2 March 2018 Multi-grid nonlocal techniques for x-ray scatter correction
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In this work, we used nonlocal priors in a Bayesian approach for X-ray scatter correction. The control parameters of our algorithms such as the patch sizes and search areas were set in such a way that significant improvement in correction results can be achieved. This, however, led to drastic increases in computation time. To solve this problem, we developed a novel multi-grid technique based on some observations on the matching process involved in the nonlocal priors. Experimental results have demonstrated that this technique is effective, accelerating the computation time significantly while maintaining the quality of correction results. In addition to scatter correction, it can also be used for other image processing applications where fast high-dimensional nonlocal filtering is needed.
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Yingying Gu, Yingying Gu, Jun Zhang, Jun Zhang, Ping Xue, Ping Xue, "Multi-grid nonlocal techniques for x-ray scatter correction", Proc. SPIE 10574, Medical Imaging 2018: Image Processing, 105741O (2 March 2018); doi: 10.1117/12.2293347; https://doi.org/10.1117/12.2293347

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