Lapped multiple bases realizations for the transform coding of still images
Victor DeBrunner, Lixiang Chen, Hongjian Li · 2002
We describe a system for still image compression which uses several lapped orthogonal transform (LOT) sets in a multiple bases realization algorithm, the recursive residual projection (RRP) algorithm. Newly developed RRP algorithms are shown to reduce the number of encoded transform coefficients 20% beyond the DCT-only compression standard, JPEG. These algorithms still suffer from the problem of block-discontinuities at the boundaries of the segmented image. We extend these algorithms to use several newly developed LOT bases. Fast hardware implementations of these algorithms are presented.>