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
Nitrogen-doped carbon-supported cobalt-iron oxygen reduction catalyst
Generating a representation of an object of interest
Systems and methods to provide report part via a web service
Query processing with specialized query operators
Processes for producing polyunsaturated fatty acids in transgenic organisms
Single mode optical fiber with improved bend performance
Projector
  Randomly Featured Patents
Initial heater control for radiant infant warmer
Streamer devices especially useful as fishing lures
Method for erasing and programming memory devices
Flexible container, method of forming the flexible container, seal-breaking guide of the flexible container, method of enclosing liquid in the flexible container and the liquid enclosed in the
Electrical generator system
Therapy agents, methods of preparation, and methods of use
Cephalosporin compounds
Method of using 5,10,15,20-tetrakis(carboxyphenyl)porphine for detecting cancers of the lung
Compliant hard template for UV imprinting
Method for synchronizing video signals