Appeal No. 2001-1337
Application No. 08/864,944
converting luminance data (Y) of the multi-bit per pixel raster
image to binary data per pixel and identifying a working pixel
from the binary data taught by applicant’s admitted prior
art, . . . .”
Appellants argue (brief at page 6) that
there is no teaching or suggestion as to modifying the
luminance component. Nor is there any teaching or
suggestion as to what color space is applicable for
implementation. This is critical because simply
modifying any color component in any color space
presents significant color problems in the resultant
output image. For example, if the pixel data is in an
RGB color space, and only one of these color components
is modified (i.e., either R, G or B), incorrect hue
shifts inevitably occur in the resultant output image.
Appellants further argue (id. at page 8) that
[a]pplicants acknowledge that thresholding procedure 46
[figure 2 of disclosure] alone is known in the art,
however, its applicability to thresholding a pure
luminance only component (Y)44 as described and claimed
in this invention is not taught or even suggested in
Applicants’ Specification as admitted prior art, nor is
it taught or suggest[ed] in any of the cited art, alone
or in combination.
The Examiner responds (answer at page 9) that “Mutz teaches
[that] brightness of multi-bit raster image is converted to
binary rendering (2 levels)(col. 1, lines 16-17), the brightness
in here is a pure luminance or a Y component in luminance
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