The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 24, 2013
Filed:
Feb. 27, 2012
Keiji Toyoda, Kanagawa, JP;
Keiji Toyoda, Kanagawa, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An average value calculation sectioncalculates an average value of each line during the validity period of an input image signal. A three-field average value calculation sectioncalculates a 50 Hz flicker signal from which the light and shade of a subject is removed. A difference value calculation sectionsubtracts an n-field preceding field line average value from the line average value of the present frame. Then, a 60 Hz flicker signal, from which the light and shade of the subject is removed, is calculated by dividing the difference value by the line average value of the present frame. A flicker determination sectiondetermines whether flicker exists or not, and whether the flicker frequency is 50 Hz or 60 Hz, on the basis of the extraction results of the 50 Hz flicker component extraction section, and of the 60 Hz flicker component extraction section