Basically if you create it, it's an original. This is a work protected by copyright law. Actually the ambiguity of the definition was very much intentional on the part of Congress. Congress recognizes the following as works of authorship. Perception by humans is not even the specific requirement.
Machines qualify as perceivers, reproducer and communicators as well .
The moment you save your work to your hard-drive it becomes fixed. Courts have heard cases were even the works that exist on the RAM of your computer are argued to be fixed and therefore protected. You do not need to file an application for copyright protection or even place a notice of copyright on the work.