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전성구(Jeon Seong Goo),김일환(Kim Il Hwan) 강원대학교 산업기술연구소 2004 産業技術硏究 Vol.24 No.1
This paper proposes an algorithm of CAD data extraction for the computer controlled marking system. In general, logo has been directly designed at the marking controller, but that is not an effective method because of the very limited working area. In this paper, for the data extraction we used a general PC and Auto CAD for logo design, and developed the software with GUI(Graphic User Interface) method. Then the data is transferred to the marking controller for marking on the object. With experimental result we showed the proposed algorithm to be very effective in the computer controlled marking system.
데이터 매트릭수와 비밀 키를 이용한 하이브리드 워터마킹 방법
전성구(Seong-Goo Jeon),김일환(Il-Hwan Kim) 대한전기학회 2006 정보 및 제어 심포지엄 논문집 Vol.2006 No.1
The Data Matrix of two-dimensional bar codes is a new techNoogy capable of holding relatively large amounts of data compared to the conventional one-dimensional bar code which is just a key that can access detailed information to the host computer database. A secret key is used to prevent a watermark from malicious attacks. We encoded copyright information into a Data Matrix bar code for encoding process and it was spread a pseudo random pattern using owner key. We embedded a randomized watermark into the image using watermark's embedding position, pattern generated with a secret key. The experimental results have shown that the proposed scheme has good quality and is very robust to various attacks, such as JPEG compression and noise. Also the performance of the proposed scheme is verified by comparing the copyright information with the information which is extracted from a bar code scanner.
데이터 매트릭스와 암호 키를 이용한 하이브리드 워터마킹 기법
全盛求(Seong-Goo Jeon),金明東(Myung-Dong Kim),金一煥(Il-Hwan Kim) 대한전기학회 2006 전기학회논문지 D Vol.55 No.9
In this paper we propose a new watermarking scheme using a data matrix and a cryptograph key. The data matrix of two-dimensional bar codes is a new technology capable of holding relatively large amounts of data compared to the conventional one-dimensional bar code. And a cryptograph key is used to prevent a watermark from malicious attacks. We encoded the copyright information into a data matrix bar code, and it was spread as a pseudo random pattern using the owner key. The experimental results show that the proposed scheme has good quality and is robust to various attacks, such as JPEG compression, filtering and resizing. Also the performance of the proposed scheme is verified by comparing the copyright information with the information which is extracted from the watermark.
전성구,김일환 江原大學校 産業技術硏究所 2004 産業技術硏究 Vol.24 No.B
This paper proposes an algorithm of CAD data extraction for the computer controlled marking system. In general, logo has been directly designed at the marking controller, but that is not an effective method because of the very limited working area. In this paper, for the data extraction we used a general PC and Auto CAD for logo design, and developed the software with GUI(Graphic User Interface) method. Then the data is transferred to the marking controller for marking on the object. With experimental result we showed the proposed algorithm to be very effective in the computer controlled marking system.
전성구,김일환 강원대학교 산업기술연구소 2005 産業技術硏究 Vol.25 No.B
In this paper, we propose a new data encoding algorithm for a two-dimensional bar code system. In general, the one-dimensional bar code is just a key which can access detailed information to the host computer database. But the two-dimensional bar code is a new technology which can obtain high density information without access to the host computer database. We implemented the encoding algorithm for Data Matrix bar code which is the most widely used among the many kinds of two-dimensional bar codes in the field of marking using Digital Signal Processor (TMS320C31). The performance of the proposed algorithm is verified by comparing the imprinted symbols on the steel surfaces with the codes which are decoded by a bar code reader.