• 한국통신학회논문지
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• 제23권6호
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• pp.1546-1553
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• 1998

본 논문에서는 복잡한 암호학적 연산없이 숨겨진 화상을 복원할 수 있는 시각암호를 이용한 개인 인증 방식에 대하여 고찰한다. Katoh와 Imai는 1개의 표시화상에 인증을 위한 2개의 질문 화상을 숨길 수 있는 방식을 제안하였다. 이 방식을 확장시켜 복수개의 질문화사을 숨길 수 있는 일반화 구성법을 제시한다. 나아가, Droste방식을 적용시켜 모든 슬라이드의 조합에 따라 서로 다른 비밀화상을 숨길 수 있는 방식을 제안한다.

• 대한의용생체공학회:의공학회지
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• 제43권6호
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• pp.441-447
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• 2022

In this paper, we propose a pill identification model using engraved text feature and image feature such as shape and color, and compare it with an identification model that does not use engraved text feature to verify the possibility of improving identification performance by improving recognition rate of the engraved text. The data consisted of 100 classes and used 10 images per class. The engraved text feature was acquired through Keras OCR based on deep learning and 1D CNN, and the image feature was acquired through 2D CNN. According to the identification results, the accuracy of the text recognition model was 90%. The accuracy of the comparative model and the proposed model was 91.9% and 97.6%. The accuracy, precision, recall, and F1-score of the proposed model were better than those of the comparative model in terms of statistical significance. As a result, we confirmed that the expansion of the range of feature improved the performance of the identification model.

• Imaging Science in Dentistry
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• 제51권2호
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• pp.187-193
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• 2021

Purpose: This study aimed to assess the usefulness of machine learning and automation techniques to match pairs of panoramic radiographs for personal identification. Materials and Methods: Two hundred panoramic radiographs from 100 patients (50 males and 50 females) were randomly selected from a private radiological service database. Initially, 14 linear and angular measurements of the radiographs were made by an expert. Eight ratio indices derived from the original measurements were applied to a statistical algorithm to match radiographs from the same patients, simulating a semi-automated personal identification process. Subsequently, measurements were automatically generated using a deep neural network for image recognition, simulating a fully automated personal identification process. Results: Approximately 85% of the radiographs were correctly matched by the automated personal identification process. In a limited number of cases, the image recognition algorithm identified 2 potential matches for the same individual. No statistically significant differences were found between measurements performed by the expert on panoramic radiographs from the same patients. Conclusion: Personal identification might be performed with the aid of image recognition algorithms and machine learning techniques. This approach will likely facilitate the complex task of personal identification by performing an initial screening of radiographs and matching ante-mortem and post-mortem images from the same individuals.

• 한국컴퓨터정보학회논문지
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• 제27권9호
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• pp.191-203
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• 2022

화장품 및 뷰티산업에서 고객 맞춤형 제품과 서비스를 제공하는 것은 주요 기술 트렌드이고, 피부상태 진단과 관리는 중요한 필수기능이다. 고객의 요구 수준은 더욱더 높아지고 있으며 이에 대한 다양하고 섬세한 고민과 요구 사항이 소셜미디어 커뮤니티에서 활발하게 다루어지고 있다. 소셜미디어 상의 이미지는 매우 다양하고 비정형적이므로 피부상태 진단 및 관리에 필요한 체계적인 피부 이미지 식별을 위한 시스템이 필요하다. 본 논문에서는 소셜미디어 인스타그램에서 수집한 빅데이터로부터 피부 이미지 데이터를 지능적으로 식별하고, 피부상태 진단 및 관리를 위한 정형화된 피부 샘플 데이터를 추출하는 시스템을 개발하였다. 본 논문에서 제안한 시스템은 빅데이터수집분석단계, 피부이미지분석단계, 훈련데이터준비단계, 인공신경망훈련단계, 피부이미지식별단계로 구성된다. 빅데이터수집분석단계에서는 인스타그램으로부터 빅데이터를 수집하고 피부 상태 진단 및 관리를 위한 이미지 정보를 분석결과로 저장한다. 피부이미지분석단계에서는 전통적인 이미지 처리 기법을 사용하여 피부 이미지의 평가 및 분석 결과를 획득한다. 훈련데이터준비단계에서는 피부이미지 분석결과로부터 피부 샘플데이터를 추출하여 훈련데이터를 준비하였다. 그리고 인공신경망훈련단계에서는 이 훈련데이터를 사용하여 지능적으로 피부 이미지 유형을 예측하는 인공신경망 AnnSampleSkin을 단계별 고도화와 훈련을 통해 모델을 완성하였다. 피부이미지식별단계에서는 소셜미디어로부터 수집된 이미지에 대해 피부샘플을 추출하고, 훈련된 인공신경망 AnnSampleSkin의 이미지 유형 예측 결과들을 통합하여 최종 피부 이미지 유형을 지능적으로 식별한다. 본 논문에서 제안된 피부이미지식별 방법은 약 92% 이상의 높은 피부 이미지 식별 정확도를 나타내고 있고, 정형화된 피부 샘플 이미지 빅데이터를 제공할 수 있게 되었다. 추출된 피부샘플 세트는 피부 상태를 진단하고 관리하는데 매우 효율적이고 유용한 정형화된 피부 이미지 데이터로 사용될 것으로 기대된다.

• 대한전자공학회논문지SP
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• 제48권4호
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• pp.76-85
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• 2011

본 논문에서는 Gabor 특징과 웨이브렛 영역의 BDIP와 BVLC 특징을 이용한 질감 특징 기반 언어 인식 방법을 제안한다. 제안된 방법에서는 먼저 시험 영상에 Gabor 변환과 웨이브렛 변환을 적용한다. 웨이브렛 영역의 상세 대역에는 Donoho의 연역치화를 적용하여 잡음을 제거한다. 이어서 Gabor 영상에는 크기 연산자를 적용하고 웨이브렛 부대역에는 BDIP와 BVLC 연산자를 적용한다. 그런 다음 Gabor 크기 영상과 BDIP, BVLC 부대역에 대하여 통계치를 계산하여 그 결과들을 벡터화하고 융합하여 특징 벡터로 사용한다. 분류 단계에서는 얼굴 인식에 주로 사용되는 WPCA를 분류기로 하여 시험 특징 벡터와 가장 유사한 학습 특징 벡터를 찾는다. 실험 결과 제안된 방법은 실험 문서 영상 DB에 대하여 비교적 낮은 특징 벡터 차원으로 매우 우수한 언어 인식 성능을 보여준다.

• 한국조경학회지
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• 제13권1호
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• pp.109-121
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• 1985

A study on the image identification of urban streetscape is valuable for illuminating identity that is not yet fully approached in the field of environmental design. This analysis of urban streetscape for image identification allows us to make a more detailed exploration of an important approaching methods in dealing with the structural characteristics of identity. As a matter of fact, the earlier indirect studies on this image identification were made by environmental designers, such as architectural and urban designer in the field of environmental perception and came to its environmental cognition & environmental pattern research with assistances by such researchers as K. Lynch A. Rapoport & Christopher Alexander. Through its environmental perception research, we can see its structural characteristics that is aesthetic & visual structural contents of physical environmental elements. And we can see its cognitive characteristics through the environmental cognitive research, that is continuity, territoriality, identity of place, uniqueness or individuality, meaning & symbolism. Through its environmental pattern research, we can see its physical, socio - economic, cultural and symbolic pattern identification contents, that is physical form of the city, style of the street, pattern of streetscape, socio- economic & geographical locality, arid life cycle, life style, common style of the behavior, cultural pattern of the activity, socio - cultural expression of the symbol. In these process, we can set up a set of the environmental design criterias from those three integral studies for identity. And for an environmental research, Tongsung-Ro around the CBD (central business district) in Taegu City was selected for a case study, because this streetscape is suitable for that approaching methods in this study.

• International Journal of Computer Science & Network Security
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• 제24권4호
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• pp.51-59
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• 2024

In this work, we focused on reducing the amount of image data to be sent by extracting and progressively sending prominent image features to high-performance computing systems taking into consideration the right amount of image data required by object identification application. We demonstrate that with our technique called Progressive Object Detection over a Lossless Network using Fragmented DCT Coefficients (Proficient), object identification applications can detect objects with at least 70% combined confidence level by using less than half of the image data.

• IEIE Transactions on Smart Processing and Computing
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• 제6권4호
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• pp.262-268
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• 2017

Intelligent video surveillance systems have been developed to monitor global areas and find specific target objects using a large-scale database. However, person re-identification presents some challenges, such as pose change and occlusions. To solve the problems, this paper presents an improved person re-identification method using sparse representation and saliency-based dictionary construction. The proposed method consists of three parts: i) feature description based on salient colors and textures for dictionary elements, ii) orthogonal atom selection using cosine similarity to deal with pose and viewpoint change, and iii) measurement of reconstruction error to rank the gallery corresponding a probe object. The proposed method provides good performance, since robust descriptors used as a dictionary atom are generated by weighting some salient features, and dictionary atoms are selected by reducing excessive redundancy causing low accuracy. Therefore, the proposed method can be applied in a large scale-database surveillance system to search for a specific object.

• Journal of Sport and Applied Science
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• 제4권2호
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• pp.45-51
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• 2020

Purpose: The purpose of this study is to investigate how sports fans' loyalty is built via CSR activities of professional sports teams. Furthermore, the study sought to suggest the model presenting the process of developing loyalty of sport fans by teams' CSR performance. Research design, data, and methodology: For this purpose, a survey was conducted on 450 professional sports fans through the convenience sampling method. A total of 357 of the data were used for the final analysis. Based on the collected data, frequency analysis, reliability analysis, confirmatory factor analysis, and structural equation model analysis were conducted. Results: The results showed that CSR activities contribute to building a positive image of team. Regarding fan identification, team image has also a positive effect on enhancing identification. The finding has supported the notion that attitudinal loyalty is enhanced by fan identification and further attitudinal loyalty significantly influences behavioural loyalty of fans. Conclusions: The results of this study explored the function of CSR of the teams on attitudinal and behavioural outcomes, loyalty. Moreover, the study suggested the constructual model presenting its role on enhancing fans' attitudes and behaviour affecting participation and consumption. Academic and practical implications were discussed for sport marketers and practitioners.

• 전기학회논문지
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• 제58권5호
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• pp.1025-1034
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• 2009

In steel making production line, steel slabs are given a unique identification number. This identification number, Slab management number(SMN), gives information about the use of the slab. Identification of SMN has been done by humans for several years, but this is expensive and not accurate and it has been a heavy burden on the workers. Consequently, to improve efficiency, automatic recognition system is desirable. Generally, a recognition system consists of text localization, text extraction, character segmentation, and character recognition. For exact SMN identification, all the stage of the recognition system must be successful. In particular, the text localization is great important stage and difficult to process. However, because of many text-like patterns in a complex background and high fuzziness between the slab and background, directly extracting text region is difficult to process. If the slab region including SMN can be detected precisely, text localization algorithm will be able to be developed on the more simple method and the processing time of the overall recognition system will be reduced. This paper describes about the slab region localization using SIFT(Scale Invariant Feature Transform) features in the image. First, SIFT algorithm is applied the captured background and slab image, then features of two images are matched by Nearest Neighbor(NN) algorithm. However, correct matching rate can be low when two images are matched. Thus, to remove incorrect match between the features of two images, geometric locations of the matched two feature points are used. Finally, search rectangle method is performed in correct matching features, and then the top boundary and side boundaries of the slab region are determined. For this processes, we can reduce search region for extraction of SMN from the slab image. Most cases, to extract text region, search region is heuristically fixed [1][2]. However, the proposed algorithm is more analytic than other algorithms, because the search region is not fixed and the slab region is searched in the whole image. Experimental results show that the proposed algorithm has a good performance.