• Journal of Biomedical Engineering Research
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• v.15 no.4
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• pp.419-427
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• 1994

A new method of digital image analysis technique for discrimination of cancer cell was presented in this paper. The object image was the Thyroid Gland cells image that was diagnosed as normal and abnormal (two types of abnormal : follicular neoplastic cell, and papillary neoplastic cell), respectively. By using the proposed region segmentation algorithm, the cells were segmented into nucleus. The 16 feature parameters were used to calculate the features of each nucleus. As a consequence of using dominant feature parameters method proposed in this paper, discrimination rate of 91.11 % was obtained for Thyroid Gland cells.

• The Journal of the Korea Contents Association
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• v.5 no.1
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• pp.65-71
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• 2005

With the rapid improvement of the internet and information technology, digital contents containing knowledge and information resource is circulated through the internet. A circulation system based on a standardized identifier is required to share this kind of information, generated from seminars and workshops conducted in the area of science and technology and saved in the form of digital video contents. The main objective of this study is on constructing an information circulation system based on the KOI identifier to effectively share the digital video contents produced from seminars and workshops related to the area of science and technology. Furthermore, the overview and status of a standardized identifier, and the functional aspects of the system such as the methods to apply the KOI identification system on the subject and its slides of digital video contents, a digital video contents management system, a centralized identifier management system, and the methods applied for the search of digital video metadata have been suggested to support construction of the information circulation system.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.24 no.1
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• pp.65-74
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• 2024

In recent years, image processing technology has played a critical role in the field of autonomous driving. Among them, image recognition technology is essential for the safety and performance of autonomous vehicles. Therefore, this paper aims to develop a hybrid image recognition system to enhance the safety and performance of autonomous vehicles. In this paper, various image recognition technologies are utilized to construct a system that recognizes and tracks objects in the vehicle's surroundings. Machine learning and deep learning algorithms are employed for this purpose, and objects are identified and classified in real-time through image processing and analysis. Furthermore, this study aims to fuse image processing technology with vehicle control systems to improve the safety and performance of autonomous vehicles. To achieve this, the identified object's information is transmitted to the vehicle control system to enable appropriate autonomous driving responses. The developed hybrid image recognition system in this paper is expected to significantly improve the safety and performance of autonomous vehicles. This is expected to accelerate the commercialization of autonomous vehicles.

• Proceedings of the Korea Information Processing Society Conference
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• 2014.11a
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• pp.942-944
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• 2014

최근 병원정보시스템의 도입으로 병원 내 의료서비스 효율성 향상이 두드러지고 있다. 이러한 병원정보시스템의 개선으로 의료정보 통합이라는 문제가 대두되고 있으며, 이를 시도하고자 하는 움직임이 나타나고 있다. 그러나 의료정보 통합을 위한 선행 단계로 동일 환자를 찾는 문제해결이 우선시 되며, 이를 위한 환자 식별 알고리즘의 연구가 필요시 되고 있다. 대표적인 사례로 MPI(Master Patient Index) 모듈을 통해 환자의 기본 정보 및 진료 정보 등의 여러 필드를 비교하여 유사도를 산출할 수 있으나, 국내에 적합하지 않는 언어체계, 필드별 최적 가중치의 산정 등 여러 가지 문제점들을 가지고 있다. 본 논문은 이러한 MPI 등과 같은 매칭 알고리즘의 정확도를 높일 수 있는 보완적인 방법으로, 환자 필드 정보 외에 촬영한 의료 영상(MRI) 정보를 활용하여 동일 환자를 찾는 방법을 제안한다. 기존의 영상 정보만을 활용한 방법과는 달리, 의료영상의 물리적인 정보를 환자 식별 시 가장 높은 가중치를 부여하여 변하지 않는 불변의 특정 값으로 하여 높은 정확도를 검출하였다. 이러한 영상 정보를 활용한 유사도 측정 결과는 향후 환자 식별에 있어 보조적인 수단으로 활용하고자 한다.

• Proceedings of the Korea Multimedia Society Conference
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• 2002.11b
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• pp.149-154
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• 2002

운송 컨테이너의 식별자를 추출하고 인식하는 것은 컨테이너 식별자들의 크기나 위치가 정형화되어 있지 않고 외부의 잡음으로 인하여 식별자의 형태가 훼손되어 있기 때문에 어렵다. 본 논문에서는 이러한 특성을 고려하여 컨테이너 영상에 대해 Canny 에지 추출 기법을 이용하여 컨테이너의 식별자 영역을 추출하고 추출된 컨테이너 식별자 영역에서 히스토그램 방법과 윤곽선 추적 알고리즘을 결합하여 개별 식별자를 추출한다. 추출된 컨테이너 개별 식별자 인식은 ART1을 수정하여 지도 학습 방법과 결합한 개선된 자가생성 지도학습 알고리즘을 제안하여 적용한다. 실험결과에서는 제안된 컨테이너 식별자 추출 및 인식 방법이 다양한 컨테이너 영상에 대해 효율적인 것을 보인다.

• Korean Journal of Remote Sensing
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• v.38 no.3
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• pp.283-298
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• 2022

As Synthetic Aperture Radar (SAR) image can be acquired regardless of the weather and day or night, it is highly recommended to be used for Automatic Target Recognition (ATR) in the fields of surveillance, reconnaissance, and national security. However, there are some limitations in terms of cost and operation to build various and vast amounts of target images for the SAR-ATR system. Recently, interest in the development of an ATR system based on simulated SAR images using a target model is increasing. Attributed Scattering Center (ASC) matching and template matching mainly used in SAR-ATR are applied to target classification. The method based on ASC matching was developed by World View Vector (WVV) feature reconstruction and Weighted Bipartite Graph Matching (WBGM). The template matching was carried out by calculating the correlation coefficient between two simulated images reconstructed with adjacent points to each other. For the performance analysis of the two proposed methods, the Synthetic and Measured Paired Labeled Experiment (SAMPLE) dataset was used, which has been recently published by the U.S. Defense Advanced Research Projects Agency (DARPA). We conducted experiments under standard operating conditions, partial target occlusion, and random occlusion. The performance of the ASC matching is generally superior to that of the template matching. Under the standard operating condition, the average recognition rate of the ASC matching is 85.1%, and the rate of the template matching is 74.4%. Also, the ASC matching has less performance variation across 10 targets. The ASC matching performed about 10% higher than the template matching according to the amount of target partial occlusion, and even with 60% random occlusion, the recognition rate was 73.4%.

• Journal of Navigation and Port Research
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• v.47 no.6
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• pp.410-418
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• 2023

Recently, advancements and commercialization in the field of maritime autonomous surface ships (MASS) has rapidly progressed. Concurrently, studies are also underway to develop methods for automatically surveying the condition of various on-board equipment remotely to ensure the navigational safety of MASS. One key issue that has gained prominence is the method to obtain values from analog gauges installed in various equipment through image processing. This approach has the advantage of enabling the non-contact detection of gauge values without modifying or changing already installed or planned equipment, eliminating the need for type approval changes from shipping classifications. The objective of this study was to identify a dynamically changing indicator needle within noisy images of analog gauges. The needle object must be identified because its position significantly affects the accurate reading of gauge values. An analog pressure gauge attached to an emergency fire pump model was used for image capture to identify the needle object. The acquired images were pre-processed through Gaussian filtering, thresholding, and morphological operations. The needle object was then identified through Hough Transform. The experimental results confirmed that the center and object of the indicator needle could be identified in images of noisy analog gauges. The findings suggest that the image processing method applied in this study can be utilized for shape identification in analog gauges installed on ships. This study is expected to be applicable as an image processing method for the automatic remote survey of MASS.

• Journal of KIISE:Computing Practices and Letters
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• v.16 no.9
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• pp.889-897
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• 2010

Recently, a cutting-edge large-scale image database system has demanded these attributes: search with alarming speed, performs with high accuracy, archives efficiently and much more. An image identifier (descriptor) is for measuring the similarity of two images which plays an important role in this system. The extraction method of an image identifier can be roughly classified into two methods: a local and global method. In this paper, the proposed image identifier, LFH(Local Feature's Histogram), is obtained by a histogram of robust and distinctive local descriptors (features) constrained by a district sub-division of a local region. Furthermore, LFH has not only the properties of a local and global descriptor, but also can perform calculations at a magnificent clip to determine distance with pinpoint accuracy. Additionally, we suggested a way to extract LFH via GPU (OpenGL and GLSL). In this experiment, we have compared the LFH with SIFT (local method) and EHD (global method) via storage capacity, extraction and retrieval time along with accuracy.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 1998.11a
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• pp.208-213
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• 1998

사회구조가 복잡해질수록 보안(Security)의 확보는 점차 중요한 사회문제로 대두되고 있다. 보안의 문제에서 가장 중요한 것이 각 개인의 본인 여부를 정확하고 신속하게 판별할 수 있는 자동화된 인증(Authentication) 기술의 개발 여부라고 할 수 있다. 이를 위해 사용되는 개인식별은 신체의 일부를 이용한 지문인식, 두개골함성, 장문인식, 족적인식, 입술인식, 홍채인식, 골격인식 등 불변하는 신체의 특징을 이용하는 연구가 주도적이었다. 본 연구에서는 개인식별에 관한 총체적인 영상시스템을 위한 영상처리 자료를 정리한다.

• Proceedings of the Korea Contents Association Conference
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• 2010.05a
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• pp.542-544
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• 2010

본 논문은 유전 알고리즘과 신경망 알고리즘을 결합하여 내용기반 영상 식별을 하는 연구 방법을 제시한다. 특징벡터로는 색상 정보와 질감 정보를 사용하였다. 추출된 특징벡터의 집합을 제안한 모델을 통해 최적의 유효 특징벡터의 집합을 찾아 영상을 식별하고자 한다.