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arXiv 1807.02602stat.ME
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基于有界新息传播表示的二维自回归过程的稳健估计

Robust Estimation for Two-Dimensional Autoregressive Processes Based on Bounded Innovation Propagation Representations

Grisel Maribel Britos, Silvia María Ojeda

摘要:

鲁棒方法是图像处理中处理污染和噪声的一种成功方法。本文提出了一种新的二维自回归模型的鲁棒估计方法。我们的方法,称为BMM-2D,依赖于表示一个二维自回归过程的辅助模型,以减弱污染(离群值)的影响。我们通过全面的蒙特卡罗模拟研究,考虑不同程度的替换污染和窗口大小,我们的方法与现有的鲁棒估计和最小二乘估计的性能进行比较。结果表明,新的估计是优于其他估计,无论是在准确度和精度。图像滤波的应用突出的调查结果,并说明了如何估计工程在实际应用中。

英文摘要:

Robust methods have been a successful approach to deal with contaminations and noises in image processing. In this paper, we introduce a new robust method for two-dimensional autoregressive models. Our method, called BMM-2D, relies on representing a two-dimensional autoregressive process with an auxiliary model to attenuate the effect of contamination (outliers). We compare the performance of our method with existing robust estimators and the least squares estimator via a comprehensive Monte Carlo simulation study which considers different levels of replacement contamination and window sizes. The results show that the new estimator is superior to the other estimators, both in accuracy and precision. An application to image filtering highlights the findings and illustrates how the estimator works in practical applications.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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