Wang, Lingyu

Leedham, Graham

Cho, Siu-Yeung

2007

This paper presents a novel technique to derive the filter parameters for removing signal dependent noise (SDN) in the image. In order to remove SDN, many de-noising algorithms rely on a priori knowledge of noise parameters, especially the variance sigman², and the gamma value gamma of the specific imaging technique. This paper proposes a technique to automatically derive the signal variance sigmaf² and use this parameter to construct the 'Local Linear Minimum Mean Square Error' (LLMMSE) filter without the need to know the values of sigman² and gamma. Two image instances of the same noisy scene are used to calculate the signal variance which is then used to construct the LLMMSE filter. Experiments with both the "Lena" image and real-life far-infrared (FIR) vein pattern images showed that the proposed technique can predict the signal variance consistently, and the constructed LLMMSE filter performs well in removing the signal dependent noise.

Proceedings of the International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS 2007), p. 212-215

9781424414475

https://hdl.handle.net/1959.11/15150

Institute of Electrical and Electronics Engineers (IEEE)

Deriving filter parameters using dual-images for image de-noising

Conference Publication

Publication