Resources Contact Us Home
Focus control apparatus useful for image pick up apparatuses equipped with an auto focus function and method therefor

Image Number 4 for United States Patent #8120698.

A focus control apparatus and method capable of shortening a focus adjustment time in focus control. The method includes extracting a first high frequency component depending upon a first cutoff frequency and a second high frequency component depending upon a second cutoff frequency higher than the first cutoff frequency from a video signal, generating first and second contrast signals of the video signal respectively based on the first and second high frequency components, using a quotient obtained by dividing a value of the first contrast signal by that of the second contrast signal as a parameter, exercising focus control based on the parameter, and setting the first and second cutoff frequencies so as to cause a value of the parameter to assume a peak when a focus lens in an image pickup apparatus is located in a position at a predetermined distance from an in-focus position.

  Recently Added Patents
Process to extract quassinoids
Lens driving device
Illuminating device
Peer-to-peer method of deploying and managing executable code and associated plug-ins
Storage system, control method therefor, and program
Method for assembling a camera module, and camera module
Flash drive
  Randomly Featured Patents
Method and apparatus utilizing agar diffusion technique for determining quantitative drug concentration parameter
Guide member
Heat transfer configuration for a semiconductor device
Transfer molding apparatus having laminated chase block
Camera-steady focus requirements for preventing inconspicuous use of cameras on handheld mobile communication devices
Manufacture of gloves and the like
Circuit for controlling the minimum operating voltage of switching power supply
Award trophy
Box car
Antinociceptive agent derivative