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:
Oct. 26, 2004
Filed:
Apr. 04, 2001
Gérard Briand, Ploufragan, FR;
Jean-Yves Babonneau, Le Rheu, FR;
Alain Verdier, Vern sur Seiche, FR;
Thomson Licensing, S.A., Boulogne-Billancourt, FR;
Abstract
A process comprises a step ( ) of creating histograms of an image representing the occurrences of the luminance values as a function of these values. A further step compares ( ) a histogram of an image T(t) with a histogram of a previous image T(t− ), and is characterized in that the step of comparing ( ) consists of calculating, for an occurrence histo lum (n,t) corresponding to a luminance value n in the image T(t), the absolute differences between this occurrence and the occurrences histo_lum (n+k, t− ) of the previous image, where K is a natural integer and varies from −K to +K. The process is further characterized by choosing the minimum value Min_Diff (n, t) from among these differences, and is characterized further by in summing ( ) the minimum values for the set of luminance values of the histogram, and comparing ( ) the sum obtained with a threshold.