Appeal No. 2001-1337
Application No. 08/864,944
aliasing effect is achieved relative to the raster image. The
luminance component of the raster image data is converted to a
binary format to identify the working pixel using template
matching. Luminance data of the working pixel is modified by
utilizing luminance data of adjacent pixels to produce a new
luminance value which is then assigned to the working pixel. In
the event chroma data is associated with the object, the chroma
data is combined with the modified luminance data and also
assigned to the working pixel. Importantly, the present
invention enables a multi-bit per pixel color imaging device to
anti-alias a raster image using a luminance chrominance color
space and binary template matching.
The following claim further illustrates the invention.
12. A method of anti-aliasing an edge of an object in
a raster image, the raster image being represented by multi-bit
per pixel data, the method comprising the steps of:
(a) thresholding a pure luminance only component of the
multi-bit per pixel data to obtain a copy representation of the
raster image in a binary data format;
(b) identifying a working pixel in the binary data for
anti-aliasing with respect to the edge of the object;
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