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Stereoscopic VR 영상을 위한 개선된 Inpainting 기법
남다윤(Da-Yoon Nam),김해광(Haekwang kim),한종기(Jong-Ki Han) 한국방송·미디어공학회 2021 한국방송공학회 학술발표대회 논문집 Vol.2021 No.6
본 논문에서는 Stereoscopic VR 영상안의 Hole 을 제거하기 위한 효과적인 Inpainting 기술을 소개한다. 본 논문은 Mesh-based warping 과 Blending 기술을 적용하여 Hole 을 제거하는 새로운 Inpainting 알고리즘을 기술하였고, 성능 평가를 통해 제안 방법이 고품질의 Stereoscopic VR 영상을 생성시킬 수 있음을 확인하였다.
360 VR을 구성하는 영상들 간 밝기 차이를 이용한 seam finding 알고리즘
남다윤(Da-yoon Nam),한종기(Jong-Ki Han) 한국방송·미디어공학회 2018 방송공학회논문지 Vol.23 No.6
Seam finding algorithm is one of the most important techniques to construct the high quality 360 VR image. We found that some degradations, such as ghost effect, are generated when the conventional seam finding algorithms (for examples, Voronoi algorithm, Dynamic Programming algorithm, Graph Cut algorithm) are applied, because those make the inefficient masks which cross the body of main objects. In this paper, we proposed an advanced seam finding algorithm providing the efficient masks which go through background region, instead of the body of objects. Simulation results show that the proposed algorithm outperforms the conventional techniques in the viewpoint of the quality of the stitched image.
360 VR 기반 파노라마 영상 구성을 위한 칼라 및 밝기 보상 알고리즘
남다윤(Da-yoon Nam),한종기(Jong-Ki Han) 한국방송·미디어공학회 2019 방송공학회논문지 Vol.24 No.1
Techniques related to 360 VR service have been developed to improve the quality of the stitched image and video, where illumination compensation scheme is one of the important tools. Among the conventional illumination compensation algorithms, Gain-based compensation and Block Gain-based compensation algorithms have shown the outstanding performances in the process of making panorama picture. However, those are ineffective in the 360 VR service, because the disparity between illuminations of the multiple pictures in 360 VR is much more than that in making the panorama picture. In addition, the number of the pictures to be stitched in 360 VR system is more than that in the conventional panorama image system. Thus, we propose a preprocessing tool to enhance the illumination compensation algorithm so that the method reduces the degradation in the stitched picture of 360 VR systems. The proposed algorithm consists of ‘color compensation’ and ‘illumination compensation’. The simulation results show that the proposed technique improve the conventional techniques without additional complexity.