Fréchet inception distance

The Fréchet inception distance (FID) is a metric used to assess the quality of images created by a generative model, like a generative adversarial network (GAN) or a diffusion model. The FID compares the distribution of generated images with the distribution of a set of real images (a "ground truth" set).

Source: Wikipedia — Fréchet inception distance (CC BY-SA 4.0)