arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.07923cs.CVeess.IV
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基于生成模型的图像去Quantization

Image De-Quantization Using Generative Models as Priors

Rutgers University(罗格斯大学);University of Patras(帕特雷大学)

Kalliopi Basioti, George V. Moustakides

摘要:

图像量化被用于几个应用中,旨在减少图像中可用颜色的数量,从而减少其大小。反量化是指对量化效果进行反量化,恢复原始的多色彩层次图像。现有技术通过对理想图像施加合适的约束来实现去量化,以便使恢复问题可行,因为它否则是不适定的。我们在这项工作中的目标是通过严格的数学分析,这是基于经典的统计估计理论,开发一个去量化机制。在这项工作中,我们将生成建模的理想图像作为一个合适的先验信息。所得到的技术是简单的,能够成功地去量化图像,经历了严重的量化效应。有趣的是,我们的方法可以恢复图像,即使量化过程并不完全知道,并包含未知的参数。

英文摘要:

Image quantization is used in several applications aiming in reducing the number of available colors in an image and therefore its size. De-quantization is the task of reversing the quantization effect and recovering the original multi-chromatic level image. Existing techniques achieve de-quantization by imposing suitable constraints on the ideal image in order to make the recovery problem feasible since it is otherwise ill-posed. Our goal in this work is to develop a de-quantization mechanism through a rigorous mathematical analysis which is based on the classical statistical estimation theory. In this effort we incorporate generative modeling of the ideal image as a suitable prior information. The resulting technique is simple and capable of de-quantizing successfully images that have experienced severe quantization effects. Interestingly, our method can recover images even if the quantization process is not exactly known and contains unknown parameters.

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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