• Title/Summary/Keyword: Edge Blending

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Visible and NIR Image Synthesis Using Laplacian Pyramid and Principal Component Analysis (라플라시안 피라미드와 주성분 분석을 이용한 가시광과 적외선 영상 합성)

  • Son, Dong-Min;Kwon, Hyuk-Ju;Lee, Sung-Hak
    • Journal of Sensor Science and Technology
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    • v.29 no.2
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    • pp.133-140
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    • 2020
  • This study proposes a method of blending visible and near infrared images to enhance edge details and local contrast. The proposed method consists of radiance map generation and color compensation. The radiance map is produced by a Laplacian pyramid and a soft mixing method based on principal component analysis. The color compensation method uses the ratio between the composed radiance map and the luminance channel of a visible image to preserve the visible image chrominance. The proposed method has better edge details compared to a conventional visible and NIR image blending method.

A Study on The Construction of 3-Dimensional Edge Blend Surface Modeling (곡면 모델링에서 3차원 경계 곡면 블렌드 구성에 관한 연구)

  • 이창억
    • Journal of the Korean Professional Engineers Association
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    • v.27 no.3
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    • pp.121-131
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    • 1994
  • It is very difficult to partially describe the hull shape made up of 3-dimensional free form surface. With computerizing skill in ship design, the geometric modeling technique has been developed. In hull shape modeling, the blending technique has not yet been adapted to the hull shape surface has a variable curvature. By adapting the blend surface, small surface on drawing plane is to be softly blended with given hull surface and a projecting part. This study has adapted to the ship design one of the blending methods by which offsets data of the blend surface can be obtained by the input of blend radius on two base surfaces.

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Modeling of blend surfaces by Non Uniform B-spline surface patches (Non Uniform B-spline(NUB) 곡면에 의한 블랜드 곡면의 모델링)

  • Yoo, Woo-Sik;Jeong, Hoi-Min
    • Journal of Korean Institute of Industrial Engineers
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    • v.26 no.2
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    • pp.95-100
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    • 2000
  • Presented in this paper is a scheme for constructing ball rolling blends of a non-uniform B-spline surface(NUBS) patches. Ball rolling blending is a popular technique for blending between parametric surfaces. Along the "common edge" of a pair of "base surfaces" to be blended, a sequence of "ball positions" is sampled. The radius of the ball may vary along the line. At each sampling point, a ball center point and a pair of ball contact points are computed by applying a Jacobian inversion method. Using ball contact points, the constructing scheme of blend NUBS patches consists three steps; 1) determination of intermediate control vertices; 2) determination of boundary vectors; 3) determination of B-spline control vertices. The proposed blending scheme has been tested in a Omega CAM system and found to be working satisfactorily.

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High-quality Stitching Method of 3D Multiple Dental CT Images (3차원 다중 치과 CT 영상의 고화질 스티칭 기법)

  • Park, Seyoon;Park, Seongjin;Lee, Jeongjin;Shin, Juneseuk;Shin, Yeong-Gil
    • Journal of Korea Multimedia Society
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    • v.17 no.10
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    • pp.1205-1212
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    • 2014
  • In this paper, we propose a high-quality stitching method of 3D multiple dental CT images. First, a weighted function is generated using the difference of two distance functions that calculate a distance from the nearest edge of an overlapped region to each position. And a blending ratio propagation function for two gradient vectors is parameterized by the difference and magnitude of gradient vectors that is also applied by the weighted function. When the blending ratio is propagated, an improved region growing scheme is proposed to decide the next position and calculate the blending intensity. The proposed method produces a high-quality stitching image. Our method removes the seam artifact caused by the mean intensity difference between images and vignetting effect. And it removes double edges caused by local misalignment. Experimental results showed that the proposed method produced high-quality stitching images for ten patients. Our stitching method could be usefully applied into the stitching of 3D or 2D multiple images.

A study on the Image Mapping of the Exhibition Environment (전시환경의 영상 맵핑에 관한 연구)

  • Lee, Jae-Young;Kwon, Jun-Sik
    • Journal of Digital Contents Society
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    • v.19 no.7
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    • pp.1341-1348
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    • 2018
  • In this study, we propose a method for applying the image content to the exhibition space using projection mapping techniques. In a typical exhibition space, the artist exhibits works and displays them unilaterally and by using walls defined as screens. However, the new form of exhibition is not one-sided and changes in the way space is free from constraint. The purpose of the exhibition space is to use walls or various installations, which are elements of the exhibition space, as a key part of the exhibition rather than as a material for the spatial compartment. This type of display is a display element of space and you can enjoy the fun and excitement of the exhibition about the new environment. Various imaging techniques are required to construct an exhibition of images and spaces, among which edge blocking is not formed.

3D View Synthesis with Feature-Based Warping

  • Hu, Ningning;Zhao, Yao;Bai, Huihui
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.11 no.11
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    • pp.5506-5521
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    • 2017
  • Three-dimensional video (3DV), as the new generation of video format standard, can provide the viewers with a vivid screen sense and a realistic stereo impression. Meanwhile the view synthesis has become an important issue for 3DV application. Differently from the conventional methods based on depth, in this paper we propose a new view synthesis algorithm, which can employ the correlation among views and warp in the image domain only. There are mainly two contributions. One is the incorporation of sobel edge points into feature extraction and matching, which can obtain a better stable homography and then a visual comfortable synthesis view compared to SIFT points only. The other is a novel image blending method proposed to obtain a better synthesis image. Experimental results demonstrate that the proposed method can improve the synthesis quality both in subjectivity and objectivity.

An Extended Meshfree Method without the Blending Region (혼합영역이 없는 확장무요소법)

  • Zi, Goang-Seup;Rabczuk, Timon;Kim, Ji-Hwan
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • 2007.04a
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    • pp.507-512
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    • 2007
  • A new type of extended element-free Galerkin method (XFEM) is proposed on this paper. The blending region which was inevitable in the extended finite element method and the extended meshfree method is removed in this method. For this end, two different techniques are developed. The first one is the modification of the domain of influence so that the crack tip is always placed on the edge of a domain of influence. The second method is the use of the Lagrange multiplier. The crack is virtually extended beyond the actual crack tip. The virtual extension was forced close by the Lagrange multiplier. The first method can be applied to two dimensional problems only Lagrange multiplier method can be used in both two and three dimensions.

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Glocalization of e-Services (글로벌 e-서비스 기업의 현지 생존화 전략)

  • Min, Jae-H.
    • Korean Management Science Review
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    • v.28 no.3
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    • pp.125-141
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    • 2011
  • We have recently witnessed many of global companies did not successfully adapt themselves to local markets, and finally exited the markets experiencing failures. The purpose of this study is to suggest practical glocalization strategies for global e-service companies to run their respective businesses in local markets with success. Glocalization is a terminology blending globalization and localization, meaning that global companies adapt themselves to local cultures, environment, languages, laws and regulations so as to survive and prosper in those markets while maintaining high quality of standards and processes they originally have for global competitive edge. Examining success stories as well as failure ones of global e-service companies having entered Asian markets, we provide marketing mix strategy for successful glocalization, and suggest some guidelines for prospective e-service companies wishing to enter local markets with different cultures and languages to fit themselves to new environments.

Development of an Immersive VR Display System Supporting Continuous Arrangement of Multiple Screens (다중스크린의 연속적인 배치를 지원하는 몰입형 가상환경 디스플레이 시스템의 개발)

  • 남상훈;채영호;강재훈
    • Korean Journal of Computational Design and Engineering
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    • v.7 no.1
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    • pp.18-26
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    • 2002
  • The suggested modular projection system can have flexible arrangements of screens. Modular and continuous arrangements of the display system enable us to modify the screen configuration easily, so that the system can be used in various applications. The image of each screen is calculated automatically by using window projection and the tracked position of the viewer. This system also uses the off-axis stereoscopic projection for the seamless stereoscopic edge blending of multiple connections of screens. The system has been successfully tested for the general navigation model and the CAU driving simulator with motion platform.