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영역 기반 영상 검색을 위한 다중클래스 피드백 알고리즘
고병철,남재열,Ko Byoung-Chul,Nam Jae-Yeal 한국정보처리학회 2006 정보처리학회논문지B Vol.13 No.4
본 논문에서는 영역기반 영상검색의 성능 향상을 위한 피드백 알고리즘으로 다중 클래스를 갖는 확률적 신경망(Probabilistic Neural Networks)을 이용한 방법론을 제안하고 이를 영역기반 영상 검색 시스템인 FRIP(Finding Regions In the Pictures) 시스템에 적용하였다. 본 논문에서 제안하는 피드백 알고리즘은 특정 벡터가 독립적이라는 가정을 할 필요가 없으며 보다 상세한 분류를 위해 추가적인 클래스들을 추가할 수 있도록 허용하고 있다. 또한 단지 4개 층(layer)만을 가지고 있음으로 학습을 위한 계산시간이 적게 든다는 장점이 있다. 추가적으로 다음단계에서의 성능 향상을 위해 분류 단계에서 사용자의 이전 피드백 행동을 모두 히스토리(history)로 모두 기억시켜 놓고 다음 단계를 위한 가중치 학습을 위해 사용하도록 한다. 히스토리를 사용함으로써 제안하는 알고리즘은 사용자의 주관적 의도를 보다 정확하게 파악 할 수 있을 뿐만 아니라 학습을 위해 이전 단계만을 사용 했을 때 발생할 수 있는 성능 감소를 막을 수 있다. 본 논문에서는 Corel-photo CD에서 3000장의 자연 영상을 무작위로 추출하여 기존의 방법론들과 제안하는 방법론의 성능을 측정하여 본 논문에서 제안하는 방법론이 성능이 우수함을 증명하였다. In this paper, we propose a new relevance feedback algorithm using Probabilistic Neural Networks(PNN) while supporting multi-class learning. Then, to validate the effectiveness of our feedback approach, we incorporate the proposed algorithm into our region-based image retrieval tool, FRIP(Finding Regions In the Pictures). In our feedback approach, there is no need to assume that feature vectors are independent, and as well as it allows the system to insert additional classes for detail classification. In addition, it does not have a long computation time for training because it only has four layers. In the PNN classification process, we store the user's entire past feedback actions as a history in order to improve performance for future iterations. By using a history, our approach can capture the user's subjective intension more precisely and prevent retrieval performance errors which originate from fluctuating or degrading in the next iteration. The efficacy of our method is validated using a set of 3000 images derived from a Corel-photo CD.
각도 히스토그램을 이용한 빠른 최소 오차 사각형 근사화 방법
고병철 ( Byoung Chul Ko ),박준오 ( Jun Oh Park ),김덕연 ( Deok Yeon Kim ),남재열 ( Jae Yeal Nam ) 한국화상학회 2011 한국화상학회지 Vol.17 No.3
A fast and efficient minimum-bounding rectangle estimation of an image object is proposed for industrial applications such as object inspection and classification. To detect the minimum-bounding rectangle of an object, we estimate the directions of its major and minor axes by using the proposed angular histogram with n sampled edge points, instead of using the entire boundary. The final bounding rectangle is that which results in the minimum error when the four vertices are rotated just twice amongst three candidate bounding rectangles. Experiments are carried out to evaluate the performance of the proposed method, and show that it can detect the minimum-bounding rectangle of an object in a fast and efficient manner.
고병철(Byoungchul Ko) 한국종교학회 2012 宗敎硏究 Vol.67 No.-
The purpose of this research is to investigate the statement of educational objectives(S.E.O.) about 〈Religion〉 according to 6th. and 7th. national curriculum standard, and to recommend a suitable alternative. Through the process of this research, I tried to suggest the importance of communicability in the S.E.O. of 〈Religion〉 curriculum. To achieve these purposes, in chapter 2, in the title of ‘the statement of objectives in the 〈Religion〉 curriculum’ I analyzed how objectives in religious subject matters education was stated in the 6th. and 7th. national curriculum standard. In chapter 3, in the title of ‘discussions of the S.E.O. and it’s implications’, I examined discussions about instructional objectives of three scholars(R. W. Tylor, R. F. Mager and N. E. Gronlund), and emphasized the importance of the communicability between staters and learners. And, in chapter 4, in the title of ‘analysis of S.E.O. in 〈Religion〉 curriculum’ I examined various problems about the statement of S.E.O. in 〈Religion〉 curriculum, and suggested communicability theory for the effective S.E.O. that should be pursued in the near future.
고병철(Byoungchul Ko) 한국종교학회 2012 宗敎硏究 Vol.69 No.-
The purpose of this research is to investigate histories of ancestral rites in Won-Buddhism, and to understand its characters. Main contents that discussed on this research are histories of ancestral rites, logics of the Chondo(薦度), and various experiences including the recognition of soul in Won-Buddhism. To achieve these purposes, in chapter 2, in the title of `ancestral rites and Chondo` I analyzed histories of ancestral rites in Won-Buddhism, and stated that the Chondojae ritual gradually emphasized. In Chapter 3, in the title of `emphasis of Chondojae ritual`, I emphasized that the history of Chondojae ritual was extended farther in histories of ancestral rites of Won-Buddhism. And, in chapter 4, in the title of `Chondojae ritual and soul`, I examined logics and structures of various stories of Chondo. And I suggested that the core of Chondojae ritual was belief in the immortality of the soul.
고병철(Byung Chul Ko) 한국종교학회 2013 宗敎硏究 Vol.73 No.-
The purpose of this study is that to examine the relationship of faith and rituals in religion, checking the contents and lists of rituals of the Cheontae Order in Korea. And, by this, I try to understand the direction of faith which the Cheontae Order aims. For this reason, in the first chapter, examining the main literatures and histories of the Cheontae Order, I pointed out that it is necessary to study rituals of the Cheontae Order, In the second chapter, classifying the main lists of ritual of the Cheontae Order, I examined the difference between the other Buddhist organizations and the Cheontae Order. Then, in Chapters 3 and 4, I examined the spaces and contents of rituals in the Cheontae Order. And, by this, I pointed out that faith of the cheontae Order is concentrated in Avalokitesvara Bodhisattva (the Goddess of Mercy) and memory of the Cheontae Order` founder. As a result, the Cheontae Order aims to faith on Avalokitesvara Bodhisattva and the Cheontae Order` founder constructing various spaces and contents of rituals. And, through these, the Cheontae Order has been making a feature that was distinguished from other religions. Viewed from this point, rituals are a strategic tool to maintain and enhance the self-identity of the Cheontae Order. This research was done through several interviews and field survey, as well as literatures including previous researches. I expect to make this research a small contribution to understand the rituals of the Cheontae Order.