Appeal No. 96-0992
Application 08/293,936
but rather to
the application of matrix algebra to solving colorimetric
calculations. To the extent that the Allen publication may
not be on all fours with the conversion step called for in the
present application, it nevertheless indicates to us that a
person skilled in the art would have understood that the
colorimetric and density data referred to in appellants’
specification are linearly related, or at least capable of
being reasonably approximated by assuming that they are
linearly related. See Allen, page 4, column 1, and page 5,
column 1. The Allen publication’s discussion on page 5 of
using partial derivatives to generate the elements of a
conversion matrix further indicates to us that the skilled
artisan would have understood how to go about deriving the
elements of the transformation matrix when informed by
appellants’ specification that the elements of the
transformation matrix may be empirically derived by taking the
partial derivatives of the color coordinates with respect to
the color density deviations.
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