• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2004년도 Asia Display / IMID 04
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• pp.259-262
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• 2004

We propose novel schemes to enhance the expressible depth range of integral imaging. The implemented system that adopts the mirror barrier array has the compact thickness that is suitable for the practical use. With this system, the expressible depth range of the integral imaging is increased to over 120mm. The system that eliminates the mechanical motion also had been implemented. Experimental results are presented and the way to resolve the problem of occlusion is also discussed.

• Journal of the Optical Society of Korea
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• 제14권2호
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• pp.121-126
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• 2010

We analyze image visibility of a projection-type integral imaging system without diffuser, in terms of the fill factor, which is determined by the relationship between the exit pupil of the projection system and the size and the focal length of the elemental lens. High fill factor is a requirement for good visibility. Moreover, for psychological reasons, for the same fill factor, better visibility is accomplished using a relatively small elemental lens. In this paper, we study image visibility through basic experiments and results.

• 한국광학회지
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• 제16권3호
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• pp.225-234
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• 2005

3차원 영상 재생을 위한 집적결상법에서 픽업시 기본영상의 크기는 기본렌즈 크기, 기본렌즈와 기본영상 사이의 간격 등 몇 가지 변수들과 일정한 관계를 갖는다. 이 기하학적 관계들을 분석하고, 기본영상의 크기 및 거리가 픽업시와 다른 경우 기본영상의 배열이나 개별적인 크기 변환에 의해 재생되는 3차원영상의 특성변화를 이론적으로 분석하고 실험을 통해 확인하였다.

• 한국통신학회논문지
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• 제33권12C호
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• pp.1068-1074
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• 2008

본 논문에서는 컴퓨터적으로 생성하는 집적영상 시스템에서 룩업테이블(Look-up Table)을 사용해서 요소영상 배열을 효과적으로 생성하는 알고리즘을 제안한다. 이 알고리즘은 물체의 점이 픽업 면에 투영되는 위치를 찾기 위해서 x와 y의 투영 점에 대해서 서로 독립적인 룩업테이블을 작성하고 이를 사용해서 요소영상 배열을 생성하는 계산 속도를 개선하였다. 제안된 알고리즘과 기존 알고리즘들의 계산 시간을 실험을 통해서 비교한 결과 제안 된 알고리즘이 더 효율적임을 증명하였다.

• Journal of information and communication convergence engineering
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• 제14권1호
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• pp.57-63
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• 2016

In generally, the resolution of reconstructed three-dimensional images can be seriously degraded by undesired occlusions in the integral imaging system, because the undesired information of the occlusion overlap the three-dimensional images to be reconstructed. To solve the problem of the undesired occlusion, we present an exemplar-based image restoration method in integral imaging system. In the proposed method, a minimum spanning tree-based stereo matching method is used to remove the region of undesired occlusions in each elemental image. After that, the removed occlusion region of each elemental images are re-established by using the exemplar-based image restoration method. For further improve the performance of the image restoration, the structure tensor is used to solve the filling error cause by discontinuous structures. Finally, the resolution enhanced three-dimensional images are reconstructed by using the restored elemental images. The preliminary experiments are presented to demonstrate the feasibility of the proposed method.

• Journal of the Optical Society of Korea
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• 제19권3호
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• pp.248-254
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• 2015

In this paper we propose an improved version of the computational integral imaging reconstruction (CIIR) for visualizing a partially occluded object by utilizing an image inpainting technique. In the proposed method the elemental images for a partially occluded three-dimensional (3D) object are recorded through the integral imaging pickup process. Next, the depth of occlusion within the elemental images is estimated using two different CIIR methods, and the weight mask pattern for occlusion is generated. After that, we apply our image inpainting technique to the recorded elemental images to fill in the occluding area with reliable data, using information from neighboring pixels. Finally, the inpainted elemental images for the occluded region are reconstructed using the CIIR process. To verify the validity of the proposed system, we carry out preliminary experiments in which faces are the objects. The experimental results reveal that the proposed system can dramatically improve the quality of a reconstructed CIIR image.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.I
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• pp.41-45
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• 2005

A new algorithm of the image mapping which is a technique of the elemental image generation is proposed. The proposed method is based on the characteristics of the lens array such as the number, the size and the focal length of the elemental lens. The 3D image generated by 3D graphic API such as OpenGL can be directly adopted without the complex adaptation. Since the image mapping using the proposed method can enhance the speed of the elemental image generation, the computer- generated integral imaging system can be applied to virtual reality system.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2008년도 International Meeting on Information Display
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• pp.1135-1137
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• 2008

In this paper, it is proposed that the integral imaging technique is applied to reconstruct 3D (three dimensional) objects with enhanced depth of field, computationally and optically. Lens array using birefringence material is adopted to obtain the reconstruction. The elemental images sets are picked up through common micro lens array and utilized to present 3D reconstruction images using adopted lens array.

• Journal of the Optical Society of Korea
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• 제8권2호
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• pp.65-71
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• 2004

In this paper, we analyze the limitation on the expressible depth range that is one major problem of integral imaging. We provide the explanation that exactly predicts the experimental results and the way to evaluate the expressible depth range numerically. We also give the design method for the multi-central depth plane integral imaging system. Finally, we will show the experimental results for verification.

• 한국통신학회논문지
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• 제33권11C호
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• pp.898-904
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• 2008

본 논문에서는 컴퓨터적으로 생성하는 집적영상 시스템에서 요소영상 배열을 생성하기 위한 새로운 fast 알고리즘을 제안한다. 이 알고리즘은 깊이 정보를 사용해서 요소영상 배열을 생성하며, 경계 영역 개념을 도입하여 경계영역 내에 있는 복셀에 대해서만 연산을 수행하여 알고리즘의 계산 속도를 개선하였다. 제안된 알고리즘과 기존 알고리즘의 계산 시간을 이론적 및 실험적으로 비교한 결과 제안된 알고리즘이 더 효율적임을 증명하였다.