Method and apparatus for image processing to detect changes in a scene
US7149361B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 26, 2002 |
| Grant date | Dec 12, 2006 |
| Priority date | — |
| Expiry date | Jul 10, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/7864
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for image processing to detect changes in a scene includes compressing by computing a wavelet transform of an image corresponding to the scene, thresholding coefficients associated with the transform, and comparing a subset of coefficients with values to detect and indicate a change in the image. Values such as averages and a standard deviation therefrom can be generated during training by processing N training images. Determining whether a change has occurred includes determining the value of image sets, standard deviation and training sets, and comparing these, based on the type of change to be ascertained, to statistical information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.