| US 7,616,824 B2 | ||
| Method for spatially scalable video coding | ||
| Markus Flierl, Palo Alto, Calif. (US); and Pierre Vandergheynst, Pully (Switzerland) | ||
| Assigned to Ecole Polytechnique Fédérale de Lausanne (EPFL) CM - Ecublens, Lausanne (Switzerland) | ||
| Filed on Dec. 08, 2005, as Appl. No. 11/296,224. | ||
| Claims priority of provisional application 60/634114, filed on Dec. 08, 2004. | ||
| Prior Publication US 2006/0120614 A1, Jun. 08, 2006 | ||
| Int. Cl. G06K 9/36 (2006.01); H04N 7/12 (2006.01) | ||
| U.S. Cl. 382—240 [375/240.21] | 18 Claims |
| 1. A method for decomposing a digital image at resolution R and MR into a set of spatial sub-bands of resolution R and MR
where MR>R, the method comprising:
filtering and up-sampling the image at resolution R using one or more up-sampling filters;
calculating the high-band at resolution MR by subtracting the filtered and up-sampled image at resolution R from the image
at resolution MR;
filtering and down-sampling a spatial high-band using one or more down-sampling filters;
calculating a spatial low-band at resolution R by adding the filtered and down-sampled spatial high-band to the image at resolution
R; and
determining a rational factor for up-and down-sampling M based on a resolution ratio.
|