Diffusion models: how they work
A diffusion model starts from random noise and removes it a little at a time until an image appears. This page explains how that works, and why it is both the strength and the cost of the approach. A diffusion model generates an image through an iterative denoising process. It begins with random noise and refines it over many steps into a coherent image (lines 36 to 37). The content that appears is not copied from...