Appeal No. 1997-4093
Application No. 08/115,209
The disclosed invention relates to a method for
determining the amount of light in each primary color for
copying colored originals on different types of film that
appear at a copying station to be copied.
Claim 1 is the only independent claim on appeal, and it
reads as follows:
1. In a photographic copying process in which colored
originals on different types of film appear at a copying
station to be copied, a method for determining the amount of
light in each primary color for copying such colored
originals, the color image of each original being scanned to
determine the density of the primary colors by region or by
point and the results of such density determination being used
to control the amounts of the copying light, wherein for each
scanned region a first difference is formed between the
density values of two primary colors and a second difference
is formed between the density values of one of these primary
colors and the third primary color and the average density is
formed from the density measurements of the three primary
colors, such that for each film to be copied a color density
difference curve relative to average density is produced,
which curve describes the color behavior of the film which
contains the original to be copied and supplies film-specific
values for producing copies of the film, said film-specific
values being used for the determination of the copying light
illumination for the colored original to be copied, the
improvement comprising forming color density difference curves
relative to average density for films of a specific type,
storing said last named color density difference curves, and,
when a film of said specific type appears at the copying
station containing a colored original to be copied, using
these stored color density difference curves to determine the
amount of light in each primary color for copying said colored
original.
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