• 제목/요약/키워드: color matching function

검색결과 45건 처리시간 0.035초

동적계획법을 이용한 컬러 스테레오 정합 (Color Stereo Matching Using Dynamic Programming)

  • 오종규;이찬호;김종구
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2000년도 추계학술대회 논문집 학회본부 D
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    • pp.747-749
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    • 2000
  • In this paper, we proposed color stereo matching algorithm using dynamic programming. The conventional gray stereo matching algorithms show blur at depth discontinuities and non-existence of matching pixel in occlusion lesions. Also it accompanies matching error by lack of matching information in the untextured region. This paper defines new cost function makes up for the problems happening in conventional gray stereo matching algorithm. New cost function contain the following properties. I) Edge points are corresponded to edge points. ii) Non-edge points are corresponded to non-edge points. iii) In case of exiting the amount of edges, the cost function has some weight in proportion to path distance. Proposed algorithm was applied in various images obtained by parallel camera model. As the result, proposed algorithm showed improved performance in the aspect of matching error and processing in the occlusion region compared to conventional gray stereo matching algorithms.

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분할된 색공간에서 비선형 다중회귀분석법을 이용한 스캐너 켈리브레이션에 관한 연구 (A study on scanner calibration method using nonlinear regression analysis in sub-divided color space)

  • 김나나;구철회
    • 한국인쇄학회:학술대회논문집
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    • 한국인쇄학회 2000년도 추계학술발표회 논문집
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    • pp.0.2-0
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    • 2000
  • Most important step for the color matching in scanner is the color coordinate transformation from the scanner RGB space to device independent uniform color space. A variety of color calibration technologies have been developed for input device. Linear or nonlinear matrices have been conveniently applied to correct the color filter\`s mismatch with color matching function in scanners. The color matching accuracy is expected to be further improved when the nonlinear matrices are optimized into subdivided smaller color spaces than in single matrix of the entire color space. This article proposed the scanner calibration method using subspace division regression analysis and it were compared with conventional method.

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분활된 색공간에서 비선형 다중회귀 분석법을 이용한 스캐너 캘리브레이션에 관한 연구 (A study on scanner calibration method using nonlinear regression analysis in sub-divided color space)

  • 김나나;구철희
    • 한국인쇄학회지
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    • 제19권1호
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    • pp.4-16
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    • 2001
  • Most important step for the color matching in scanner is the color coordinate transformation from the scanner RGB space to device independent uniform color space. A variety of color calibration technologies have been developed for input device. Linear or nonlinear matrices have been conveniently applied to correct the color filter's mismatch with color matching function in scanners. The color matching accuracy is expected to be further improved when the nonlinear matrices are optimized into subdivided smaller color spaces than in single matrix of the entire color space. This article proposed the scanner calibration method using subspace division regression analysis and it were compared with conventional method.

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칼라 맞춤 및 분배 기능을 가진 컴퓨터 자동화 시스템의 퍼지 제어 (Fuzzy Control of Computer Automatic System with Color Matching and Dispensing Functions)

  • 한일석;류상문;임태우;안태천
    • 한국지능시스템학회:학술대회논문집
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    • 한국퍼지및지능시스템학회 2000년도 춘계학술대회 학술발표 논문집
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    • pp.146-149
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    • 2000
  • In this paper, Computer Colour Matching and Kitchen System (CCMKS) is developed on the basis of delphi package and one-chip processor with fuzzy-PID control. CCMKS will be widely used in the colour dyeing industry as an integrated colour matching and dispensing system which have more advantages than the conventional matching or dispensing system, when controlling the real dyeing processes. Delphi is utilized in making database and search/matching routes. The developed matching function reduces the search and matching time to about one third. One-chip processor is designed and manufactured for the distributed control of three-phase induction motors. Fuzzy-PID control is applied to the speed control of three-phase induction motors for a very precise weight of colour at CCMKS. The developed kitchen function decreases the dispensing time to about one twentieth. The experimental results show CCMKS has more excellent search time, more precise weight and much high fidelity than conventional colour matching or dispensing system, in the performance.

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등색함수 필터의 설계와 이를 이용한 LCD 평판 디스플레이의 색채 측정에 대한 오차 분석 (Design of Color Matching Filters and Error Analysis in Colorimetric Measurement of LCD Flat Panel Display Using the Filters)

  • 전지호;조재흥;박승남;박철웅;이동훈;정기룡
    • 한국광학회지
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    • 제18권1호
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    • pp.1-7
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    • 2007
  • 필터와 검출기로 구성된 필터식 색채계의 분광감응도는 국제조명위원회(Commission Internationale de I'Eclairage, CIE)에서 정의한 등색함수와 일치해야 한다. 본 연구에서는 정확도가 높은 색채계에 적용할 수 있는 등색함수 $\bar{x},\;\bar{y}\;\bar{z}$에 대한 필터를 상용화된 색필터를 조합하여 제작할 수 있도록 설계하였다. 특히 등색함수 $\bar{x}$는 두 개의 투과대역을 가지고 있기 때문에 파장 영역이 다른 2 개의 필터로 분리하여 실현하였다. 설계에는 색필터의 두께를 곡선 맞춤변수로 두고 비선형 최소제곱법으로 필터의 품질지수 $f{_1}'$ 값을 최적화하는 프로그램을 개발하여 사용하였다. 그 결과 모든 필터의 $f{_1}'$ 값이 3 % 이하가 되도록 설계할 수 있었으며, $\bar{y}$ 등색함수 필터를 실제로 제작하여 $f{_1}'$ 측정값이 2.8 %임을 검증하였다. 또한 설계한 등색함수 필터로 색채계를 제작하여 LCD 평판 디스플레이의 색채 측정에 사용할 경우 발생하는 계통오차도 산출하였다.

Color imaging and human color vision

  • Yaguchi, Hirohisa
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
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    • pp.1154-1157
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    • 2009
  • This template provides you with an example of the The CIE Color Appearance Model (CIECAM02) is now widely used for various digital imaging systems including digital displays. The CIECAM02 were intended to be an empirical model, however, some aspects of the model are closely related to the human color vision mechanism. This paper will discuss the relationship between human color vision and color imaging.

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ShadepilotTM을 이용한 색조 선택 (Clinical Color Match using ShadepilotTM)

  • 신수연
    • 구강회복응용과학지
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    • 제23권3호
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    • pp.219-225
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    • 2007
  • The ability of a dentist to select and communicate an acceptable shade match to a dental laboratory may be the most important factor in esthetic restorative dentistry. However, shade matching is a very complex situation. In this study, an attempt was made to compare and evaluate the conventional visual assessment and colorimetric analysis in clinical shade matching. 20 patients were selected and their maxillary central incisors shade were measured by Vita classic shade guide, using $Shadepilot^{TM}$ and ShadeEye $NCC^{(R)}$. The results indicate that there is much variation in the shade selection by visual and instrumental methods.

ShadepilotTM을 이용한 색조 선택 (Clinical Color Match using ShadepilotTM)

  • 신수연
    • 구강회복응용과학지
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    • 제23권2호
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    • pp.131-137
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    • 2007
  • The ability of a dentist to select and communicate an acceptable shade match to a dental laboratory may be the most important factor in esthetic restorative dentistry. However, shade matching is a very complex situation. In this study, an attempt was made to compare and evaluate the conventional visual assessment and colorimetric analysis in clinical shade matching. 20 patients were selected and their maxillary central incisors shade were measured by Vita classic shade guide, using $Shadepilot^{TM}$ and ShadeEye $NCC^{(R)}$. The results indicate that there is much variation in the shade selection by visual and instrumental methods.