Denoise

How much of the starting picture the sampler redraws.

#In plain words

denoise is a number from 0 to 1 on the sampler. It says how much noise is laid over the starting latent before sampling, and so how much of it the model redraws.

• 1.0: start from pure noise. Whatever was in the latent is gone. This is text to image.
• 0.5: half-way. The composition and colours of the start stay; texture, faces and detail are redrawn.
• 0.2: only fine detail changes.

With denoise below 1, the sampler runs only the last part of the schedule: at 20 steps and 0.5 it does roughly the last 10.

#Where you meet it in a graph

• denoise on KSampler, BasicScheduler and other nodes. KSampler (Advanced) has no denoise; there the same effect comes from start_at_step.
• It matters when latent_image holds a real picture: from VAE Encode (image to image), from an earlier sampler (hires fix, refining), or with a mask (inpainting).

#Values people use

#Typical mistakes

• denoise below 1 on an empty latent: there is nothing to keep, and the picture comes out muddy and unfinished.
• denoise 1 in image to image: the start picture is ignored.
• Too low to change anything, or too high to keep anything: compare two values side by side.

#How the app helps

The refining lesson checks denoise of the second sampler between 0.2 and 0.5. The KSampler description warns about denoise below 1 on an empty latent. In Properties, a field with a built-in note has a button What this field does next to its name; it opens the note under the field: what the field does and what to put in it.

#See also

• Image to image
• Inpainting and masks
• Upscaling
• Lesson: Refining with a second model