Just Inappropriate
Sending a nude photo without being asked for it in an attempt to impress a woman is the least enticing thing a man can do. All you’re doing is showing that you have no sense of conversation skills that can help you get her attention. She’s probably going to feel like burning her phone now to erase the image from her mind.
An “accidental picture” is the worst way to go. It’s unbelievable and the unexpecting receiver will see that photo. Good luck clearing that one up.