What's the number-one problem with conventional posters? If it's a poster of an idol you want to kiss, there's no way for her to kiss you back. At least, that's the biggest problem for one team of researchers at Japan's Keio University. They've developed technology that allows for images to react to people's movements. When you lean in for a smooch, so does the subject.

The secret is an ultrasound sensor that detects your head's distance from the image. If you're farther away, the girl will just blush, and as you get closer, she moves in for the kiss. It's only visual for now, but the team speculates that they could also include other sensory feedback, such as the girl's shampoo fragrance, a lemon lipstick flavor, or a speaker that says "I love you."

The team wants to get idols to pose for this tech and sell it as an application or maybe as a sign advertising something, maybe having the idol blow a kiss to potential customers passing by. An iPad app is still a ways away from having a moving poster in your room, but still, think of the possibilities! If they work on implementing this tech in inexpensive displays, we could use science to make all those magic moving pictures from Harry Potter into a reality! Until then, we have a video of the prototype after the jump.

[Via Akihabara News]