Truncated Subband Coding of Images
Adelson, E. H. and Simoncelli, E. P.
United States Patent 4,817,182 (1989).
Image data is analyzed in a number of iterated analysis procedures, using two-dimensional quadrature mirror filters
to separate low-pass spatial filter response component and three differently oriented high-pass spatial filter
response components, which filter response components are decimated in both dimensions. The high-pass filter response
components are coded as is. The low-pass filter response component is coded as is only in the last iteration; in the
earlier analysis procedures the low-pass filter response component provides the input data for the secceeding