Patent ID: 7545997
Filing Date: 2009-06-09
Classification: H04N

Abstract:
1. A method comprising: dividing a first raster having a first resolution into a plurality of sub-sampling cells each including a 2×2 arrangement of neighboring pixels; and selecting a pixel from each of the sub-sampling cells in a periodic or quasi-periodic pattern biased toward selecting a pixel position within each sub-sampling cell that is distal from a selection position within at least one neighboring sub-sampling cell, the selected pixels defining a second raster having a second resolution lower than the first resolution, the selecting including selecting a pixel in one of the three positions of the 2×2 arrangement other than the selection position of the neighboring sub-sampling cell, the selection being biased toward the position diagonal from the selection position of the neighboring sub-sampling cell, wherein the above steps are performed by a raster image processor and a sub-sampler.