Development of digital watermark embedding method using three-dimensional histogram for digital images and printed matter

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K12029
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Multimedia database
• Research Institution: Tohoku Institute of Technology
• Principal Investigator: Koichi Kawano 東北工業大学, 工学部, 准教授 (70359553)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 電子透かし / 3次元ヒストグラム / ディジタル画像 / 印刷物 / ウェーブレット変換 / 画質評価 / 特徴空間の可視化 / 公開鍵暗号方式

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.

Free Research Field

衛星リモートセンシング