An image composition system includes an HMD (100) having a right-eye camera (110), a left-eye camera (111), a right-eye LCD (130) and a left-eye LCD (131) for displaying a real image, and the like, and an information processing apparatus (300) for generating another image different from the real image....http://www.google.com/patents/US20040056870?utm_source=gb-gplus-sharePatent US20040056870 - Image composition apparatus and method