Television – Camera – system and detail – Optics
Reexamination Certificate
2007-08-28
2007-08-28
Srivastava, Vivek (Department: 2622)
Television
Camera, system and detail
Optics
C348S354000, C396S093000, C396S102000
Reexamination Certificate
active
10775127
ABSTRACT:
A CPU calculates integrating values of image-capturing signals in a band1obtained by removing through a band pass filter a low frequency component of image-capturing signal output from an image-capturing device and integrating values of the image-capturing signals in a band3retaining the low frequency component intact, each calculated in correspondence to one of a plurality of lens positions. The CPU then obtains focal point evaluation values based upon these integrating values in correspondence to the individual bands. In addition, when it is judged that the image-capturing signals are saturated, the CPU calculates a new evaluation value parameter1history record=(focal point evaluation value history record in band3−focal point evaluation value history record in band1). The CPU then determines a new evaluation value parameter1history record extremal value through a 3-point interpolation operation and calculates a lens position corresponding to the extremal value.
REFERENCES:
patent: 5534923 (1996-07-01), Suda
patent: 5539462 (1996-07-01), Lee et al.
patent: 6700618 (2004-03-01), Chubachi
patent: A 6-205268 (1994-07-01), None
Hernandez Nelson D.
Nikon Corporation
Srivastava Vivek
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