Verifying the Authenticity of Digital Certificate and Transcript Using Background Subtraction Method

摘要

Document forgery of certificate widely reported, as an important topic in verification of authenticity for digital documents of certificate. The object of this study is not only digital certificate documents but also digital transcript documents as usually both digital documents can not be separated. Many studies on forgery detections show that the most case of digital documents forgery of certificate and transcript were used copy-move forgery. To solve this problem, this study proposes in recognizing forgery, segment by segment and level by level, of the target image. Each segmentation forgery can be detected using Background Subtraction approach. The level of forgery was presented by detecting the changes from certificate image to binary image with treshold of 16 pixels in obtaining all pixels. As a result, this approach is able to detect certificate or transcript forgery in the form of signature and any forgery with 1 (one) character of image size.