Appeal No. 1998-1521
Application No. 08/584,990
particular, two-dimensional interpolation is employed so that
the light spot produced on the photoreceptor is adjustable
with subpixel precision in both the direction of the laser
beam sweep and the direction in which the photoreceptor is
rotated.
Claim 7 is reproduced as follows:
An image processing system for two dimensional
interpolation in a laser printer, comprising:
a photoreceptive surface;
a laser source having a modulatable intensity, the laser
source positioned to direct a laser light spot against the
photoreceptive surface;
an image data source for supplying a first raster and a
second raster of image data, with both the first raster and
the second raster of image data being a row of sample values;
a two dimensional interpolator connected to receive first
and second rasters of image data from the image data source
and determine both a resample value and associated two
dimensional slope information for the resample value, with the
resample value and associated two dimensional slope
information used to control modulation of the laser source and
its directed laser light spot, the two dimensional
interpolator using a first sample value, a second sample
value, a third sample value and a fourth sample value, with
the first sample value and the second sample value being
consecutive samples in the row of sample values from the first
raster, and with the third sample value and the fourth sample
value being consecutive samples in the row of sample values
from the second raster.
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