Ideogram4Scheduler - ComfyUI Built-in Node Documentation

The Ideogram 4 Scheduler node generates a sequence of sigma values (noise levels) for the diffusion sampling process, based on the Ideogram 4 reference schedule. It creates a custom noise schedule that adapts to the image dimensions and allows fine-tuning through statistical parameters.

Inputs

Parameter	Description	Data Type	Required	Range
`steps`	The number of sampling steps to generate the schedule for (default: 20)	INT	Yes	1 to 200
`width`	The width of the image in pixels (default: 1024)	INT	Yes	256 to 8192 (step: 16)
`height`	The height of the image in pixels (default: 1024)	INT	Yes	256 to 8192 (step: 16)
`mu`	The mean parameter for the logit-normal distribution, controlling the central noise level (default: 0.0)	FLOAT	Yes	-10.0 to 10.0 (step: 0.05)
`std`	The standard deviation parameter for the logit-normal distribution, controlling the spread of noise levels (default: 1.75)	FLOAT	Yes	0.1 to 5.0 (step: 0.05)

Outputs

Output Name	Description	Data Type
`SIGMAS`	A tensor of sigma values representing the noise schedule, with length equal to `steps + 1`. The values descend from high noise to low noise, with the final value set to 0.0 for complete denoising.	SIGMAS

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​Inputs

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Inputs

Outputs