AdjustContrast - ComfyUI Built-in Node Documentation - ComfyUI

The Adjust Contrast node adjusts the contrast of an input image by scaling the difference between light and dark areas around the midpoint of the color range. A factor of 1.0 leaves the image unchanged, values below 1.0 reduce contrast, and values above 1.0 increase contrast.

Inputs

Parameter	Description	Data Type	Required	Range
`image`	The input image to have its contrast adjusted.	IMAGE	Yes	-
`factor`	Contrast factor. 1.0 = no change, <1.0 = less contrast, >1.0 = more contrast. (default: 1.0)	FLOAT	No	0.0 - 2.0

Outputs

Output Name	Description	Data Type
`image`	The resulting image with adjusted contrast. Pixel values are clamped to the 0.0–1.0 range. If the input image has an alpha channel, that channel is preserved unchanged.	IMAGE

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