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arXiv 1807.03027cs.CV
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基于条件随机场和混合高斯尺度的图像复原

Image Restoration Using Conditional Random Fields and Scale Mixtures of Gaussians

Milad Niknejad, Jose M. Bioucas-Dias, Mario A. T. Figueiredo

摘要:

提出了一种基于条件随机场(CRF)的内部分块图像复原的一般框架。与基于马尔可夫随机场(MRF)的相关模型不同,我们的方法明确地制定了整个图像的后验分布。潜在的功能被视为成比例的产品的可能性和每个补丁之前。通过假设相同的参数相似的补丁,我们的方法可以被归类为基于模型的非局部方法。对于CRF模型的势函数中的先验项,考虑了多变量高斯和多变量高斯尺度混合,后者是图像块的新先验。我们的研究结果表明,所提出的方法优于基于高斯混合模型的图像去噪方法和最先进的图像插值/修复方法。

英文摘要:

This paper proposes a general framework for internal patch-based image restoration based on Conditional Random Fields (CRF). Unlike related models based on Markov Random Fields (MRF), our approach explicitly formulates the posterior distribution for the entire image. The potential functions are taken as proportional to the product of a likelihood and prior for each patch. By assuming identical parameters for similar patches, our approach can be classified as a model-based non-local method. For the prior term in the potential function of the CRF model, multivariate Gaussians and multivariate scale-mixture of Gaussians are considered, with the latter being a novel prior for image patches. Our results show that the proposed approach outperforms methods based on Gaussian mixture models for image denoising and state-of-the-art methods for image interpolation/inpainting.

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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