| Budget Amount *help |
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
In this study, we developed a digital watermark embedding method using three-dimensional histogram. In order to evaluate the strength of digital watermark, we proposed Deterioration Evaluation Index (DEI) multiplied by Peak signal-to-noise ratio (PSNR) and Structural similarity (SSIM). We applied the digital watermark embedding method to printed matter. We detected the digital watermark from an image reconstructed after scanning the printed matter by creating a three-dimensional histogram using three frequency components on the high frequency side among the four frequency components obtained by wavelet transform of the grayscale image.
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