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2010

Orientation Modulation for Data Hiding in Clustered-Dot Halftone Prints

8 years 4 months ago
Orientation Modulation for Data Hiding in Clustered-Dot Halftone Prints
We present a new framework for data hiding in images printed with clustered dot halftones. Our application scenario, like other hardcopy embedding methods, encounters fundamental challenges due to extreme bilevel quantization inherent in halftoning, the stringent requirements of image fidelity, and other unavoidable printing and scanning distortions. To overcome these challenges, while still allowing for automated extraction of the embedded data and a high embedding capacity, we propose a number of innovations. First, we perform the embedding jointly with the halftoning by employing an analytical halftone threshold function that allows steering of the halftone spot orientation within each halftone cell based upon embedded data. In this process, image fidelity is emphasized and, if necessary, the capability to recover individual data values is sacrificed resulting in unavoidable erasures and errors. To overcome these and other sources of errors, we propose a suitable data detection and ...
Orhan Bulan, Gaurav Sharma, Vishal Monga
Added 22 May 2011
Updated 22 May 2011
Type Journal
Year 2010
Where TIP
Authors Orhan Bulan, Gaurav Sharma, Vishal Monga
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