• 제목/요약/키워드: Colour difference

검색결과 85건 처리시간 0.024초

AUTOMATIC BUILDING EXTRACTION BASED ON MULTI-SOURCE DATA FUSION

  • Lu, Yi Hui;Trinder, John
    • 대한원격탐사학회:학술대회논문집
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    • 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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    • pp.248-250
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    • 2003
  • An automatic approach and strategy for extracting building information from aerial images using combined image analysis and interpretation techniques is described in this paper. A dense DSM is obtained by stereo image matching. Multi-band classification, DSM, texture segmentation and Normalised Difference Vegetation Index (NDVI) are used to reveal building interest areas. Then, based on the derived approximate building areas, a shape modelling algorithm based on the level set formulation of curve and surface motion has been used to precisely delineate the building boundaries. Data fusion, based on the Dempster-Shafer technique, is used to interpret simultaneously knowledge from several data sources of the same region, to find the intersection of propositions on extracted information derived from several datasets, together with their associated probabilities. A number of test areas, which include buildings with different sizes, shape and roof colour have been investigated. The tests are encouraging and demonstrate that the system is effective for building extraction, and the determination of more accurate elevations of the terrain surface.

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Detection of a Point Target Movement with SAR Interferometry

  • Jun, Jung-Hee;Ka, Min-ho
    • 대한원격탐사학회지
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    • 제16권4호
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    • pp.355-365
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    • 2000
  • The interferometric correlation, or coherence, is calculated to measure the variance of the interferometric phase and amplitude within the neighbourhood of any location within the image at a result of SAR (Synthetic Aperture Radar) interferometric process which utilizes the phase information of the images. The coherence contains additional information that is useful for detecting point targets which change their location in an area of interest (AOI). In this research, a RGB colour composite image was generated with a intensity image (master image), a intensity change image as a difference between master image and slave image, and a coherence image generated as a part of SAR interferometric processing. We developed a technique performing detection of a point target movement using SAR interferometry and applied it to suitable tandem pair images of ERS-1 and ERS-2 as test data. The possibility of change detection of a point target in the AOI could be identified with the technique proposed in this research.

경추 도수교정이 추골동맥 비대칭군의 혈류속도와 혈류량에 미치는 영향 (Effect of Cervical Manipulation on Blood Velocity and Flow in Subjects with Asymmetric Vertebral Artery)

  • 김한일;김호봉
    • 대한정형도수물리치료학회지
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    • 제19권2호
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    • pp.31-37
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    • 2013
  • Background: The purpose of this study was to identify the effects of cervical manipulation for improve blood velocity and flow in the subjects with asymmetric vertebral artery. Methods: Twenty-four subjects on asymmetric vertebral artery with right side have less blood flow than left side participated in this study for apply to non-specific cervical manipulation on lower portion. Measurement method were using duplex ultrasound with colour doppler imaging for blood velocity and flow on left and right vertebral artery. Results: Compared changes of blood velocity and flow on unilateral after the cervical manipulation, the left blood velocity decreased significantly (p<.01) and the right blood velocity increased significantly (p<.01). The left blood flow no significant changes and the right blood flow increased significantly (p<.01). Compared changes of blood velocity and flow on bilateral, the left and right blood velocity and flow made significantly difference on pre-manipulation (p<.01). However, both side no significantly difference on post-manipulation. Conclusions: These findings suggest that the non-specific cervical manipulation took effect for improve blood velocity and flow in the subjects with asymmetric vertebral artery. Therefore, therapeutic approaches for improve to asymmetric vertebral artery should be consider non-specific cervical manipulation.

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노년층 여성들의 의복구매유형에 따른 의복구매불만 (The Anxiety in Purchasing According to Clothes Buying Style in Elderly Women)

  • 배현숙
    • 대한가정학회지
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    • 제35권1호
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    • pp.373-388
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    • 1997
  • This research was intended to understand the degree of variety in elderly women by was of classifying the type of clothing purchase's according to the degree of anxiety when they buy clothes. Samples were 285 elderly women who are aged over 55 dwelling in Busan Meropolitan city and this research is made available by the method of the questionnaire interview. The data was analyzed using reliability ANOVA regression Scheffe Test and correlation. The results of the study were the followings 1. The most important factors in the type of clothing purchase's of elder women are the styles disparity of age is represented similarly except the styles of a Brand Loyal tat ranked highest were among the age group 60-64. 2, The factor of difference in clothing purchase's according to degree of education are Brand loyal Cautious Impulsive Ecologists and Experimenters and the style of clothes buying according to activity of leisure are Brand Loyal and conformists. The factor of difference in clothing buying according to shopping companion are Planners Experiments Conformists Impulsive and Persuasible and the item represents difference according to payer for clothing marked all style of clothes buying and similarity except Impulsive and Style-Conscious, 3, The highly correlated item in the degree of education and activity of leisure in the context of the correlated item concerning about shopping companion and payer for clothes are Experimenters impulsive and Ecologists. The colthing anxiey which is highly related is the degree of education and the activity of leisure and the anxiety in masterial colour and self-harmony and the anxiety of colthing purchase's which is highly correlated in clothing purchase's companion and payer for clothin proved the priceand the anxiety of decision-making 4. Economy-Minded Experimenters Impulsive Planners and Style-Conscious represents all of the difference in all items in clothing purchase's Conformists represents anxiety to all items except the anxiety in clothing administration, Cautious and Ecologists represents the differences only for the anxiety in clothing administration,. But Brand-Loyal and Persuasible feels no anxiety in clothing purchase. 5. The most explicable independent variable based upon the analysis of regression in anxiety of colthing purchase is Economy-Minded and the next is Conformist Experiments Planners Style-Conscious Impulsive and so on.

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GOCI와 Landsat OLI 영상 융합을 통한 적조 탐지 (Red Tide Detection through Image Fusion of GOCI and Landsat OLI)

  • 신지선;김근용;민지은;유주형
    • 대한원격탐사학회지
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    • 제34권2_2호
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    • pp.377-391
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    • 2018
  • 광역범위에 대한 적조의 효율적인 모니터링을 위하여 원격탐사의 필요성이 점차 증가하고 있다. 하지만 기존 연구에서는 다양한 센서 중 해색 센서만을 위한 적조 탐지 알고리즘 개발에만 집중되어 있는 실정이다. 본 연구에서는 위성 기반 적조 모니터링의 한계로 지적되고 있는 탁도가 높은 연안역의 적조 탐지와 원격탐사 자료의 부정확성을 개선하고자 다중센서의 활용을 제시하고자 한다. 국립수산과학원 적조속보 정보를 바탕으로 적조 발생해역을 선정하였고, 해색 센서인 GOCI 영상과 육상 센서인 Landsat OLI 영상을 이용하여 공간적인 융합과 분광기반 융합을 시도하였다. 두 영상의 공간 융합을 통하여, GOCI 영상에서 관측 불가능하였던 연안지역의 적조와 Landsat OLI 영상의 품질이 낮았던 외해역의 적조 모두 개선된 탐지결과 획득 가능하였다. Feature-level과 rawdata-level로 나누어 진행된 분광 융합 결과, 두 방법에서 도출된 적조 분포 양상은 큰 차이를 보이지 않았다. 하지만 feature-level 방법에서는 영상의 공간해상도가 낮을수록 적조 면적이 과대추정되는 경향이 나타났다. Linear spectral unmixing 방법으로 픽셀을 세분화한 결과, 적조 비율이 낮은 픽셀의 수가 많을수록 적조 면적의 차이는 심화되는 것으로 나타났다. Rawdata-level의 경우Gram-Schmidt가 PC spectral sharpening 기법보다 다소 넓은 면적이 추정되었지만, 큰 차이는 나타나지 않았다. 본 연구에서는 해색 센서와 육상 센서의 공간 융합을 통해 외해뿐만 아니라 탁도가 높은 연안의 적조 역시 탐지가 가능함을 보여주었고, 다양한 분광 융합 방법을 제시함으로써 더욱 정확한 적조 면적 추정 방법을 제시하였다. 이 결과는 한반도 주변의 적조를 더욱 정확하게 탐지하고, 적조를 효과적으로 제어하기 위한 대응대책 수립을 결정하는데 필요한 정확한 적조 면적 정보를 제공할 수 있을 것으로 기대된다.

포항지역(浦項地域) 제(第)3기층(紀層) 퇴적암(堆積岩)중 화학적풍화작용(化學的風化作用)이 결토광물조성(結土鑛物組成), 화학조성(化學組成), 암색(岩色) 및 미화석(微化石) 산출빈도(産出頻度)에 미치는 영향 (Variations of Clay Mineral Assemblage, Colour, and Microfossil Abundance in the Tertiary Sediments from the Pohang Area During Chemical Weathering)

  • 문희수;윤혜수;민경덕;이현구;이종천
    • 자원환경지질
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    • 제23권2호
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    • pp.201-213
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    • 1990
  • 제3기 포항분지의 퇴적암류의 외견상의 특징은 비록 한 충준내라 할지라도 산출지, 즉 노두에 따라 다양하게 나타난다. 이러한 현상은 주로 화학적풍화작용에 의한 화학조성 및 광물조성의 변화와 미화석 산출빈도의 변화에 기인된 것으로서, 이는 암층서, 생층서 및 지질경계를 설정하는데 많은 혼동을 유발하는 원인이 되었다. 화학적 풍화작용이 제3기 포항분지의 퇴적암류에 미친 영향을 지화학적, 광물학적 및 미화석 산출빈도와 관계시켜 풍화심도에 따른 변화를 체계적으로 연구 였고, 지질현상 해석에의 적용을 고찰하였다. 본 역의 화학적 풍화작용에 대한 감응력은 광물조성과 조직의 차이에 따라 변화를 보였고, 풍화대에서의 용탈현상이 미약한 것은 침식속도가 상대적으로 빠른 결과로 해석된다. 외견상의 가장 현저한 변화인 암색의 변화는 주로 유기물의 분해에 의한 결과이며, 미화석의 산출 또한 풍화 심도에 따른 큰 변화를 보여 풍화대 상부, 즉, 산화대에서는 산출이 극히 제한되고 특히 풍화작용의 감응력이 상대적으로 큰 두호층의 경우 그 영향은 더욱 현저하다. 그 영향은 지표로부터 7-10m에 이르러 포항분지의 경우, 지표시료를 이용한 암층서 및 생층서 연구시 이들자료 해석에 큰 제한이 있고 주의가 필요함을 지시한다.

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폐MDF를 이용한 염색재생섬유 제조 (Manufacture of Dyed Recycling Wood Fiber Using Waste MDF)

  • 주선경;노정관
    • Journal of the Korean Wood Science and Technology
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    • 제45권3호
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    • pp.297-307
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    • 2017
  • 폐MDF 재생섬유를 인테리어 소품 제조용 원료로 이용하기 위해 MDF 제조용 리기다소나무 버진섬유와 MDF를 제조한 후 재해섬한 재생섬유에 대해 빨강, 노랑 및 파랑색 계열의 Bis-monochlorotriazine (MCT)계와 Vinyl sulfone(VS)계의 반응성염료, Anthraquinone계의 배트염료, Diazo계열의 직접염료 및 치자와 소목의 천연염료에 의한 염색 특성 및 일광견뢰도를 검토하였다. 염색 전의 버진섬유와 재생섬유의 색상은 각각 4.2YR과 4.4YR로 약간의 적색기가 있는 황색을 나타내고 있었으며, 재생섬유가 버진섬유에 비해 $L^*$의 값이 작아 약간 더 어두웠다. 적, 청, 황색계의 MCT계와 VS계의 반응성염료, 배트 염료, 직접염료 모두 버진섬유와 재생섬유에 관계없이 염색은 매우 양호하게 잘 이루어졌다. 재생섬유가 버진섬유보다 염착량은 약간 높았고, $L^*$와 V의 값은 약간 감소하였으나, 큰 차이는 없었다. 일광견뢰도는 염료에 따라 약간의 차이는 있으나 버진염색섬유가 재생염색섬유보다 더 큰 색차를 보이고 있어 불량하였다. 소목으로 염색한 재생섬유와 버진섬유의 색상은 각각 4.4YR과 4.0YR로 염색 전의 미염색 섬유와 거의 차이가 없었으나, 치자로 염색한 섬유의 색상은 각각 7.4YR과 6.9YR로 황색계의 반응성염료, 배트염료 및 직접염료보다 큰 색차를 보여 염색성은 우수하였으나 일광견뢰도는 불량하였다.

A MULTI-WAVELENGTH STUDY OF PAH-SELECTED STARBURST GALAXIES

  • Takagi, T.;Matsuhara, H.;Wada, T.;Ohyama, Y.;Oyabu, S.
    • 천문학논총
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    • 제27권4호
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    • pp.321-324
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    • 2012
  • Using extensive mid-IR datasets from AKARI, i.e. 9-band photometry covering the wavelength range from $2{\mu}m$ to $24{\mu}m$ and the unbiased spectroscopic survey for sources with $S_{\nu}$($9{\mu}m$)>0.3 mJy, we study starburst galaxies specifically at the redshift of z ~ 0.5, whose mid-IR spectra are clearly dominated by the PAH emission features. PAH-selected galaxies, selected with extremely red mid-IR colour due to PAHs, have high rest-frame PAH-to-stellar luminosity ratios, comparable to those in the most active regions in nearby starburst galaxies. Thus, they seem to have active starburst regions spreading over the whole body. Furthermore, some of PAH-selected galaxies are found to have peculiar rest-frame 11-to-$8{\mu}m$ flux ratios, which is systematically smaller than nearby starburst/AGN spectral templates. This may indicate a systematic difference in the physical condition of ISM between nearby and distant starburst galaxies.

Pharmacognostical Evaluation of an Antioxidant Plant - Acorus calamus Linn

  • Govindarajan, Raghavan;Agnihotri, Adarsh Kumar;Khatoon, Sayyada;Rawat, Ajay Kumar Singh;Mehrotra, Shanta
    • Natural Product Sciences
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    • 제9권4호
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    • pp.264-269
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    • 2003
  • The rhizome of Acorus calamus Linn. is commonly known as "Vacha" in indigenous systems of medicine. It is distributed in marshy tracts of Kashmir, Sirmaur (Himachal Pradesh), Manipur and the Naga hills. It is regularly cultivated in Koratagere Taluk in Karnataka and other parts of India. This study deals with the detailed pharmacognostical evaluation of the dried rhizomes of Acorus calamus collected from DehraDun (Uttaranchal), Lucknow (Uttar Pradesh). The commercial sample procured from Delhi market was also evaluated to observe the difference between collected and market samples. Dried rhizome is vertically compressed, pale yellow to dark brown and occasionally orangish brown in colour. Transverse section showed two distinct region with scattered, concentric vascular bundles surrounded by fibrous bundle sheath. Some vascular bundles just beneath the endodermis devoid of bundle sheath. Though the botanical and physico-chemical characters of all the samples were quite similar but some variations were observed in High Performance Thin Layer Chromatography (HPTLC) fingerprint profile, the essential oil content and total percentage of asarone which was found to be highest in Lucknow and lowest in Delhi market sample. These variations may be explained due to some edaphic factors or storage conditions. An attempt was also made to test antioxidant activity (in vitro) and it was found to be 88% at 0.2 g/ml concentration.

The Storytelling Rhythms of Chinese and Korean Films

  • WU, JUAN
    • International Journal of Advanced Culture Technology
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    • 제8권4호
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    • pp.58-63
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    • 2020
  • In literature it is not only the meaning of words which matters, but also their texture matters i.e. their rhythm, colour and style are relevant and none of these natures can be reduced to an item of information. The texture is also important in film languages, especially the rhythm. In order to make the storytelling rhythm visible, a new concept of 'the Rhythm Chart Analysis Method (RCAM)' has been devised in this research and used for analysis. By analyzing original films and remakes in Korean and Chinese, one can find out that different countries have different storytelling rhythms i.e. the same story can be told in different rhythms. The central idea in Korean films is portrayed at the end, which is a typical characteristic of Korean films. And as the defining moment does not occur suddenly the audience can naturally get immersed into the story. But Chinese films communicate with the audience in a more direct way. It directly mentions characteristics of each actor in such a way that it is telling rather than showing. The information of the movie is given to the audience in the initial stages of the movie. Rhythm is as important as story and information. And through this we can find out the cultural differences from the different storytelling rhythms.