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- W2018473600 abstract "일반적으로 인쇄 문서의 위변조를 방지하기위해 복사방지마크와 이차원 바코드가 많이 사용되고 있다. 하지만 이차원 바코드는 복사 방지 마크와 분리 배치되어 있어 사본 구별이 시각적으로 힘들고, 스캐너로만 인식할 수 있다는 단점이 있다. 따라서 본 논문은 이차원 바코드에 워터마크를 삽입해 시각뿐만 아니라 스캐너로 정확하게 구분 할 수 있는 위변조방지기술에 대해 연구했다. 복사 방지마크는 디지털 입출력 장치의 저주파 필터 특성으로 인해 특정 패턴이 소실되거나 변형되는 것을 이용해 패턴으로 만들었다. 원본과 사본을 스캔한 이미지의 히스토그램을 분석을 통해 성능검증을 했다. 그리고 이차원 바코드를 웹캠이나 핸드폰 카메라로 인식한 인증키로 온라인 서버에 접속해 내용을 확인하는 시스템을 제안했다. Generally, the copy protection mark and 2D bar-code techniques are widely used for forgery protection in printed public documents. But, it is hard to discriminate truth from the copy documents by using exisiting methods, because of that existing 2D-barcode is separated from the copy protection mark and it can be only recognized by specified optical barcord scanner. Therefor, in this paper, we proposed the forgery protection tehchnique for discriminating truth from the copy document by using watermark inserted 2D-barcord, which can be accurately distinguished not only by naked eye, but also by scanner. The copy protection mark consists of deformed patterns that are caused by the lowpass filter characteristic of digital I/O device. From these, we verified the performance of the proposed techniques by applying the histogram analysis based on the original, copy, and scanned copy image of the printed documents. Also, we suggested 2D-barcord confirmation system which can be accessed through the online server by using certification key data which is detected by web-camera, cell phone camera." @default.
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- W2018473600 date "2010-12-25" @default.
- W2018473600 modified "2023-09-30" @default.
- W2018473600 title "Forgery Protection System and 2D Bar-code inserted Watermark" @default.
- W2018473600 doi "https://doi.org/10.5391/jkiis.2010.20.6.825" @default.
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