That is exactly right, don't over analyse the images. When they arise you just need to let them pass by, acknowledge them but don't pay much attention to them.

When you see people and objects in meditation it is your lack of attention that exhibits itself as various perceptions. In your case it was seeing but people hear things, feels things etc.

As you get more practice with meditation these will start to subside and you will be able to focus a lot better.

Cheers