• Journal of Broadcast Engineering
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• v.25 no.5
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• pp.655-664
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• 2020

Free viewpoint image synthesis technology is one of the important technologies in the MPEG-I (Immersive) standard. RVS (Reference View Synthesizer) developed by MPEG-I and in use in MPEG group is a DIBR (Depth Information-Based Rendering) program that generates an image at a virtual (intermediate) viewpoint from multiple viewpoints' inputs. RVS uses the mesh surface method based on computer graphics, and outperforms the pixel-based ones by 2.5dB or more compared to the previous pixel method. Even though its OpenGL version provides 10 times speed up over the non OpenGL based one, it still shows a non-real-time processing speed, i.e., 0.75 fps on the two 2k resolution input images. In this paper, we analyze the internal of RVS implementation and modify its structure, achieving 34 times speed up, therefore, real-time performance (22-26 fps), through the 3 key improvements: 1) the reuse of OpenGL buffers and texture objects 2) the parallelization of file I/O and OpenGL execution 3) the parallelization of GPU shader program and buffer transfer.

• Proceedings of the Korea Information Processing Society Conference
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• 2020.05a
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• pp.600-603
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• 2020

360 영상은 시청자가 시야방향을 결정하는 3DoF(3 Degree of Freedom)를 지원한다. 본 연구에서는 다수의 360 영상에서 깊이 정보를 획득하고, 이를 DIBR (Depth -based Image Rendering) 기법을 사용하여 임의 시점 시청기능을 제공하는 6DoF(6 Degree of Freedom) 영상제작 기법을 제안한다. 이를 위하여 기존의 평면 다시점 영상기법을 확장하여 360 ERP 투영 영상으로부터 카메라의 파라미터 예측을 하는 방법과 깊이영상 추출 방법을 설계 및 구현하고 그 성능을 조사하였으며, OpenGL 그래픽스기반의 RVS(Reference View Synthesizer) 라이브러리를 사용하여 DIBR을 적용하였다.