论文部分内容阅读
采用红外图像系统对收集到的针式、激光、喷墨3种类型打印机的打印字迹样本各4份分别进行检验,依据3类打印机打印字迹的可见图像、化学图像和红外谱图,可以鉴别3种类型的打印机。可见图像鉴别可根据字迹的清晰程度及有无虚边等特点加以鉴别,化学图像鉴别可根据在不同的波程范围上化学图像清晰程度不同为依据。红外谱图部分主要是在相同的波程上吸收峰数目不同作为鉴别的主要依据。通过红外图像法鉴别打印机种类与其他方法相比,具有不破坏检材、检测范围广、检测速度快等优点。
Using infrared image system to collect the stylus, laser, inkjet three types of printer printing handwriting samples were tested for 4, respectively, based on type 3 printer printing handwriting visible images, chemical images and infrared spectra can be identified 3 Kind of printer. Visible image identification can be based on the clarity of the handwriting and the presence or absence of virtual edge to be identified, chemical image identification can be based on different degrees of clarity in the different range of chemical images based on the different degrees. The main part of the infrared spectrum is the difference in the number of absorption peaks on the same path as the main basis for identification. Compared with other methods, the type of printer identified by infrared image method has the advantages of not destroying the samples, wide detection range, fast detection speed and the like.