Depends, are these ladies clothed? If not, then yes. Even if they are clothed, what are your thoughts when looking at them?
As someone whose struggled with sexual addictions in the past, if your thoughts are not holy(if you're not sure, would it make you uncomfortable to have God watching over your shoulder, hearing your thoughts? If so, then that should be a pretty good indication right there) when you see these pictures, I suggest you take it seriously. Sexual immorality and lust not a problem that is limited to gender by any means. Attraction to and admiring the opposite gender itself isn't wrong, it is normal and healthy, but what we do with it can be. If we allow it to cause us to sin, even just in our hearts and minds, then we have a problem.
Matthew 5:28 But I say to you that everyone who looks at a woman with lustful intent has already committed adultery with her in his heart.
Psalm 119:9 How can a young man keep his way pure? By guarding it according to your word.