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    • 7. 发明申请
    • 真偽判別可能な印刷物、その作成方法及びその作成装置、並びにその判別方法及びその判別装置
    • 可编辑的印刷品及其制造方法,其制造方法及其认证方法及其认证装置
    • WO2003061981A1
    • 2003-07-31
    • PCT/JP2003/000083
    • 2003-01-08
    • 財務省印刷局長が代表する日本国齋藤 和春木内 正人藤田 實
    • 齋藤 和春木内 正人藤田 實
    • B41M3/14
    • B41M3/14
    • Drawing lines (2) constituting a line drawing consists of a basic line portion and a broken line portion. A plurality of basic line portions (5) are gathered into a basic line group constituting a background portion (4) while a plurality of broken line portions (1) are gathered into a broken line group constituting an image portion (3). From the background portion (4) and the image portion (3), information is embedded. The broken line portion (1) consists of a plurality of broken lines (6) each extending in the direction vertical to the longitudinal direction of the drawing lines (2) and arranged at a predetermined interval. It is difficult to recognize the embedded information under visible light by the naked eye. However, the embedded information can easily be detected by a read device such as a scanner. By performing the Fourier transform, extraction of particular frequency, the inverse Fourier transform, and the like, it is possible to easily authenticate a printed sheet with a high accuracy.
    • 构成线条的绘制线(2)由基本线部分和虚线部分组成。 多个基本线部分(5)聚集成构成背景部分(4)的基本线组,而多个虚线部分(1)聚集成构成图像部分(3)的虚线组。 从背景部分(4)和图像部分(3)中嵌入信息。 虚线部分(1)由多条虚线(6)组成,每条虚线沿垂直于牵引线(2)的纵向的方向延伸并以预定间隔布置。 在肉眼可见光下难以识别嵌入的信息。 然而,嵌入信息可以容易地通过诸如扫描仪之类的读取装置来检测。 通过执行傅里叶变换,特定频率的提取,傅里叶逆变换等,可以容易地高精度地认证印刷纸。