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Please use this identifier to cite or link to this item:
http://hdl.handle.net/1783.1/6689
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| Title: | Methods and apparatus for hiding data in halftone images |
| Authors: | Au, Oscar C.
Fu, Ming Sun |
| Keywords: | Halftone
Data hiding
Watermark |
| Issue Date: | 13-Apr-2010 |
| Citation: | US Patent 7,697,715 B2, 2010 |
| Abstract: | We propose methods for generating a halftone image, in which each pixel takes one of two tone values. The generated image contains hidden data, which is present at data storage pixels chosen using a pseudo-random number generator. In a first case, the data is hidden within an existing halftone image by reversing the tone value at certain of the data storage pixels, and at pixels neighbouring the data storage pixels. In a second case, the halftone image is generated from a greyscale image, and data is hidden during this conversion process. |
| Rights: | This patent is also available at HKUST Technology Transfer Center Patent Search at <http://patentsearch.ttc.ust.hk/ListPatentsDetail.asp?id=626> |
| URI: | http://hdl.handle.net/1783.1/6689 |
| Appears in Collections: | ECE Patents
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Files in This Item:
| File |
Description |
Size | Format |
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| US7697715.pdf | | 2249Kb | Adobe PDF | View/Open |
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