Diamond-shaped passband filters with a cascade structure for subband coding
Jan De Lameillieure, Günter Schamel · International Conference on Image Processing · 1992
The subband coding with diamond-shaped passband filters and quincunx subsampling requires nonseparable filters. The contribution presents a new type of filter bank with a cascade structure. It gives a perfect reconstruction just like the other filter banks with a cascade structure presented in Vetterli, et al. (1990). On top of that, the filter bank is symmetrical with respect to the main axes (axis f/sub x/=0 and axis f/sub y/=0) and to the main diagonal axes (f/sub x/=+or-f/sub y/), which is not the case for the filter types presented in Vetterli et al. (1990). >