Can you elaborate on the idea you're trying to express?
When you finally meet, you could say something like "You look completely different from how I imagined!"
Okay thank you.
But we can't say "I had a wrong image of you" Am I correct?
No, it is not correct. The word I can think of is "impression" but it is not exactly the same.
When you finally meet, you could say something like "You look completely different from how I imagined!"
No. We don't "imagine about someone/something". If that had been a correct suggestion, I would have used it in post #5.