Experimental Research On Imaging Technology In Laser Printing Document And Stamp Sequence Inspection

In the document inspection,the vermilion ink sequence appraisal is a relatively common identification item in the appraisal practice.The so-called vermilion ink sequence refers to the sequence of the formation of the writing and the stamp.In the practice of forensic appraisal of documents,common identification methods for the identification of laser printing document and stamp sequence inspection,such as microscope inspection,document checker inspection,etc.,need to be observed and judged by naked eyes after inspection of the intersection,not only need the appraiser to have a wealth of laser printing document and stamp sequence inspection The appraisal experience and level also have requirements for the inspection conditions of printed text and text materials.When the printed text and document color materials penetrate each other and the characteristics are not obvious,it is difficult to distinguish the coverage of the stroke color material.The common identification methods are difficult to draw more accurate conclusions.With the development of scientific and technological methods,the upgrading of various experimental equipment,and when the laser printing document and stamp sequence inspection test method widely used by everyone in the past has limitations,the imaging technology widely used in medicine,chemistry,and forensics has entered our field of vision.among.Therefore,in this context,this article is based on Raman spectroscopy imaging technology and DESI-MSI imaging technology in laser printing document and stamp sequence inspection testing,using related imaging technology,using laser printing documents as the starting point,and testing laser printing document and stamp sequence inspection with 48 different printed texts.Analyze the feasibility of these two imaging technologies in laser printing document and stamp sequence inspection and identification,the main points of inspection and the advantages and disadvantages compared with common inspection methods,this paper summarizes and analyzes what kind of imaging method should be adopted for different types of seals to obtain the best inspection effect,so as to sort out and summarize the application of imaging technology in the vermilion ink sequence inspection of laser printed documents.On this basis,the new test method summarized by this experimental conclusion makes a preliminary exploration on the characteristics and changing laws of common laser printing document and stamp sequence inspection test.The main content of this article is expanded from six parts.The first part summarizes the related theories of laser printing document and stamp sequence inspection,mainly on the basic concepts and classification of laser printing document and stamp sequence inspections.The second part is a related overview of laser printing documents,focusing on the classification of laser printing related principles and the characteristics of laser printing documents,including the related influence of such documents on laser printing document and stamp sequence inspection inspection.The third part first mainly comprehensively describes the common inspection methods,key points of the inspection and the reflection of related characteristics of the laser printing document and stamp sequence inspection,in order to analyze the technical difficulties of the laser printing document and stamp sequence inspection and the limitations of the current inspection method;A basic analysis of the concepts and characteristics of the imaging techniques used in this article.The fourth part and the fifth part are respectively based on the application of Raman spectroscopy imaging technology and DESI-MSI imaging technology in the application of laser printing document and stamp sequence inspection checking in laser printing documents,this paper summarizes and analyzes what kind of imaging method should be adopted for different types of seals to obtain the best inspection effect.Analysis of inferiority.The sixth part is the summary and prospect of the experiment,analyzing the possible limitations of the experiment and discussing the wider application of imaging technology in laser printing document and stamp sequence inspection.