05384869 is referenced by 88 patents and cites 4 patents.

Image processing apparatus is described for filtering a digital representation of a raster scanned image into a plurality of sub-bands in the two-dimensional spatial frequency domain, the resolution of the raster scanned image in a first direction (usually the horizontal direction) being greater than the resolution of the raster scanned image in a second direction (usually the vertical direction). The image processing apparatus has a decimation filter means comprising a number of multi-tap digital decimation filters for spatial filtering in the first and second directions. The mean of the filter lengths of the filters used for filtering in the first direction is greater than that of the filters used for filtering in the second direction. Complementary interpolation apparatus for reconstructing the image from the plurality of sub-bands is also described.

Title
Image processing apparatus
Application Number
7/957159
Publication Number
5384869
Application Date
October 7, 1992
Publication Date
January 24, 1995
Inventor
Jonathan J Stone
Reading
GB
Jonathan M Soloff
Basingstoke
GB
Michael J Ludgate
Basingstoke
GB
James H Wilkinson
Tadley
GB
Agent
Alvin Sinderbrand
William S Frommer
Assignee
Sony United Kingdom
IPC
G06K 9/36
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