A Three-stage Approach for Segmenting Degraded Color Images: Smoothing, Lifting and Thresholding (SLaT)
Publication in refereed journal


摘要In this paper, we propose a SLaT (Smoothing, Lifting and Thresholding) method with three stages for multiphase segmentation of color images corrupted by dierent degradations: noise, information loss and blur. At the first stage, a convex variant of the Mumford-Shah model is applied to each channel to obtain a smooth image. We show that the model has unique solution under different degradations. In order to properly handle the color information, the second
stage is dimension lifting where we consider a new vector-valued image composed of the restored image and its transform in a secondary color space to provide additional information. This ensures that even if the first color space has highly correlated channels, we can still have enough information to give good segmentation results. In the last stage, we apply multichannel thresholding to the combined vector-valued image to nd the segmentation. The number of phases is only required in the last stage, so users can modify it without the need of solving the previous stages again. Experiments demonstrate that our SLaT method gives excellent results in terms of segmentation quality and CPU time in comparison with other state-of-the-art segmentation methods.
著者Xiaohao Cai, Raymond Chan, Mila Nikolova, Tieyong Zeng
期刊名稱Journal of Scientific Computing
出版社Springer Verlag (Germany)
頁次1313 - 1332
關鍵詞Mumford-Shah model, convex variational models, multiphase color image segmentation, color spaces

上次更新時間 2020-28-10 於 02:51