Intensity inhomogeneity correction using modified homomorphic unsharp masking

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<p>Intensity inhomogeneity refers to the smooth intensity change inside the originally homogeneous regions. Filter-based inhomogeneity correction methods have been commonly used in literature. In this paper, a new filter-based inhomogeneity correction method is proposed based on fourth order complex diffusion. The effectiveness of the proposed method is compared with other filter-based Inhomogeneity correction methods. The results demonstrate that the proposed method outperforms the other methods in terms of coefficient of variation and coefficient of joint variation. Copyright © 2014 American Scientific Publishers All rights reserved.</p>