• Title/Summary/Keyword: 색개선

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TK-Indexing : An Indexing Method for SNS Data Based on NoSQL (TK-Indexing : NoSQL 기반 SNS 데이터 색인 기법)

  • Shim, Hyung-Nam;Kim, Jeong-Dong;Seol, Kwang-Soo;Baik, Doo-Kwon
    • The KIPS Transactions:PartD
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    • v.19D no.4
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    • pp.271-280
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    • 2012
  • Currently, contents generated by SNS services are increasing exponentially, as the number of SNS users increase. The SNS is commonly used to post personal status and individual interests. Also, the SNS is applied in socialization, entertainment, product marketing, news sharing, and single person journalism. As SNS services became available on smart phones, the users of SNS services can generate and spread the social issues and controversies faster than the traditional media. The existing indexing methods for web contents have limitation in terms of real-time indexing for SNS contents, as they usually focus on diversity and accuracy of indexing. To overcome this problem, there are real-time indexing techniques based on RDBMSs. However, these techniques suffer from complex indexing procedures and reduced indexing targets. In this regard, we introduce the TK-Indexing method to improve the previous indexing techniques. Our method indexes the generation time of SNS contents and keywords by way of NoSQL to indexing SNS contents in real-time.

Adaptive Retinex Algorithm using Skewness for Contrast Enhancement (대조비 개선을 위한 비대칭도 특성을 이용한 적응적인 레티넥스 방식)

  • Oh, Jong Geun;Hong, Min-cheol
    • Journal of the Institute of Electronics and Information Engineers
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    • v.53 no.10
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    • pp.77-83
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    • 2016
  • This paper presents an adaptive retinex algorithm using skewness for contrast enhancement of color images. In order to estimate the degree of low contrast of an image, skewness of luminance of an observed image is used to define a parameter, and a non-linear function is proposed to compensate the reflectance using the parameter and estimated reflectance. In addition, determination of gain and offset of the non-linear function is addressed using statistics of the estimated reflectance. The relation between an observed luminance and the compensated luminance is used to compensate color components with the reduction of computational cost. The experimental results show that the proposed algorithm has the capability to effectively improve the contrast without color distortion.

Histogram Equalization Based Color Space Quantization for the Enhancement of Mean-Shift Tracking Algorithm (실시간 평균 이동 추적 알고리즘의 성능 개선을 위한 히스토그램 평활화 기반 색-공간 양자화 기법)

  • Choi, Jangwon;Choe, Yoonsik;Kim, Yong-Goo
    • Journal of Broadcast Engineering
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    • v.19 no.3
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    • pp.329-341
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    • 2014
  • Kernel-based mean-shift object tracking has gained more interests nowadays, with the aid of its feasibility of reliable real-time implementation of object tracking. This algorithm calculates the best mean-shift vector based on the color histogram similarity between target model and target candidate models, where the color histograms are usually produced after uniform color-space quantization for the implementation of real-time tracker. However, when the image of target model has a reduced contrast, such uniform quantization produces the histogram model having large values only for a few histogram bins, resulting in a reduced accuracy of similarity comparison. To solve this problem, a non-uniform quantization algorithm has been proposed, but it is hard to apply to real-time tracking applications due to its high complexity. Therefore, this paper proposes a fast non-uniform color-space quantization method using the histogram equalization, providing an adjusted histogram distribution such that the bins of target model histogram have as many meaningful values as possible. Using the proposed method, the number of bins involved in similarity comparison has been increased, resulting in an enhanced accuracy of the proposed mean-shift tracker. Simulations with various test videos demonstrate the proposed algorithm provides similar or better tracking results to the previous non-uniform quantization scheme with significantly reduced computation complexity.

Rooibos Extract Effect on the Seborrheic Scalp Improvement of Middle-Aged Men (루이보스 추출물이 중년 남성의 지루성 두피 개선에 미치는 효과)

  • Lee, Jong-Youl;Lee, Song-Jeong;You, Seon-Hee
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.17 no.7
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    • pp.311-318
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    • 2016
  • This study conducted a 4-week clinical trial on 30 males suffering from seborrheic dermatitis and hair loss symptoms to examine the effects of rooibos extract on the seborrheic dermatitis improvement of 30-50 year old middle aged males. The comparison group used shampoo with no rooibos extract while experiment group 1 used shampoo including rooibos extracts, and experiment group 2 used shampoo and scalp enhancer including the rooibos extracts. The results showed that there were no meaningful changes on the scalps of the comparison group while experiment group 2, which used both shampoo and scalp enhancer including rooibos, showed better improvement on seborrheic dermatitis than experiment group 1 which only used shampoo including rooibos. These results imply that shampoo and scalp enhancer including rooibos extracts effectively improve the oil-moisture balance on seborrheic dermatitis and effectively deals with scalp itchiness redness and the color tone of the scalp, suggesting its use in scalp cosmetics that include antioxidation activation elements, which are effective in improving seborrheic dermatitis.

Analytical Study on the Index Terms in the Theological Journals (신학 학술지의 색인어에 관한 연구)

  • Yoo, Yeong-Jun
    • Journal of Korean Library and Information Science Society
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    • v.40 no.3
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    • pp.137-156
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    • 2009
  • This study has analyzed the uncontrolled index terms in the theological journal, which were assigned by the authors and the LCSH subject headings in their form and meaning, compared to the standards of index terms and proposed much more sophisticated indexing system. In the uncontrolled index terms, noun phrases and compound terms are analyzed, this study found that indexers have to have theological knowledge and indexing techniques in order to assign more precise index terms. In the LCSH, unnecessary index terms and parenthetical qualifiers were analyzed. As a result of it, this study identified that the problems of inconsistency and errors raised from the basic index structure of LCSH.

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Search scheme for parallel spatial index (병렬 공간 색인을 위한 검색 기법)

  • Seo, Young-Duk
    • Journal of Korea Spatial Information System Society
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    • v.7 no.2 s.14
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    • pp.81-89
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    • 2005
  • Declustering and parallel index structures are important research areas to improve a performance of databases. Previous researches proposed several distribution schemes for parallel R-trees, however there is no search schemes to be suitable for the index. In this paper, we propose schemes to improve the performance of range queries for distribute parallel indexes. The proposed schemes use the features that a parallel disk can read multiple nodes from various disks. The proposed schemes are verified using various implementations and performance evaluations. We propose new schemes which can read multiple nodes from multiple disks in contrast that to the previous schemes which can read a node from disk. The experimental evaluation shows that the proposed schemes give us the performance improvement by 40% from the previous researches.

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Image Dependent Color Quantization Algorithm Based Histogram (히스토그램 기반 영상 의존적 칼라 양자화 알고리즘)

  • 권동진;유성필;박원배;곽내정;안재형
    • Proceedings of the Korea Multimedia Society Conference
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    • 2001.11a
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    • pp.126-131
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    • 2001
  • 현재 널리 사용되는 hand-held형 단말기들은 영상을 표현할 때 제한된 수의 칼라만으로 표현할 수 있다. 따라서 자연색 칼라 팔레트를 이용하여 단말기에 나타낼 때 최적의 칼라 팔레트를 구현하는 것과 원영상의 각각의 칼라로부터 팔레트 칼라로 최적으로 정합 시키는 것이 요구된다. 본 논문에서는 효율적으로 칼라 팔레트를 설계하는 히스토그램 기반 영상 의존적 스칼라 양자화 알고리즘을 제안한다. 제안 알고리즘은 칼라 우선순위 결정 부분과 양자화 부분으로 구성되며 양자화 후 ANC(Adaptive Neighborhood-Clustering) 알고리즘을 적용하여 성능을 개선한다. 이 방법은 자연색 칼라 영상을 적은 비트로 표현했음에도 출력 영상이 인간의 눈에 적합하다.

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Dependence of color reproduction on screen mode of DLP projection TV (DLP 프로젝션 TV의 화면모드별 색특성 분석)

  • 김태희;김동환;송영란;김문철
    • Proceedings of the Optical Society of Korea Conference
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    • 2003.02a
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    • pp.268-269
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    • 2003
  • 삼성전자는 LCD 방식에 이은 3세대 프로젝션 모델로 평가받는 DMD (Digital Micromirror Device) 기술을 채용한 43‘’, 50‘’, 61‘’ DLP (Digital Light Processing) 프로젝션 TV를 개발 시판하고 있다. DMD 기술이란 921,600개의 미세한 거울들이 신호에 따라 반사각도를 조절하며 이미지를 구현하는 기술이다. 삼판식 프로젝션 시스템의 단점을 개선, 경박단소와 저가격화를 위하여 단판식을 이용하는 DLP 프로젝션 TV 의 경우 Red, Green, Blue 로 이뤄진 칼라휠을 회전시킴으로서 DMD 위에 연속적으로 삼색의 영상을 재생하여 색을 분리 합성한다. (중략)

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Design of a query index procedure for real-time monitoring for medical services (실시간 의료 모니터링 서비스를 위한 질의 색인 구조)

  • Choe, Ok-Ju;Maeng, Bo-Yeon;Lee, Min-Su
    • Proceedings of the Korea Information Processing Society Conference
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    • 2009.11a
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    • pp.225-226
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    • 2009
  • 최근 센서를 이용한 의료 분야로의 유비쿼터스 시스템 및 서비스 연구가 활발히 진행되고 있다. 그러나 의료 분야 서비스의 기본적 전제인 WBAN 환경에서의 기존의 모니터링 시스템은 매우 수동적이다. 이를 개선해 스트림 데이터에 대해 보다 효율적인 모니터링 시스템을 구축하기 위한, 우선 순위를 표현하기 위한 큐(Queue)와 각 속성에 대한 질의로 구성된 레벨 트리(Level Tree)로 이어지는 질의 색인 구조에 대해 논하고자 한다.