As far as I know, anything like that involves darkness combined with speed although it's been a long time since I've read a Batman comic.
I think this was hashed out a long time ago. In fact, I think I asked how fast someone would have to move to be invisible and I think Sharp answered the question. Of course, it depends on how far away the person is and so on but so fast that Batman isn't even close to being that fast. Again, under cover of darkness is another matter.