• The Journal of Korean Institute of Communications and Information Sciences
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• v.21 no.12
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• pp.3056-3068
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• 1996

This papre presents the RDM algorithm for composition of bit. After this, we propose a digital signature scheme for facsimile document using RDM algorithm. We modify the even-odd feature in distance of changing pel between coding line and multiple reference line which have been scanned before, and run-length in coding line. The time to take in signature is reduced by spreading of signature. Non-repudiation in origin, the 3rd condition of digital signature is realized by proposed digital signature scheme. The transmitter embeds the signature secretly and tensfers it, and the receiver makes a check of any forgery on the signature and the document. This scheme is compatible with the ITU-T.4(G3 or G4 facsimile standard). The total amount of data transmitted and the quality of image are about the same to that of the original document, thus a third party does not notics signature embeded on the document.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.27 no.8A
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• pp.805-813
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• 2002

Document image should be classified into detailed regions as text, picture, table and etc through the geometric layout analysis if paper documents can be converted automatically into electronic documents. However, complexity of the document layout and variety of the size and density of a picture are the reason to make it difficult to analyze the geometric layout of the document images. In this paper, we propose the method which have a better performance of the region segmentation and classifications, and the line extraction in the table region than the commercial softwares and previous methods. The proposed method can segment the document into detailed regions by using connected components method even if its layout is complex. This method also classifies texts and pictures by using separable median filter even. Though their size and density are diverse, In addition, this method extracts the lines from the table adapting one dimensional median filter to the each horizontal and vertical direction, even though lines are deformed or texts attached to them.

• Journal of Legislation Research
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• no.44
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• pp.725-756
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• 2013

In this paper, the possibility of extension of falsification conception was investigated to discuss the validity of this precedent. Consequently this extension was indispensible according to the article 237-2 of criminal code which regards the reproduced document as the document in the document crime. However, this is against the security of human right. On the contrary, there is not this kind of article in the German criminal code and the German precedents and majority theory are negative to regard it as the criminal document. And also, there is the pont of view that the reproduced document is not the criminal document because it's not the expression itself of document nominee's intention, so the article 237-2 should be demolished in Korea. According to this opinion, the serious reconsideration should be required in the legislation of this article 237-2. Nevertheless, if this extended conception is needed and it's possible, the meaning of the computer monitor's image is not able to be ignored in the conception of falsification. Therefore this should be regarded as the element of the falsification conception. In other words, this can't be evaluated as the object of falsification but the target of falsification, according to the conception extension, though the precedents do not regard it as the document in document crime.

• Journal of Korea Multimedia Society
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• v.20 no.6
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• pp.882-892
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• 2017

Locally Likely Arrangement Hashing (LLAH) is a method that describes image features based on the geometry between their neighbors. Thus, it has been preferred to implement augmented reality on poorly-textured objects such as text documents. However, LLAH strongly requires that image features be detected with high repeatability and located at a distance from one another. To fulfill the requirement for text document, this paper proposes a method that facilitates the word detection in infrared (IR) range by adjusting the IR-reflectance of words. Specifically, the words are printed out with two different black inks: one is using the K(carbon black) ink only, the other is mixing the C(cyan), M(magenta), Y(yellow) inks. Since only the words printed out with the K ink is visible in IR range, a part of words are selected in advance to be used as features and printed out the K ink. The selected words can be robustly detected with high repeatability in IR range and this enables to implement augmented reality on text documents with high fidelity. The validity of the proposed method was verified through experiments.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.6 no.2
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• pp.181-189
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• 2002

In this paper, we designed and implemented Avata construction system using XML(extensible Markup Language) and SVG(Scalable Vector Graphic). The Web character created with Avata(or Web character) construction system are displayed in same (on without damage of image, regardless terminal type and user can modify and change image easily in form that want. Compare with existing Web character system, the Reusability of web character part element Is increased greatly with Avata construction system of this paper. Because SVG is described by text, graphic retrieval is convenient, and applications can use easily SVG document. Also, SVG can create web graphic document dynamically with database because can access easily in all graphic primitives of line, Polygon, text, image etc. As well as web character using study finding, we may develop usable technology to some contents on World Wide Web.

• Journal of Internet Computing and Services
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• v.2 no.2
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• pp.37-50
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• 2001

To access massive and various HTML documents that are in the web using wireless Internet equipments, another WML document that is equal to the HTML document must be written, In the case Web documents written by HTML are massive, the construction of a WML site with the same information needs much cost of space and time, This paper designs and implements the HTML-XML converter that alleviates such a problem. The HTML-WML converter translates the Web document written by HTML to the WML document for portable wireless equipments, The HTML-XML converter has advantages that it reconstructs WML document dynamically according to portable wireless equipments and processes various image formats such as GIF, JPG, BMP, and so on, The HTML-WML converter can be used as not only a utility of the WML editor but also a real-time converter on wireless Internet.

• Journal of Internet Computing and Services
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• v.2 no.2
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• pp.1-9
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• 2001

To access massive and various HTML documents that are in the web using wireless Internet equipments, another WML document that is equal to the HTML document must be written. In the case Web documents written by HTML are massive, the construction of a WML site with the same information needs much cost of space and time. This paper designs and implements the HTML-XML converter that alleviates such a problem. The HTML-XML converter translates the Web document written by HTML to the WML document for portable wireless equipments. The HTML-XML converter has advantages that it reconstructs WML document dynamically according to portable wireless equipments and processes various image formats such as GIF, JPG, BMP, and so on. The HTML-WML converter can be used as not only a utility of the WML editor but also a real time converter on wireless internet.

• Proceedings of the Korean Information Science Society Conference
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• 2004.10b
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• pp.592-594
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• 2004

문서 영상 획득(document scanning)은 문서 영상 분석과 인식을 위한 중요한 단계이다 최근, 문서 영상 획득 장치로 스캐너(flat scanner)가 가장 많이 이용되고 있지만, 만지면 망가질 것 같은 얇은 고서, 매우 두꺼운 책과 같은 문서를 획득하기에는 어려움이 있다 이런 어려움을 해결하기 위해, 카메라를 이용한 문서 영상 획득에 관한 않은 연구가 진행되고 있으며, 카메라의 저해상도나 잡음과 칼은 문제를 해결하면, 스캐너를 대신하는 입력 장치로 이용할 수 있다. 저해상도 문제를 해결하는 방법으로 기본의 일반적인 레지스트레이션(registration) 방법은, 연결 부분(stitching position)에서 오브젝트(object: text, graphics, image)의 왜곡이 생기는 문제점이 있다. 본 논문에서는 PTZ(pan-tilt-zoom) 카메라를 이용하여 연결 부분에서 왜곡을 최소화하여 오브젝트를 획득하는 컴포넌트 기반의 영상 레지스트레이션(component-based image registration) 방법을 제안한다. 제안한 방법은 연결 부분에서 오브젝트의 수를 최소화하는데 목적이 있으며, 일반적인 레지스트레이션 방법에 비해 연결 부분에서 왜곡을 상당히 줄일 수 있으며, 상대적으로 인식률을 놓일 수 있다.

• Proceedings of the Korea Contents Association Conference
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• 2003.11a
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• pp.96-102
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• 2003

The human knowledge has been integrated mainly through the text documents. The computer technologies changed the way of production and deliverly of the documents from analog to digital. During the paradigm shift, a serious problem must occur due to a large gap between the old contents and newly generated contents. This paper reviews some methods to reduce the gap for the text document image contents.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.18 no.1
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• pp.10-22
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• 1993

In this paper, we proposed a Neuro-FAX algorithm having high compression rate and good reconstruction capability in spite of noise and fonts. This algorithm processes the character part and the image part seperately. In the character part, we recognized each characters in document using neural networks, and transmitted the information recognized. And we transmitted the image part as it is by the conventional method. With character set in receiving terminal. it can produce nice document of noise free characters and different font.