US PATENT SUBCLASS 348 / 349
.~.~.~ Using image signal

Current as of: June, 1999
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207  DF  CAMERA, SYSTEM AND DETAIL {19}
335  DF  .~ Optics {12}
345  DF  .~.~ Focus control {5}
349.~.~.~ Using image signal {5}
350  DF  .~.~.~.~> With auxiliary sensor or separate area on imager
351  DF  .~.~.~.~> With oscillation of lens or sensor to optimize error signal
352  DF  .~.~.~.~> With motion detection
353  DF  .~.~.~.~> By detecting contrast
354  DF  .~.~.~.~> By analyzing high frequency component {2}

DEFINITION

Classification: 348/349

Using image signal:

(under subclass 345) Subject matter including a device for detecting a characteristic of the video output of the camera sensor for determining a focus condition.