Research on the Characteristics of Imitated Photosensitive Stamp and Rubbing Real Impression with Photoshop Software
Objective The development of modern highly imitated stamp technology has brought unprecedented challenges to forensic identification of stamp impression.In order to accurately determine the nature of stamp impression characteristics and draw correct conclusions,it is necessary to understand the impression characteristics generated by different forgery methods.Methods Using Photoshop software,20 photosensitive stamps were imitated by rubbing real impression with different graphic and textual content.The characteristics,origin,as well as the value of counterfeiting photosensitive stamp and impression were analyzed by comparing impression of imitated stamp with the ones that have been rubbed during the imitation process.Results Our results showed that imitated photosensitive stamp impressions were highly consistent with real impression,leading to significant difficulties in identification.However,the characteristics of stamp and impression were also influenced by the skills of the forger and the conditions of making the stamp,resulting in slight difference.As long as comprehensive and meticulous comparison and evaluation were performed,the accurate and reliable opinions can also be obtained.Conclusion The high similarity between the counterfeiting photosensitive stamp impression by Photoshop software and real impression requires forensic experts to observe and study the questioned stamp impression carefully.By the means of collecting high-quality and large quantity known stamp impressions and conducting comprehensive and detailed feature comparisons,forensic experts could be familiar with the method of counterfeiting stamps and understand the characteristics of stamp impression,and thus accurate and reliable identification could be achieved.
photosensitive stampcharacteristic of stamp impressionPhotoshop softwareforensic identification of stamp impression
万方数据
维普
