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:
Jul. 10, 2012
Filed:
Dec. 11, 2007
Zhicheng Lancelot Wang, Los Altos, CA (US);
Zhicheng Lancelot Wang, Los Altos, CA (US);
Ericsson Television Inc., Duluth, GA (US);
Abstract
There is provided a method of pre-processing video data to detect flashes, comprising calculating a normalized difference index value for a Luminance [Y] component of the video data, calculating a normalized difference index value for Chrominance [U and V] components of the video data, calculating a normalized luminance [Y] mean gradient index for the video data, and providing an indication that a flash has been detected when all the following conditions are satisfied: the normalized difference index value for the Luminance [Y] component is greater than a first predetermined threshold (T); the normalized difference index value for the Chrominance [U and V] components is less than a second predetermined threshold (T); and a difference between the normalized difference index value for the Chrominance [U and V] components and the normalized luminance [Y] mean gradient index is less than or equal to a third pre-determined threshold (T).