基于 CCD 检测的半色调防伪技术的研究

探讨了一种半色调图像的防伪信息嵌入与提取方法,运用网点生成原理和数据库技术,实现了在 RIP 处理后生成的半色调图像文件中嵌入隐藏信息,并利用 CCD 设备扫描嵌入隐藏信息的印刷品,结合算法实现隐藏信息的提取。 实验结果表明:与数据库技术的结合,大大提高了嵌入信息的灵活性和隐蔽性,信息嵌入和提取的速度很快,且该方法不增加额外的印刷成本,嵌入信息的不可见性好,可广泛应用于包装防伪和证件、证书防伪中。

Halftone Anti-counterfeiting Technology Based on CCD Detection

An anti-counterfeiting information embedding and extracting method based on halftone image was discussed, which used the principle of dot generation and database technology to realize embedding the hidden information into the generated halftone image files after RIP processing. CCD scanning equipment was used to scan the print with the hidden information and extraction of the hidden information was realized using algorithm. The experimental results showed that the combination of database technology greatly improves the hidden information content flexibility, and this method has high speed in embedding and extracting information; the method doesn't need additional printing cost; the embedded information is invisible. It was concluded that the method can be widely used in packaging and certificate anti-counterfeiting field.