Universal Multi-size Watermarking Algorithm for Print-and-Scan Process

ZHANG Wen

Packaging Engineering ›› 2020 ›› Issue (13) : 261-266.

PDF(3669 KB)
PDF(3669 KB)
Packaging Engineering ›› 2020 ›› Issue (13) : 261-266. DOI: 10.19554/j.cnki.1001-3563.2020.13.037

Universal Multi-size Watermarking Algorithm for Print-and-Scan Process

  • ZHANG Wen
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Abstract

The work aims to propose a universal multi-size watermarking algorithm for anti-print-scan process to provide a universality that helps fixed-size watermarks to adapt to host images of different sizes. Host image was divided into layers and blocks to obtain the blocks images and calculate the maximum SVD values of each blocks images. The blocks with the top nine maximum SVD value were selected to form the await-embed image. The holographic watermark was embedded into DWT domain of the await-embed image. The experiments showed that, after embedding the fixed watermark into the host image of different sizes, the invisibility of the watermark image was significantly improved with the increase of the host image size, and the watermark could be extracted smoothly after simulated anti-print-scan process. This algorithm could not only provides the universality that helps fixed-size watermarks to adapt to host images of different sizes, but also improves the invisibility of the watermark after embedding. It shows good robustness to print-scan process, and provides a novel method for the application of digital watermark in anti-counterfeiting printing.

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ZHANG Wen. Universal Multi-size Watermarking Algorithm for Print-and-Scan Process[J]. Packaging Engineering. 2020(13): 261-266 https://doi.org/10.19554/j.cnki.1001-3563.2020.13.037
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