What did the physicists didn’t tell you about the diffusion models?
And this is the reason why diffusion models are so good at generating images.
When was is the last time you heard about diffusion in physics class?
Diffusion is a process of removing the sharp gradients. Over time, the process of diffusion creates entropy, it takes a system from the state of order to the state of disorder. But why?
Here is a simple animation of what diffusion means in physics.
Here is an example of how we can simulate a simple diffusion proces using particles.
The two examples may look different, but the first process describes the evolution of the diffusion process. While if we want to write down the profile instead of the particles themselves, the picture corresponds to the second one.