Unzip the contents into your ComfyUI\custom_nodes folder and restart ComfyUI and refresh your browser. The new node should show up under image in the UI. This node will take the provided image and combines a few of the other nodes I have to make it a single step process to make a contrast mask from it. This is a simple node that allows you to preview an image as it is being decoded. It does not save the image by design, but it does output it if one wanted to do so.