Research of EMCCD image filtering method based on noise detection and fuzzy adaptive median filter

Lei Qi; Wenwen Zhang; Qian Chen; Guohua Gu; Yuehong Qian

doi:10.1117/12.2034176

19 December 2013 Research of EMCCD image filtering method based on noise detection and fuzzy adaptive median filter

Lei Qi, Wenwen Zhang, Qian Chen, Guohua Gu, Yuehong Qian

Proceedings Volume 9045, 2013 International Conference on Optical Instruments and Technology: Optoelectronic Imaging and Processing Technology; 904511 (2013) https://doi.org/10.1117/12.2034176
Event: International Conference on Optical Instruments and Technology (OIT2013), 2013, Beijing, China

Abstract

Traditional median filtering algorithm is mainly designed for stationary noise density, which realizes the image smooth but leads to edge fuzzy. The noise density of Electron Multiplying CCD (EMCCD) image varies with the gain. In this paper, a new noise detection and fuzzy adaptive median filter (NDFAMF) is proposed to overcome such drawbacks. First, the noise pixels in the center of the filter window were identified. Secondly, the thresholds were introduced for the detected “noise points”. Based on the thresholds and median of the filtering window, the fuzzy membership function of noise points was put forward, using the fuzzy membership function to filter the noise points. Finally, according to the density of noise in the filtering window the filtering window can change the size adaptive. Simulation and experimental results show that the new algorithm is able to remove noise pixels effectively and protect the details well in the image. The performance is better than the other median filters under the condition of low noise density and relatively stable under the condition of high noise density.

Citation Download Citation

Lei Qi, Wenwen Zhang, Qian Chen, Guohua Gu, and Yuehong Qian "Research of EMCCD image filtering method based on noise detection and fuzzy adaptive median filter", Proc. SPIE 9045, 2013 International Conference on Optical Instruments and Technology: Optoelectronic Imaging and Processing Technology, 904511 (19 December 2013); https://doi.org/10.1117/12.2034176

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