Appeal No. 95-5109
Application No. 08/063,665
auto-focus measurement values using the techniques of the
first and second embodiments before “determining, in response
to a change in both said first and second auto-focus
measurement values, that an auto-focus operation should be
performed” (specification, pages 21 through 24; Figure 15).
Claim 1 is illustrative of the claimed invention, and it
reads as follows:
1. An apparatus for generating an auto-focus measurement
value to be used in performing an auto-focus operation on the
basis of contrast components of a field of a video signal,
comprising:
line peak means for sequentially receiving lines within
said field of said video signal and generating respective
maximum values of contrast components of said received lines
within said field of said video signal;
average means for sequentially averaging said maximum
values generated by said line peak means over predetermined
groups of said lines within said field of said video signal to
form a plurality of average values for said field; and
peak hold means for outputting as said auto-focus
measurement value for said field of said video signal a
maximum value of said plurality of average values formed by
said average means.
The references relied on by the examiner are:
Murashima 4,967,279 Oct.
30, 1990
Kondo et al. (Kondo) 5,093,716 Mar. 3,
1992
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