Abstract: Just as digital imaging can be used to facilitate questioned documents examination, it can also be abused to fraud documents. In this study, three types of documents fabricated by digital imaging techniques were demonstrated, which are cut-paste documents, altered signatures and color printed seals and signatures. Digital imaging can avoid many "defects" produced by traditional methods. Impacts of the abuse of digital imaging are discussed.

Key words: digital imaging, forged document, questioned documents

摘要： 介绍了利用数字图象处理技术剪贴伪造文件、变造签名、彩色打印伪造原始印文和签名等三种伪造文件的方法及其特点,数字图象处理技术能够克服许多传统伪造方法的“缺点”,使伪造的文件达到较高的逼真度。讨论了数字图象处理技术的滥用引发的新问题。

关键词: 数字图像处理, 伪造文件, 文件检验