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:
Apr. 28, 1998
Filed:
Apr. 23, 1997
Mikihiro Ioka, Tokyo, JP;
International Business Machines Corporation, Armonk, NY (US);
Abstract
In order to supply data in which scene switching in a motion picture can be easily detected, pixel data 50 of a motion picture is input and stored in the frame buffer 18 as pixel values 52, and the statistical processor 14 operates the mean value .mu. and standard deviation .alpha. of luminous values using all pixel data 50 of one frame. The conversion table processor 16 sets a pixel conversion table expressing the correspondence between pixel values 52 and normalized output pixel values 54 using the mean value .mu. and standard deviation .alpha., reads pixel values 54 sequentially, and outputs output pixel values 54 for one frame to the detector 12 using the pixel conversion table. The detector 12 obtains differential values between previous output pixel values 54 and current output pixel values 54, judges that the number of pixels exceeding the threshold value, Vth, corresponds to a frame where a scene is switched, and outputs the scene change detection signal 56.