Abstract

In order to preserve the integrity of edge and detail information in the underwater image, a NSCT de-noising method based on Non-local means with modified parameter is proposed. Since NSCT has the feature of translation invariance, it is used to decompose the underwater image in multi-scale and multi-direction. For the noise and detail information are normally distributed in the high frequency components, Non-local means method is applied to adjust the coefficients which are used as the feature vector of high frequency components. Meanwhile, the modified parameter is introduced in non-local means algorithm in order to enhance the flexibility. The experimental results demonstrate that the new underwater image de-noising algorithm achieves excellence performance.

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