Detecting double JPEG compression in images
US8200034B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 13, 2009 |
| Grant date | Jun 12, 2012 |
| Priority date | — |
| Expiry date | Apr 3, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30168
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Techniques are generally described for detecting double JPEG compression in images. Example detection techniques of double JPEG compression may include receiving JPEG images for analysis and extracting 2-dimensional (2-D) arrays of JPEG coefficients from the images. 2-D difference arrays may be generated from the array of JPEG coefficients, with the entries in the difference array reflecting relative changes in values of pairs of entries in the array of JPEG coefficients. The detection techniques also model the difference arrays using random processes, and evaluate whether the random processes reveal statistical artifacts in the JPEG images. These statistical artifacts result from double JPEG impression performed on the JPEG images.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.