Smart Rebinning for Compression of Concentric Mosaics

摘要

Concentric mosaics offer a cquick solution to construct a virtual copy of a real environment, and navigate in the virtual environment. However, the huge amount of data associated with concentric mosaics is a heavy burden for its applkication. A 3D wavelet transform-based compressor has been proposed in previous work to compress the concentric mosaics. In this paper, we greatly improve the performance of the 3D wavelet coder with a data rear-rangement mechanism called "simart rebinning". The proposed scheme firxt aligns the concentric mosaic image shots along the horizontal direction and then rebins the shots into multiperspective panoramas. Smart rebinning greatly improves the cross short correlation and enables the coder to better expolore the reducdancy among short. Experimental results show that the performance of the 3D wavelet ocder improves an average of 4.3dB with the use of smart rebinning. The proposed coder outperorms MPEG-2 coding of concentric mosaics by an average of 3.7 dB.