We present a simple method for assessing the quality of generated images in Generative Adversarial Networks (GANs). The method can be applied in any kind of GAN without interfering with the learning procedure or affecting the learning objective. The central idea is to define a likelihood function that correlates with the quality of the generated images. In particular, we derive a Gaussian likelihood function from the distribution of the embeddings (hidden activations) of the real images in the discriminator, and based on this, define two simple measures of how likely it is that the embeddings of generated images are from the distribution of the embeddings of the real images. This yields a simple measure of fitness for generated images, for all varieties of GANs. Empirical results on CIFAR-10 demonstrate a strong correlation between the proposed measures and the perceived quality of the generated images.

提出了一种简单的方法来评估生成对抗网络中生成的图像质量，通过定义与真实图像在鉴别器中的嵌入分布相关的高斯似然函数，并基于此定义两个简单的度量方式，从而得出一种适用于各种GAN的生成图像适应度的简单度量标准，CIFAR-10上的实证结果证明了提出的度量和生成图像的质量之间的强相关性。

生成对抗网络的可能性估计