Non-stationary Noise Estimation Based on Non-negative Matrix Factorization
نویسندگان
چکیده
In this paper, we apply a non-negative matrix factorization (NMF) technique to propose a method of estimating noise occurring in non-stationary environments. In the proposed method, the basis matrix of the target noise is first obtained via NMF training. The noise basis is then applied to estimate an activation matrix of the target noise from the noisy signal. The proposed method is finally applied to reduce the auto-focus (AF) noise in a digital camera. It is shown from the experiment that the proposed method provides a better estimate of the AF noise than a conventional method based on signal-presence probability.
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