• 제목/요약/키워드: Elemental images

검색결과 138건 처리시간 0.022초

Computational Integral Imaging Reconstruction of a Partially Occluded Three-Dimensional Object Using an Image Inpainting Technique

  • Lee, Byung-Gook;Ko, Bumseok;Lee, Sukho;Shin, Donghak
    • 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.

수평시차 기반의 변형된 집적영상 기법의 광학적 구현 (Optical implementation of modified integral imaging method based on horizontal parallax)

  • 신동학;권영만;김은수
    • 한국정보통신학회논문지
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    • 제10권4호
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    • pp.712-717
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    • 2006
  • 본 논문에서는 기존의 집적영상에서 요소 영상을 변형하여 수평시차만을 갖는 새로운 집적영상 기법을 제시하고 광학적으로 구현하였다. 즉, 기존 방식으로 픽업된 2차원 요소 영상에서 한 열의 수평 요소 영상을 수직방향으로 확대하여 전체 요소 영상을 얻고 이를 통해 3차원 입체 영상을 재현하게 된다. 제시하는 수평시차 기반의 집적영상 기법은 수직시차가 제거되어 전송을 위한 요소 영상의 정보량을 크게 줄일 수 있다. 제시된 방식의 유용성을 보이기 위하여 광학적 구현 실험을 수행하고 그 결과를 제시하였다.

Free-view Pixels of Elemental Image Rearrangement Technique (FPERT)

  • Lee, Jaehoon;Cho, Myungjin;Inoue, Kotaro;Tashiro, Masaharu;Lee, Min-Chul
    • Journal of information and communication convergence engineering
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    • 제17권1호
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    • pp.60-66
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    • 2019
  • In this paper, we propose a new free-view three-dimensional (3D) computational reconstruction of integral imaging to improve the visual quality of reconstructed 3D images when low-resolution elemental images are used. In a conventional free-view reconstruction, the visual quality of the reconstructed 3D images is insufficient to provide 3D information to applications because of the shift and sum process. In addition, its processing speed is slow. To solve these problems, our proposed method uses a pixel rearrangement technique (PERT) with locally selective elemental images. In general, PERT can reconstruct 3D images with a high visual quality at a fast processing speed. However, PERT cannot provide a free-view reconstruction. Therefore, using our proposed method, free-view reconstructed 3D images with high visual qualities can be generated when low-resolution elemental images are used. To show the feasibility of our proposed method, we applied it to optical experiments.

Parallel Processing for Integral Imaging Pickup Using Multiple Threads

  • Jang, Young-Hee;Park, Chan;Park, Jae-Hyeung;Kim, Nam;Yoo, Kwan-Hee
    • International Journal of Contents
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    • 제5권4호
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    • pp.30-34
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    • 2009
  • Many studies have been done on the integral imaging pickup whose objective is to get efficiently elemental images from a lens array with respect to three-dimensional (3D) objects. In the integral imaging pickup process, it is necessary to render an elemental image from each elemental lens in a lens array for 3D objects, and then to combine them into one total image. The multiple viewpoint rendering (MVR) is one of various methods for integral imaging pickup. This method, however, has the computing and rendering time problem for obtaining element images from a lot of elemental lens. In order to solve the problems, in this paper, we propose a parallel MVR (PMVR) method to generate elemental images in a parallel through distribution of elemental lenses into multiple threads simultaneously. As a result, the computation time of integral imaging using PMVR is reduced significantly rather than a sequential approach and then we showed that the PMVR is very useful.

3D Visualization Technique for Occluded Objects in Integral Imaging Using Modified Smart Pixel Mapping

  • Lee, Min-Chul;Han, Jaeseung;Cho, Myungjin
    • Journal of information and communication convergence engineering
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    • 제15권4호
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    • pp.256-261
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    • 2017
  • In this paper, we propose a modified smart pixel mapping (SPM) to visualize occluded three-dimensional (3D) objects in real image fields. In integral imaging, orthoscopic real 3D images cannot be displayed because of lenslets and the converging light field from elemental images. Thus, pseudoscopic-to-orthoscopic conversion which rotates each elemental image by 180 degree, has been proposed so that the orthoscopic virtual 3D image can be displayed. However, the orthoscopic real 3D image cannot be displayed. Hence, a conventional SPM that recaptures elemental images for the orthoscopic real 3D image using virtual pinhole array has been reported. However, it has a critical limitation in that the number of pixels for each elemental image is equal to the number of elemental images. Therefore, in this paper, we propose a modified SPM that can solve this critical limitation in a conventional SPM and can also visualize the occluded objects efficiently.

핀홀 모델 기반의 1차원 집적 영상 기법의 광학적 구현 (Optical implementation of unidirectional integral imaging based on pinhole model)

  • 신동학;김남우;이준재
    • 한국정보통신학회논문지
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    • 제11권2호
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    • pp.337-343
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    • 2007
  • 집적 영상 기술에서 재생되는 3차원 영상은 요소 영상의 해상도에 비례하기 때문에 고해상도의 3차원 영상을 얻기 위해서 요소 영상의 정보량이 급격히 증가하는 문제가 있다. 본 논문에서는 이 문제점을 해결하기 위해서 핀홀 모델 기반의 새로운 1차원 집적 영상 기법을 제안한다. 제안하는 기법에서 새로운 형태의 1차원 요소 영상을 제공하며, 이 요소 영상은 기존의 2차원 요소 영상에서 핀홀 모델을 적용하여 각각의 요소 영상에 대해서 수평 픽셀 라인을 선택하고 확대하여 만들고 지며, 이를 3차원 영상의 재생에 사용하였다. 제안하는 기법은 수직시차를 제거함으로써 요소영상의 정보량을 상당히 감소시킬 수 있다. 제안하는 방법 유용함을 보이기 위해서 광학적 실험을 수행하고, 그 결과를 보고한다.

Position Detection of a Scattering 3D Object by Use of the Axially Distributed Image Sensing Technique

  • Cho, Myungjin;Shin, Donghak;Lee, Joon-Jae
    • Journal of the Optical Society of Korea
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    • 제18권4호
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    • pp.414-418
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    • 2014
  • In this paper, we present a method to detect the position of a 3D object in scattering media by using the axially distributed sensing (ADS) method. Due to the scattering noise of the elemental images recorded by the ADS method, we apply a statistical image processing algorithm where the scattering elemental images are converted into scatter-reduced ones. With the scatter-reduced elemental images, we reconstruct the 3D images using the digital reconstruction algorithm based on ray back-projection. The reconstructed images are used for the position detection of a 3D object in the scattering medium. We perform the preliminary experiments and present experimental results.

렌즈분할 기반의 시간다중화 3D 집적영상 디스플레이를 위한 컴퓨터적인 요소영상 생성방법 (Computational generation method of elemental images for time-multiplexed 3D integral imaging display based on lens division)

  • 오용석;신동학;정신일
    • 한국정보통신학회논문지
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    • 제18권10호
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    • pp.2571-2578
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    • 2014
  • 본 논문에서는 렌즈분할 기반의 시간다중화 3D 집적영상 디스플레이를 위한 컴퓨터적인 요소영상 생성 방법을 제안한다. 제안하는 방법에 대하여 3차원 물체와 요소영상 사이의 기하광학적인 결상관계를 해석하고, 이 결상관계를 통하여 시간다중화 방식의 요소영상들을 생성한다. 요소영상 생성할 때, 제안하는 방법에서는 픽업되는 물체점의 위치가 기존 방식의 위치보다 절반의 분할렌즈 크기만큼 이동된다. 제안한 방법에 대한 기초적인 실험을 수행하고 그 결과를 보고한다.

Resolution Enhanced Computational Integral Imaging Reconstruction by Using Boundary Folding Mirrors

  • Piao, Yongri;Xing, Luyan;Zhang, Miao;Lee, Min-Chul
    • Journal of the Optical Society of Korea
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    • 제20권3호
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    • pp.363-367
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    • 2016
  • In this paper, we present a resolution-enhanced computational integral imaging reconstruction method by using boundary folding mirrors. In the proposed method, to improve the resolution of the computationally reconstructed 3D images, the direct and reflected light information of the 3D objects through a lenslet array with boundary folding mirrors is recorded as a combined elemental image array. Then, the ray tracing method is employed to synthesize the regular elemental image array by using a combined elemental image array. From the experimental results, we can verify that the proposed method can improve the visual quality of the computationally reconstructed 3D images.

3차원 영상 재생을 위한 집적결상법에서 기본영상 재조합을 통한 재생영상의 깊이 변환 (Depth-Conversion in Integral Imaging Three-Dimensional Display by Means of Elemental Image Recombination)

  • 서장일;신승호
    • 한국광학회지
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    • 제18권1호
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    • pp.24-30
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    • 2007
  • 3차원 영상 재생을 위한 집적결상법에서 기본영상의 재조합을 통한 재생영상의 깊이변환에 관하여 연구하였다. 렌즈 배열 또는 카메라 배열 등을 통하여 획득된 영상 배열을 적절한 조건 하에서 재조합하여 재생함으로써 재생영상의 깊이에 대해 도치(pseudoscopic) 영상 또는 정치(orthoscopic) 영상, 허상, 실상 뿐만 아니라 임의의 깊이로의 왜곡 없는 변환이 가능하다. 본 논문에서는 각 변환에 대한 재조합 조건을 이론적으로 유도하고 실험을 통하여 확인하였다.