Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Embedded package and method for manufacturing the same
Preferential selection of candidates for delta compression
Method of fabricating display device
Method of forming micropattern, method of forming damascene metallization, and semiconductor device and semiconductor memory device fabricated using the same
Fabrication method of packaging substrate having through-holed interposer embedded therein
Monitoring agent programs in a distributed computing platform
Nonvolatile semiconductor memory device and method for controlling the same
  Randomly Featured Patents
Electrochemical cell structure and method of fabrication
Method and apparatus for detecting and removing obstructions in mechanical aerators
Portable information terminal surrounding formulation of an optimum plan
Semiconductor storage device
High frequency thyristor circuit for energizing a gaseous discharge lamp
Vinyl acetate production using a catalyst comprising palladium and gold deposited on a copper containing carrier
Method for encoding digital audio signals and apparatus thereof
Glass lampshade and method for producing the same
Method and apparatus for transferring and fusing toner images
Multi-color image recording apparatus with two scanners and one printer