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arXiv 2103.15089cs.LGcs.CV
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一种改进的分布平滑自回归模型

Improved Autoregressive Modeling with Distribution Smoothing

Stanford University(斯坦福大学)

Chenlin Meng, Jiaming Song, Yang Song, Shengjia Zhao, Stefano Ermon

摘要:

虽然自回归模型在图像压缩方面表现出色,但它们的样本质量往往不足。虽然不现实,但根据模型,生成的图像通常具有很高的可能性,类似于对抗性示例的情况。受成功的对抗性防御方法的启发,我们将随机平滑引入自回归生成建模。我们首先对数据分布的平滑版本进行建模,然后反转平滑过程以恢复原始数据分布。这个过程大大提高了现有自回归模型在几个合成和真实世界的图像数据集上的样本质量,同时在合成数据集上获得有竞争力的似然性。

英文摘要:

While autoregressive models excel at image compression, their sample quality is often lacking. Although not realistic, generated images often have high likelihood according to the model, resembling the case of adversarial examples. Inspired by a successful adversarial defense method, we incorporate randomized smoothing into autoregressive generative modeling. We first model a smoothed version of the data distribution, and then reverse the smoothing process to recover the original data distribution. This procedure drastically improves the sample quality of existing autoregressive models on several synthetic and real-world image datasets while obtaining competitive likelihoods on synthetic datasets.

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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