• 한국지능시스템학회논문지
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• 제16권2호
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• pp.240-246
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• 2006

This paper proposes the intelligent immigration control system that authorizes the traveler through immigration and detects forged passports by using automatic recognition of passport codes, the passport photo and face verification. The proposed system extracts and deskewes the areas of passport codes from the passport image. This paper proposes the novel ART algorithm creating the adaptive clusters to the variations of input patterns and it is applied to the extracted code areas for the code recognition. After compensating heuristically the recognition result, the detection of forged passports is achieved by using the picture and face verification between the passport photo extracted from the passport image and the picture retrieved from the database based on the recognized codes. Due to the proposed ART algorithm and the heuristic refinement, the proposed system relatively shows better performance.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2013년도 춘계학술대회
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• pp.379-381
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• 2013

본 논문에서는 문서 이미지에서 문장 사이에 공백영역의 기울기를 검출하고 보정하는 방법을 제안한다. 제안하는 방법은 문서 이미지에서 에지를 추출한 문장 사이에 가지는 공백들의 기울기 값을 통해 문서 이미지의 기울기를 보정한다. 문서 이미지를 일부의 영역으로 나누어서 처리함으로써 문서 내 외곽의 여백영역, 그림, 다단형식 등에 대해서 강건한 처리 결과를 보여준다. 제안하는 방법은 문자 영역의 픽셀을 이용하는 것이 아닌, 공백영역을 이용함으로써 기존의 방법보다 선명한 화질은 물론 저화질 문서 이미지에서도 효과적으로 보정된다.

• 전자공학회논문지B
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• 제31B권8호
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• pp.137-147
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• 1994

In this paper,we propose a knowledge-based system for locating Destination Address Block(DAB) by analyzing the structure of Korean envelope images. In the proposed system the preprocessing steps such as adaptive binarization connected component extraction and deskewing are carried out first for the effective structure analysis of the envelope image. Then DAB containing address name and zipcode parts of the input envelope image is extracted by an iterative procedure based on the knowledge acquired from the statistical feature analysis of the various envelope images. Most of the system for slocating address blocks on envelopes have extracted DAB by segmenting an envelope image into several candidate blocks followed by selecting one among the candidate blocks. Because it is very difficult to segment a Korean envelope image into several blocks due to the specific writing habits that the addresses on the envelope are written in close proximity to each other the proposed iterative procedure determines DAB by splitting or merging the connected components and verifies the determined DAB without segmentation and selection. Experiments with a great number of the live envelopes provided from Seoul Mail Center in Koorea were carried out. The results reveal that the proposed system is very effective for address block location on Korean envelopes.