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arXiv 2001.03653cs.LGstat.ML
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走向需要推广的GAN基准

Towards GAN Benchmarks Which Require Generalization

Google Brain(谷歌大脑)

Ishaan Gulrajani, Colin Raffel, Luke Metz

摘要:

对于通常用作无条件图像生成基准的许多评估指标,简单地记忆训练集可以获得比被认为是最先进的模型更好的分数;我们认为这是有问题的。我们澄清了一个评估指标不这样做的必要条件:估计函数必须需要模型的大样本。为了寻找这样一个度量,我们转向神经网络分歧(NND),它是根据训练来区分分布的神经网络定义的。由此产生的基准不能通过训练集记忆来“获胜”,同时仍然是感知相关的,并且只能从样本中计算。我们调查过去的工作,使用NND进行评估,并实现了一个例子黑盒指标的基础上,这些想法。通过实验验证,我们表明,它可以有效地衡量多样性,样本质量和泛化。

英文摘要:

For many evaluation metrics commonly used as benchmarks for unconditional image generation, trivially memorizing the training set attains a better score than models which are considered state-of-the-art; we consider this problematic. We clarify a necessary condition for an evaluation metric not to behave this way: estimating the function must require a large sample from the model. In search of such a metric, we turn to neural network divergences (NNDs), which are defined in terms of a neural network trained to distinguish between distributions. The resulting benchmarks cannot be "won" by training set memorization, while still being perceptually correlated and computable only from samples. We survey past work on using NNDs for evaluation and implement an example black-box metric based on these ideas. Through experimental validation we show that it can effectively measure diversity, sample quality, and generalization.

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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