Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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Reduction of Discontinuity by Using Converging Pick-Up in Remapped Three-Dimensional Integral Imaging

집적영상에서 기본영상 재배열시 수렴광축을 이용한 불연속성 개선

  • Yu, Hyun-Woo (Department of Physics, Kangwon National University) ;
  • Seo, Kwang-Beom (Department of Physics, Kangwon National University) ;
  • Lee, Ho-Chul (Department of Physics, Kangwon National University) ;
  • Cha, Sungdo (Department of Physics, Kangwon National University) ;
  • Shin, Seung-Ho (Department of Physics, Kangwon National University)
  • 유현우 (강원대학교 물리학과, 레이저&비선형 광학 연구실) ;
  • 서광범 (강원대학교 물리학과, 레이저&비선형 광학 연구실) ;
  • 이호철 (강원대학교 물리학과, 레이저&비선형 광학 연구실) ;
  • 차성도 (강원대학교 물리학과, 레이저&비선형 광학 연구실) ;
  • 신승호 (강원대학교 물리학과, 레이저&비선형 광학 연구실)
  • Received : 2019.02.18
  • Accepted : 2019.04.29
  • Published : 2019.06.25
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Abstract

When elemental images are remapped to solve the depth conversion in integral imaging, the integrated image is inevitably accompanied by discontinuity. This paper analyzes the discontinuity factor caused by elemental-image remapping, to validate the reduction of the discontinuity through converging pick-up and reconstruction of the three-dimensional image in real and virtual modes simultaneously. The validity of the proposed method is quantitatively verified when compared with the conventional parallel pick-up.

집적영상에서 깊이역전 문제를 해결하기 위해 기본영상 재배열이 제안되었지만 시점영상이 연속적으로 재생되지 못하는 불연속성 문제를 포함하고 있다. 본 논문에서는 불연속성 요인을 분석하였다. 수렴광축으로 기본영상을 획득하고, 재배열한 후 실상 및 허상모드를 동시에 재생하는 불연속성 개선 방법을 제안하고, 평행광축을 이용하여 획득하고 실상모드로 재생하는 일반적인 방법과 비교하여 유효성을 정량적으로 검증하였다.

Keywords

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Fig. 1. Elemental image remapping for depth conversion.

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Fig. 2. Perspectives generated by remapping of elemental images.

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Fig. 3. Relations between the reconstruction mode and parallax according to the pick-up method.

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Fig. 4. Viewing angle of a single lens in a lens array with remapped elemental images.

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Fig. 5. Lateral quantization with respect to the depth distance.

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Fig. 6. Pick-up process with 5 × 5 camera array by using (a) converging and (b) parallel optical axes.

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Fig. 7. 5 × 5 elemental images obtained by using (a) converging and (b) parallel pick-up.

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Fig. 8. 50 × 50 remapped elemental images from (a) converging and (b) parallel pick-up.

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Fig. 9. Experimental setup.

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Fig. 10. Depth range extension with remapped elemental images of a converging optical axis.

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Fig. 11. Depth plane comparison by measuring quantization of a reconstructed image with (a) converging and (b) parallel optical axes.

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Fig. 12. Reconstructed images by integrating at five different perspectives with (a) converging and (b) parallel optical axes.

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