Apparatus for embedding data into transform and spatial domains of an image
US7171017B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2001 |
| Grant date | Jan 30, 2007 |
| Priority date | — |
| Expiry date | Oct 26, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2201/0203
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image processing apparatus is operable to embed data into an image. Images such as those generated from an inter-laced scan may comprise a frame of image data, the frame comprising first and second image fields. The image processing apparatus comprises a combining processor operable to introduce the data to be embedded into at least one of the first and second fields of the image frame. As such a likelihood of a perceivable effect of the embedded data on the image may be reduced, because the images are viewed as a frame. The embedded data may also have an increased likelihood of being detected because some processing may effect the image frame more then the fields of the image. The combining processor may be operable to represent the data to be embedded in a transform domain form, and, in combination with a transform processor, combine the data to be embedded with the first and/or second fields with the image in a transform domain form or a spatial domain form. The transform domain may provide a plurality of sub-bands and the data to be embedded may be introduced into at least one of the sub-bands of the transform domain form of the first and/or second fields of the image. Furth…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.