• Journal of Broadcast Engineering
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• v.25 no.4
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• pp.587-597
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• 2020

In this paper, we analyze the normalization that occurs when processing digital hologram and propose an optimized quantization method. In JPEG Pleno, which standardizes the compression of holograms, full complex holograms are defined as complex numbers with 32-bit or 64-bit precision, and the range of values varies greatly depending on the method of hologram generation and object type. Such data with high precision and wide dynamic range are converted to fixed-point or integer numbers with lower precision for signal processing and compression. In addition, in order to reconstruct the hologram to the SLM (spatial light modulator), it is approximated with a precision of a value that can be expressed by the pixels of the SLM. This process can be refereed as a normalization process using quantization. In this paper, we introduce a method for normalizing high precision and wide range hologram using quantization technique and propose an optimized method.

• The Journal of the Korea institute of electronic communication sciences
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• v.13 no.1
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• pp.169-174
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• 2018

There are many CCTV cameras connected to the video surveillance and monitoring center for the safety of citizens, and it is difficult for a few monitoring agents to monitor many channels of videos. In this paper, we propose an intelligent video surveillance system utilizing a safety map to efficiently monitor many channels of CCTV camera videos. The safety map establishes the frequency of crime occurrence as a database, expresses the degree of crime risk and makes it possible for agents of the video surveillance center to pay attention when a woman enters the crime risk area. The proposed gender classification method is processed in the order of pedestrian detection, tracking and classification with deep training. The pedestrian detection and tracking uses Adaboost algorithm and probabilistic data association filter, respectively. In order to classify the gender of the pedestrian, relatively simple AlexNet is applied to determine gender. Experimental results show that the proposed gender classification method is more effective than the conventional algorithm. In addition, the results of implementation of intelligent video security system combined with safety map are introduced.

• Journal of the Korea Society of Computer and Information
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• v.13 no.4
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• pp.79-86
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• 2008

As the rapid development of the Internet, the embedded images in HTML web pages nowadays become predominant. For its amazing function in describing the content and attracting attention, images become substantially important in web pages. All these images consist a considerable database. What's more, the semantic meanings of images are well presented by the surrounding text and links. But only a small minority of these images have precise assigned keyphrases. and manually assigning keyphrases to existing images is very laborious. Therefore it is highly desirable to automate the keyphrases extraction process. In this paper, we first introduce WWW image annotation methods, based on low level features, page tags, overall word frequency and local word frequency. Then we put forward our method of multi-cues integration image annotation. Also, show multi-cue image annotation method is more superior than other method through an experiment.

• Journal of the Korea Society of Computer and Information
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• v.15 no.5
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• pp.1-11
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• 2010

The success of semantic web depends largely on the semantic annotation which systematizes knowledge for the construction and production of ontology. Therefore, the efficiency of semantic annotation is very important in order to change many knowledge expressions and generate into ontology instances. In this paper, we presents a generation system of rule-based ontology instances which are produced accurately and efficiently via semantic annotation in conventional web sites. In conventional studies, the manual process is necessary for finding relevant information, comparing it with ontology, and entering information. We propose a new method that manages keyword data regarding extracted information and rule information separately. Thus, it is quite practical to extract information efficiently from various web documents by adding a small number of keywords and rules. The proposed method shows the possibility of ontology instance generation which reuses the rules and keywords from the various websites.

• Journal of the Korea Convergence Society
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• v.8 no.4
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• pp.159-165
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• 2017

The purpose of this study is to analyze the 'Scenery of the Modern City' revealed by Korean films of 1930 40s. It is assumed that films always reflect the cityscape and human activities of those days. For the analysis, a pool of 8 Korean films from 1934 till 1944 was constructed. In these films, the sceneries of the city were represented as the following: 1) The cityscape including modern buildings and speedy transportation was intentionally represented to express visually the city of Gyeongseong under the wave of modernization. 2) The western-style architectural spaces, such as apartment, mansion, department store, cafe, and hotel, were emphasized to reflect the curiosity and longing of the general public for western culture and lifestyle.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.22 no.4
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• pp.714-725
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• 1997

This paper proposes an image compression method using the wavelet transform and bit-plane coding of wavelet coefficients. The hierarchical application of wavelet transform to an image produces one low resoluation(the subband with lowest frequency) image and several high frequency subbands. In the proposed method, the low resolution image is compressed by a lossless method at 8 bits per each coefficient. However, the high frequency subbands are decomposed into 8 bit planes. With an adptive block coding method, the decomposed bit planes are effectively compressed using localized edge information in each bit plane. In addition, the propsoed method can control bit rates by selectively eliminating lessimportant subbands of low significant bit planes. Experimental results show that the proposed scheme has better performance in the peak signal to noise ratio (PSNR) and compression rate than conventional image coding methods using the wavelet transform and vector quantization.

• KIPS Transactions on Software and Data Engineering
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• v.8 no.10
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• pp.421-426
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• 2019

In this paper, we propose a method to visualize the geometric features of the contact region between proteins in a protein complex. When proteins or ligands are represented as curved surfaces with irregularities, the property that the two surfaces contact each other without intersections is called shape compatibility. Protein-Protein or Protein-Ligand docking researches have shown that shape complementarity, chemical properties, and entropy play an important role in finding contact regions. Usually, after finding a region with high shape complementarity, we can predict the contact region by using residual polarity and hydrophobicity of amino acids belonging to this region. In the research for predicting the contact region, it is necessary to investigate the geometrical features of the contact region in known protein complexes. For this purpose, it is essential to visualize the geometric features of the molecular surface. In this paper, we propose a method to find the contact region, and visualize the geometric features of it as normal vectors and mean curvatures of the protein complex.

• Communications of Mathematical Education
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• v.35 no.1
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• pp.119-136
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• 2021

We performed the research and education programs using engineering tools such as Mathematica, Microsoft Excel and GeoGebra for the students in mathematics mentorship program of the institute of science education for the gifted. We used the engineering tools to solve the problems and found the rules by observing the solutions. Then we generalized the rules to theorems by proving the rules. Mathematica, the professional mathematical computation program, was used to calculate and find the length of the repeating portion of the repeating decimal. Microsoft Excel, the spreadsheet software, was used to investigate the Beatty sequences. Also GeoGebra, the dynamic geometric software, was used to investigate the Voronoi diagram and develop the Voronoi game. Using GeoGebra, we designed the Voronoi game plate for the game. In this program, using engineering tools improved the mathematical creativity and the logical thinking of the gifted students in mathematics mentorship program.

• Journal of the Korean Society of Clothing and Textiles
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• v.25 no.9
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• pp.1681-1692
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• 2001

본 연구는 광복 이후 현재까지 첫돌 복식 변화를 시대적으로 고찰, 그 변화 양상과 영 향 요인을 규명하는 것을 목적으로 하고 있다. 연구 방법은 문헌 고찰과 사진 자료를 통한 내용 분석을 주로 하였다. 더불어 자료의 보충을 위해 첫돌 의례와 관련된 주변 인물들-가족, 기성 아동 한복 유통 상인, 상업적 사진사 등-의 면접 조사도 병행하였다. 이상의 연구를 통해 다음과 같은 결과를 얻었다. 1940년대 중반∼50년대 초에는 해방 이후 혼란과 전란으로 인한 물자의 부족으로 첫돌 의례의 명분은 남아있으나 복식 문화는 공백기를 맞는다. 1950년대 중반이후 60년대 전반기는 미국의 경제 원조와 섬유 공업 활성화로 의료의 공급이 원활하여 전기에 비해 의례적 의미를 지닌 첫돌 복식의 착용이 가능해 졌다. 전통 한복을 기본으로 한 위에 서양식 복식 품목들이 섞여서 나타나고 있다 60년대 후반에서 1970년대의 두드러진 양상은 기성복 산업 의 발달로 전문적 인 기성복 시장이 형성되었고 이는 기성복화 된 첫돌 복식의 일습 개념을 등장시키게 하였다. 또한 한복이 예복화 되는 경 향이 두드러지게 나타났던 시기로 70년대 후반의 칼라 필름의 보급은 금박과 자수와 같은 다양한 재료와 재단 방법을 사용한 장식화 된 첫돌 복식의 사용을 가속화 시 켰다. 특히 70년대 중반에 소수의 일반에게 입혀졌던 궁중복식의 하나인 당의가 소매없는 당의로 바뀌어 여아의 돌옷으로 입혀지기 시작하였다. 1980년대 전반기는 칼라 TV의 보급, 비디오 촬영의 보편화로 한복이던 양복이던 일습화 된 첫돌 복식이 대중적으로 정착하게 되었다. 후반기에는 국내의 국제적인 행사의 유치와 전통 복식 소개를 위한 전시들을 계기로 왕실 복식에 대한 관심이 고조되었다. 이로 인해 여아에게 소매없는 당의를 입히고 남아에게 용포를 입히는 유행이 가속화되었다. 또한 서양식 예복을 입히는 유행이 시작되었다. 90년대에 들어와 아기 전문사진점의 등장은 1 회적인 첫돌 의례에 한복과 서양식 예복, 일상복 등을 다양하게 착용시키는 계기를 가져오게 하였다. 이상과 같은 다양한 변화 양상에도 불구하고 첫돌을 기념하기 위해 특별한 옷을 마련하고자 했으며, 그 복식의 구성 이 전통적인 일습 개념을 꾸준히 지향해 온 경향을 보여주고 있다. 반면 최근 과열된 아동 산업은 보다 다양한 복식을 입혀서 촬영한 사진으로 특별하게 꾸민 상업적인 기념물들을 남겨주게 하고 있다. 비록 특별한 옷을 준비하여 아동에게 입히는 행위는 유사한 표현 양태이나 지나치게 많은 옷을 갈아 입히는 표현 방식은 지양되어야할 것이다

• Journal of Broadcast Engineering
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• v.18 no.2
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• pp.237-248
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• 2013

Hybrid broadcasting environment is convergence of broadcasting and communication environment. In hybrid broadcasting environment, a number of media can be delivered using both broadcasting channel and other network unlike traditional broadcast environment that is able to deliver a couple of media by the limited bandwidth. Now, starting with smart TV, hybrid broadcasting environment combining broadcasting channel and IP network is established, and a variety of services are appearing. Moreover, the services using hybrid broadcasting environment are expected to appear soon for the other smart terminals such as smart phone and tablet PC. Scene composition is one of the methods that can consume effectively a number of media delivered from hybrid broadcasting environment. Using scene composition, multiple media can be consumed through the specified presentation time and space. Therefore, in this paper, it proposes the scene composition technology that is suitable for hybrid broadcasting environment and smart terminals. However, the spatial composition and temporal composition of media using script language and style language of HTML5 might increase the complexity of processing, and cause limitation of avaliable terminals. Also, a document of HTML5 can describe only one scene. By these reason, the proposed scene composition technology extends HTML5 in order to provide the spatial and temporal composition of media and description of multiple scene through markup language. In addition, it includes the extension of HTML5 in terms of utilization in hybrid broadcasting environment. For this proposal, this paper describes the technology of HTML5 and proposed scene composition. Also, it verifies the scene composition with both implementations and experiments.