Is this a positive?

Cenko

Its CD 17 for me. I have irregular cycles. Can this be counted as a positive opk?

This is the same opk taken in two different lightings.

I did get more positive opk this afternoon. But i am thinking its because i had more concentrated urine than tonight? Can it be like that? This is my first time testing with these opks.

This is my afternoon opk from today.