Process for detecting a change of shot in a succession of video images
US6810145B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2001 |
| Grant date | Oct 26, 2004 |
| Priority date | — |
| Expiry date | Dec 7, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B27/28
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A process comprises a step (2) of creating histograms of an image representing the occurrences of the luminance values as a function of these values. A further step compares (5) a histogram of an image T(t) with a histogram of a previous image T(t−1), and is characterized in that the step of comparing (5) consists of calculating, for an occurrence histo13 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−1) 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 (6) the minimum values for the set of luminance values of the histogram, and comparing (7) the sum obtained with a threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.