Hiding color watermarks in halftone images using maximum-similarity binary patterns |
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Affiliation: | 1. Department of Entrepreneurship and Logistics, Plekhanov Russian University of Economics, Moscow, Russia;2. Department of Logistics, State University of Management, Moscow, Russia;3. Federal University of Piauí, Teresina, Brazil;1. Polytechnic School of Pernambuco, University of Pernambuco, Recife 50720-001, Brazil;2. Engineering Campus, Rural Federal University of Pernambuco, Cabo de Santo Agostinho 54518-430, Brazil;3. Department of Electronics and Systems, Federal University of Pernambuco, Recife 50740-550, Brazil |
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Abstract: | This paper presents a halftoning-based watermarking method that enables the embedding of a color image into binary black-and-white images. To maintain the quality of halftone images, the method maps watermarks to halftone channels using homogeneous dot patterns. These patterns use a different binary texture arrangement to embed the watermark. To prevent a degradation of the host image, a maximization problem is solved to reduce the associated noise. The objective function of this maximization problem is the binary similarity measure between the original binary halftone and a set of randomly generated patterns. This optimization problem needs to be solved for each dot pattern, resulting in processing overhead and a long running time. To overcome this restriction, parallel computing techniques are used to decrease the processing time. More specifically, the method is tested using a CUDA-based parallel implementation, running on GPUs. The proposed technique produces results with high visual quality and acceptable processing time. |
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Keywords: | Color embedding Halftone Color restoration Watermarking Enhancement |
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