JP2006003428A5

JP2006003428A5 -

Info

Publication number: JP2006003428A5
Application number: JP2004177183A
Authority: JP
Filing date: 2004-06-15
Publication date: 2007-01-25
Anticipated expiration: 2024-06-15

Claims

First signal generating means for extracting a part of a frequency component from a video signal obtained by photoelectrically converting an object image formed by the photographing optical system and generating a first signal corresponding to the frequency component; ,
Detecting means for detecting information for obtaining a moving amount of the focus lens included in the photographing optical system to the in-focus position ;
Control means for performing first control based on the first signal and second control based on detection information of the detection means for the focus lens ;
Second signal generating means for generating a second signal corresponding to a comparison value of a plurality of different values in the video signal;
The focus control apparatus, wherein the control means selects one of the first and second controls based on the second signal.

The focus control apparatus according to claim 1, wherein the second signal is a signal corresponding to a ratio of a plurality of different frequency components in the video signal.

The focus control apparatus according to claim 1, wherein the second signal is a signal indicating a degree of focus of the video signal.

The control means performs the first control when the second signal is larger than a threshold value , and performs the second control when the second signal is smaller than the threshold value. The focus control apparatus according to claim 3 .

First signal generating means for extracting a part of a frequency component from a video signal obtained by photoelectrically converting an object image formed by the photographing optical system and generating a first signal corresponding to the frequency component; ,
Detecting means for detecting information for obtaining a moving amount of the focus lens included in the photographing optical system to the in-focus position ;
Control means for performing first control based on the first signal and second control based on detection information of the detection means for the focus lens ;
Second signal generating means for generating a second signal indicating a change in the amount of change in the first signal;
The focus control apparatus, wherein the control means selects one of the first and second controls based on the second signal.

The control means performs the first control when the sign of the second signal is negative, and performs the second control when the sign of the second signal is positive. Item 6. The focus control device according to Item 5 .

First signal generating means for extracting a part of a frequency component from a video signal obtained by photoelectrically converting an object image formed by the photographing optical system and generating a first signal corresponding to the frequency component; ,
  Detecting means for detecting information for obtaining a moving amount of the focus lens included in the photographing optical system to the in-focus position;
  Control means for performing first control based on the first signal and second control based on detection information of the detection means for the focus lens;
  Second signal generating means for normalizing the first signal and generating a second signal;
  The focus control apparatus, wherein the control means selects one of the first and second controls based on the second signal.

A focus control device according to any one of claims 1 to 7,
An imaging device comprising: an image sensor that photoelectrically converts the subject image.