It's better than not having any mental picture of them at all.

It seems to build up a mental picture of where and who they are in the world.

She suddenly had a mental picture of herself in her present state.

I looked over my last mental picture of the room.

I was trying to get a mental picture of what had happened.

To see if he looked anything like my mental picture of him.

Open your eyes, look around and take a mental picture.

I felt he might be taking a mental picture for future use.

It was one mental picture she could well live without.

I found myself taking a mental picture of him: blue eyes, dark hair.