What's the threshold between the AI input and my input that moves it from copyrightable to not? We can automate a lot of those things an artist did on a photo,

What's the threshold between the AI input and my input that moves it from copyrightable to not? We can automate a lot of those things an artist did on a photo, does that make it not copyrightable (that's a long word, let's use CR)). We kind of already have automated image-processing today, where does it change from cr to not-cr. I can take creative photos and then edit them and I can own the the copyright. If I took my photo and used automated improvement tools (like in google photo), I think it's still copyrightable. Now I take my automated outdoor camera at my house and take pictures of things, then I put them through google photos in my automated image pipeline, I guess they are copyrightable? Then I use those photos as input into a non-copyrightable-by-definition system like midjourney or whatever, now the output is not copyrightable. Seems pretty arbitrary. If an artist creates an artistic work (lets say it is a mirror of people), it's cr. If I as a software engineer create software, that software is cr. But the output of the cr is not cr?