Yes, so it follows in the second example if a person sees you clearly (with nothing obstructing his view), he obviously is able to also see you.
He clearly sees me can imply the meaning you are trying to put forth, but it doesn't have to.
The second one can also
He sees me clearly...so he should say hi.
Perhaps I will try to make it clearer to you. "Clearly, he sees me." means that it is clear to me that he sees me, not that he can see me clearly. Do you see the difference in nuance, here? "He sees me clearly." means that he sees me clearly. I do not know why this is true but it is. He clearly sees me could be interpreted either way depending on which word you emphasize. If you emphasize the word "clearly", it is as if you said "He, clearly, sees me." which means that it is obvious to me and perhaps to everyone that he sees me. So not only does he see me without obstruction, but anyone can notice that he sees me. It is quite a bit stronger. If he doesn't say hi, not only does he make a statement to me but to everyone. How embarrassing! You could emphasize the word "sees" to get the same meaning as "He sees me clearly." which is strictly about his vision and no one else is involved.
I have some doubts about this word. Can the word "duidelijk" be used in a context of doing something well? As a synonym of "goed"? For example: "He understands it well/clearly" - hij begrijpt het duidelijk? Is it correct? Will it also imply to different activities as reading, swimming and so on ("hij zwemt duidelijk"), or in these cases just the word "goed" should be used? Thanks :) !!