(12) United States Patent
Diggins METHOD OF IMAGE ANALYSIS OF AN IMAGE IN A SEQUENCE OF IMAGES TO DETERMINE A CROSS-FADE MEASURE Inventor: Jonathan Diggins, Eastleigh (GB) Assignee: Snell Limited, Hampshire (GB) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 913 days. Appl. No.: 12/162,911 PCT Filed: Feb. 5, 2007 PCT No.: PCT/GB2007/000378 § 371 (0)0), (2), (4) Date: Jul. 31, 2008 PCT Pub. No.: WO2007/088389 PCT Pub. Date: Aug. 9, 2007 Prior Publication Data US 2009/0034876 A1 Feb. 5, 2009 Foreign Application Priority Data Feb. 3, 2006 (GB) ................................. .. 0602213.1 Int. Cl. G06K 9/64 (2006.01) G06K 9/00 (2006.01) H04N 9/64 (2006.01) U.S. Cl. ....... .. 382/218; 382/107; 382/286; 348/700 Field of Classification Search ................ .. 382/218, 382/107, 286, 173; 348/19, 700; 375/240.01, 375/240.14
See application file for complete search history.
The present invention relates to a method of and apparatus for image analysis and in particular may relate to the detection of cross-fades in film or video sequences. The invention relates in particular to a method of analysing an image of a sequence of images to determine a cross-fade measure based on determined temporal picture information transitions associated With picture elements of the image. In particular, the crossfade measure may be determined based on the extent to Which the temporal picture information transitions are uniform. The method and apparatus of the invention can provide a measure of likelihood of a cross-fade in a single pass. In addition the described method can be accomplished in real-time or close to real-time. In addition the cross-fade detection results are comparable With, or better than, the results achieved by the prior art methods.
»InIII>I1-IIIIW
I01!
611 mm HM M
M
I_=I1III1lY<II>] ' y_m [Ylrd] In) - G t In M _| ¢,<I:4-D.,) If--|+ I M °“ I_J\75
Zhang, Hongjiang, et al., “Automatic Partitioning of Full-motion Video”, Multimedia Systems, vol. 1, No. 1, Jan. 1993, pp. 10-28. Otsuji, K. et al., “Video Browsing Using Brightness Data”, Proceedings of The SPIE, vol. 1606, Nov. 11, 1991, pp. 980-989. Boreczky, J . S. et al., “Comparison of Video Shot Boundary Detection Techniques” Journal of Electronic Imaging, vol. 5, No. 2, Apr. 1996, pp. 122-127.
Lienhart, Rainer, “Reliable Transition Detection in Videos: A Survey and Practitioner’ s Guide”, International Journal of Image and Graphics, vol. 1, No. 3, Jul. 2001, pp. 469-486.
International Search Report for International Application No. PCT/ GB2007/000378, Oct. 5, 2007.
proportion of A proportion of B 100% \ 100% \ \\ /// T\\\ ///'p \\\\ ///I :-:’ //// \\\\ // \\I Image 1 2 3 4 5
ima e ima e ima e .
g Q 9 lummance value
S3O'\ Determine temporal transition in picture information associated with picture element
s32 Determine cross-fade measure \ dependent on temporal picture information transitions associated with picture elements
|
