People think that character perception is how the actors portray the character, but it's nothing to do with the actor/character relationship. It's a completely character/viewer relationship.
Here's an explanation that I gave to someone I tagged
Character perception is how the audience views the character from the beginning of the story to the end. Basically a 'first impressions are not always the correct impressions.' It's when a character is portrayed in a certain way and you think that's who they really are. Then as the story progresses you begin to see why they are that way and the first impressions view changes and you suddenly accept them as they have always been. It's not character development though, because the character never changes and they're the same person that they were in the beginning.
J.K. Rowling is the master of character perception as well as Jane Austen (Mr. Darcy as a classic example) and Suzanne Collins with Finnick Odair.
Hopefully this might clear some confusion.