Extract RGB channel or luminance as grayscale image and mask — ComfyUI node from RC Image Compositor. Run it in the cloud, no install required.

A comprehensive ComfyUI plugin suite that brings professional Photoshop-style layer effects and advanced compositing capabilities. Features modular architecture, 24 blend modes, and enhanced positioning system.

RC Image Compositor

image

channel

invert

Extract RGB channel or luminance as grayscale image and mask

Name	Type	Default	Description
image	IMAGE		—
channel	COMBO	green	Channel to extract: - red: Red channel - green: Green channel (often best for green screen) - blue: Blue channel - alpha: Alpha channel (if available) - luminance: Luminance (0.299R + 0.587G + 0.114*B)
invert	BOOLEAN	false	Invert the extracted channel

Name	Type	Description
IMAGE	IMAGE	—
MASK	MASK	—

RC Channel Extractor

Inputs (3)

Outputs (2)