Application of blind signal separation using simultaneous perturbation method - image signals separation

摘要

When independent plural signals are mixed and the mixed plural signals are measured, blind signal separation technique is very interesting approach to separate these signals only based on the measured signals. It is a hot subject in the fields of engineering, for example, communication engineering, signal processing, image processing, analysis of organs inside a body and so on [1],[2],[3]. In this paper, we propose a recursive method to obtain the separating matrix based on the mutual information, via the simultaneous perturbation optimization method [4],[5],[6]. The simultaneous perturbation method updates the separating matrix by using only two values of the mutual information. Some examples for image signals are shown to confirm viability of the proposed method. In these examples, our method separated some signals form mixed ones properly. This method is applicable to on-line separation because of simplicity of the algorithm