Ideogram 4 Scheduler
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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