Left Toolbar > Convert Nodes > To LAB
The To LAB node converts the input image into a LAB image.
input
Img in RGB color space
output
Img in LAB color space
On the left toolbar choose Convert Nodes > LAB. >
Drag the To LAB icon into the Node Graph.
Connect the output of an image node into the Img input in the To LAB node.
Img
The Image to convert to LAB color mode.
Img
The LAB image.
Keep Alpha
If checked, the alpha channel of the input image is passed to the output image. Generates an image of LABA color mode.