Smart-Rebinning for Compression of Concentric Mosaics

Concentric mosaics offer a quick solution to construct a virtual copy of a real environment, and navigate in the virtual environ-ment. However, the huge amount of data associated with concen-tric mosaics is a heavy burden for its application. A 3D wavelet transform-based compressor has been proposed in previous work to compress the concentric mosaics. In this paper, we greatly im-prove the performance of the 3D wavelet coder with a data rear-rangement mechanism called “smart rebinning”. The proposed scheme first aligns the concentric mosaic image shots along the horizontal direction and then rebins the shots into multi-perspective panoramas. Smart rebinning greatly improves the cross shot correlation and enables the coder to better explore the redundancy among shots. Experimental results show that the per-formance of the 3D wavelet coder improves an average of 4.3dB with the use of smart rebinning. The proposed coder outperforms MPEG-2 coding of concentric mosaics by an average of 3.7dB. mosaic scene can quickly be constructed. At the time of the ren-dering, we just split the rendered view into vertical ray slits, and reconstruct each slit through similar slits captured during the rotation of the camera.