Encoding method for generating a data-bearing halftone image, and decoding method for decoding the data-bearing image
US9344600B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 4, 2015 |
| Grant date | May 17, 2016 |
| Priority date | — |
| Expiry date | Jun 4, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/3271
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An encoding system is for generating a data-bearing halftone image. The encoding system is configured to: convert a grayscale image into a halftone image having a plurality of image cells; select, from the halftone image, at least one of the image cells to be a carrier cell according to a set of reference dot patterns, the carrier cell having a dot pattern identical to one of the reference dot patterns; and generate a data-bearing halftone image by replacing the dot pattern of the carrier cell by a specified one of multiple encoding dot patterns of one of a plurality of the sets of encoding dot patterns each being associated with a code. The data-bearing halftone image is encoded with a code associated with the one of the sets of the encoding dot patterns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.