Abstract: A system model of markerless registration with line feature is presented. The complicated registration problem is divided into four steps: feature extraction, matching, 3D reconstruction, and merge of virtual and real scenes. Key techniques and theories in each step are discussed. Using the technique of structure from motion, AR markerless registration is achieved by 3D line tracking. Experimental results indicate that the proposed algorithm is effective.

Key words: augmented reality, 3D registration, line feature, structure from motion