Stealing vs. Appropriation

Stealing is blatantly taking something that doesn't belong to you. Appropriation is using an idea that you take from a picture and using it as your own. Stealing and appropriation are both wrong, because taking an idea is the same as taking something blatantly, no one gave you permission for it. An idea belongs to someone else, so using it or changing it to use for yourself is wrong, and maybe stealing and appropriation are similar. ?