Assets in a plugin

I’m developing a theme plugin for my OJS 3.3 site. The footer includes images. Is it possible to include image assets in a plugin? If so, how do I determine the URL for them?

Nevermind. I answered the question as soon as I asked it. I was over complicating it in my mind.

The plugins directory is under the web server’s document root. Everything in it can be served to the browser.

So if I create an images directory, then the URL to those images would be based at /plugins/themes/my-theme/images/.