DPM samplers

Diffusion Probabilistic Model Solvers (DPM-Solvers) belong to a family of newly developed solvers for diffusion models. They are the following solvers in NovArch AI.

• DPM2

• DPM2 Karras

• DPM2 a

• DPM2 a Karras

• DPM Fast

• DPM adaptive

• DPM Karras

DPM2 is the DPM-Solver-2 (Algorithm 1) of the DPM-Solver article. The solver is accurate up to the second order.

DPM2 Karras is identical to DPM2 except for using the Karras noise scheduler.

DPM2 a is almost identical to DPM2, except noise is added to each sampling step. This makes it an ancestral sampler.

DPM2 a Karras is almost identical to DPM2 a, except for using the Karras noise schedule.

DPM Fast is a variant of the DPM solver with a uniform noise schedule. It is accurate up to the first order. So it is twice as fast as DPM2.

DPM adaptive is a first-order DPM solver with an adaptive noise schedule. It ignores the number of steps you set and adaptively determines its own.

DPM++ samplers are the improved versions of DPM.