Guidance in diffusion models is best understood as approximating an intractable joint-scaling optimum, and the proposed REG correction improves this approximation in practice.
Remarks on Score Function Formula We will illustrate the score function formula for the unconditional generation case, corresponding to the second line of Eq
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REG: Rectified Gradient Guidance for Conditional Diffusion Models
Guidance in diffusion models is best understood as approximating an intractable joint-scaling optimum, and the proposed REG correction improves this approximation in practice.