yu
• Keywords: Image De-Noising, Impulse Noise, Median Filtering

References

[1] Lee Y H, Kassam S A. Generalized median filtering and related nonlinear filtering techniques [J]. IEEE Trans Acoustics, Speech and Signal Processing, 1985, 33(3): 672-683.

DOI: 10.1109/tassp.1985.1164591

[2] Ko Sung Jea, Lee Yong Hoon. Center weighted median filters and their applicaticaxs to image enhancement[J]. IEEE Transactions on Circuits and Systems, 199l, 38(9): 984- 993.

DOI: 10.1109/31.83870

[3] Xu Chao, Chen Yihu. A switching median filter method based on detection of quadripartition noise points [J]. Computer Engineering and Design, 2008, 29(18): 4765-4767.

[4] Xing Cangju, Wang Shoujue, Deng Haojiang. A new filtering algorithm based on extremum and median value [J ] . Journal of Image and Graphics, 2001, 6 (6): 533-536.

[5] Peng Liangyu , Yang Hui , Huang Manchi. A new adaptive median filter algorithm based on detection of impulse noise points[J]. Journal of Lanzhou University of Science and Technology, 2009, 35(1): 77-80.