> For the complete documentation index, see [llms.txt](https://docs.lightact.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.lightact.com/layers-and-layouts/layer-layouts/nodes/computer-vision/subtract.md).
# Subtract
## Subtract
To subtract two CV inputs, you can use the **Subtract** node. Once you feed it two CV inputs, the Subtract node will produce a single output, inheriting the resolution of the first CV input.
## Node properties
In its node properties, Subtract node gives you the option to output the absolute value of the subtracted images to the Output node pin.