journal article·2025-08-28Open access

Deep Learning-Based Optimization of Central Angle and Viewpoint Configuration for 360-Degree Holographic Content

Hakdong Kim, Yurim Lee, MinSung Yoon, Cheongwon Kim

Applied Sciences· Volume 15· Issue 17

Abstract

We present a deep learning-based approach to optimize the central angle between adjacent camera viewpoints for the efficient generation of natural 360-degree holographic 3D content. High-quality 360-degree digital holograms require the acquisition of densely sampled RGB–depth map pairs, a process that traditionally requires significant computational costs. Our method introduces a novel pipeline that systematically evaluates the impact of varying central angles—defined as the angular separation between equidistant viewpoints in an object-centered coordinate system—on both depth map estimation and holographic 3D image reconstruction. By systematically applying this pipeline, we determine the optimal central angle that achieves an effective balance between image quality and computational efficiency. Experimental investigations demonstrate that our approach significantly reduces computational demands while maintaining superior fidelity of the reconstructed 3D holographic images. The relationship between central angle selection and the resulting quality of 360-degree digital holographic 3D content is thoroughly analyzed, providing practical guidelines for the creation of immersive holographic video experiences. This work establishes a quantitative standard for the geometric configuration of viewpoint sampling in object-centered environments and advances the practical realization of real-time, high-quality holographic 3D content.
Source: crossref · Quality: baseline

Research context

OpenAlex topics: Advanced Optical Imaging Technologies · Optical Systems and Laser Technology · Augmented Reality Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Digital Contents, Sejong University, Seoul 05006, Republic of Korea

Department of Software, Sejong University, Seoul 05006, Republic of Korea

Hyper-Reality Metaverse Research Laboratory, Electronics and Telecommunications Research Institute, Daejeon 34129, Republic of Korea

R&D Center, Heerae Corporation, Seoul 04790, Republic of Korea

Funding

National Research Foundation of Korea (NRF) · Korea government (MSIT)

References (33)

Show source-provided references
1. Towards real-time photorealistic 3D holography with deep neural networks10.1038/s41586-020-03152-0 ↗
2. A metaverse: Taxonomy, components, applications, and open challenges10.1109/ACCESS.2021.3140175 ↗
3. Mozumder, M., Theodore, A., Athar, A., and Kim, H. (2023, January 19–22). The metaverse applications for the finance industry, its challenges, and an approach for the metaverse finance industry. Proceedings of the 2023 25th International Conference on Advanced Communication Technology (ICACT), Pyeongchang, Republic of Korea.
4. Hybrid Approach of Holography and Augmented-Reality Reconstruction Optimizations for Hyper-Reality Metaverse Video Applications10.1109/TBC.2023.3308328 ↗
5. Tomographic measurement of dielectric tensors at optical frequency10.1038/s41563-022-01202-8 ↗
6. Kim, H., Jun, T., Lee, H., Chae, B.G., Yoon, M., and Kim, C. (2024). Deep-learning based 3D birefringence image generation using 2D multi-view holographic images. Sci. Rep., 14.10.1038/s41598-024-60023-8 ↗
7. Holography and its applications for industry 4.0: An overview10.1016/j.iotcps.2022.05.004 ↗
8. Real-time realistic computer-generated hologram with accurate depth precision and a large depth range10.1364/OE.474644 ↗
9. Depth map prediction from a single image using a multi-scale deep network
10. Li, B., Shen, C., Dai, Y., Van Den Hengel, A., and He, M. (2015, January 7–12). Depth and surface normal estimation from monocular images using regression on deep features and hierarchical CRFs. Proceedings of the IEEE Conference on Computer Vision and Pattern Recognition, Boston, MA, USA.
11. Learning depth from single monocular images using deep convolutional neural fields10.1109/TPAMI.2015.2505283 ↗
12. Wang, P., Shen, X., Lin, Z., Cohen, S., Price, B., and Yuille, A. (2015, January 7–12). Towards unified depth and semantic prediction from a single image. Proceedings of the IEEE Conference on Computer Vision and Pattern Recognition, Boston, MA, USA.
13. Lore, K., Reddy, K., Giering, M., and Bernal, E. (2018, January 18–22). Generative adversarial networks for depth map estimation from RGB video. Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition Workshops, Salt Lake City, UT, USA.10.1109/CVPRW.2018.00163 ↗
14. Aleotti, F., Tosi, F., Poggi, M., and Mattoccia, S. (2018, January 8–14). Generative adversarial networks for unsupervised monocular depth prediction. Proceedings of the European Conference on Computer Vision (ECCV) Workshops, Munich, Germany.10.1007/978-3-030-11009-3_20 ↗
15. Ronneberger, O., Fischer, P., and Brox, T. (2015, January 5–9). U-net: Convolutional networks for biomedical image segmentation. Proceedings of the International Conference on Medical Image Computing and Computer-Assisted Intervention, Munich, Germany.10.1007/978-3-319-24574-4_28 ↗
16. Alhashim, I., and Wonka, P. (2018). High quality monocular depth estimation via transfer learning. arXiv.
17. Zhou, T., Brown, M., Snavely, N., and Lowe, D. (2017, January 21–26). Unsupervised learning of depth and ego-motion from video. Proceedings of the IEEE Conference on Computer Vision and Pattern Recognition, Honolulu, HI, USA.10.1109/CVPR.2017.700 ↗
18. Yang, Z., Wang, P., Xu, W., Zhao, L., and Nevatia, R. (2017). Unsupervised learning of geometry with edge-aware depth-normal consistency. arXiv.10.1609/aaai.v32i1.12257 ↗
19. Alagoz, B. (2008). Obtaining depth maps from color images by region based stereo matching algorithms. arXiv.
20. Joung, S., Kim, S., Ham, B., and Sohn, K. (2017, January 17–20). Unsupervised stereo matching using correspondence consistency. Proceedings of the 2017 IEEE International Conference on Image Processing (ICIP), Beijing, China.10.1109/ICIP.2017.8296736 ↗
21. Garg, R., Bg, V., Carneiro, G., and Reid, I. (2016, January 11–14). Unsupervised CNN for single view depth estimation: Geometry to the rescue. Proceedings of the European Conference on Computer Vision–ECCV 2016, Amsterdam, The Netherlands.10.1007/978-3-319-46484-8_45 ↗
22. Luo, Y., Ren, J., Lin, M., Pang, J., Sun, W., Li, H., and Lin, L. (2018, January 18–23). Single view stereo matching. Proceedings of the IEEE Conference on Computer Vision and Pattern Recognition, Salt Lake City, UT, USA.10.1109/CVPR.2018.00024 ↗
23. Wu, Z., Wu, X., Zhang, X., Wang, S., and Ju, L. (November, January 27). Spatial correspondence with generative adversarial network: Learning depth from monocular videos. Proceedings of the IEEE/CVF International Conference on Computer Vision, Seoul, Republic of Korea.
24. Shekhar, S., and Xiong, H. (2007). Encyclopedia of GIS, Springer Science & Business Media.10.1007/978-0-387-35973-1 ↗
25. Pei, Z., Wen, D., Zhang, Y., Ma, M., Guo, M., Zhang, X., and Yang, Y. (2020). MDEAN: Multi-view disparity estimation with an asymmetric network. Electronics, 9.10.3390/electronics9060924 ↗
26. Zioulis, N., Karakottas, A., Zarpalas, D., Alvarez, F., and Daras, P. (2019, January 16–19). Spherical view synthesis for self-supervised 360 depth estimation. Proceedings of the 2019 International Conference on 3D Vision (3DV), Quebec City, QC, Canada.10.1109/3DV.2019.00081 ↗
27. Foreground-aware dense depth estimation for 360 images10.24132/JWSCG.2020.28.10 ↗
28. (2025, July 11). Autodesk Maya. Available online: https://www.autodesk.com/products/maya/overview.
29. Nair, V., and Hinton, G.E. (2010, January 21–24). Rectified linear units improve restricted boltzmann machines. Proceedings of the 27th International Conference on Machine Learning (ICML-10), Haifa, Israel.
30. Image quality assessment: From error visibility to structural similarity10.1109/TIP.2003.819861 ↗
31. Hore, A., and Ziou, D. (2010, January 23–26). Image quality metrics: PSNR vs. SSIM. Proceedings of the 2010 20th International Conference on Pattern Recognition, Istanbul, Turkey.10.1109/ICPR.2010.579 ↗
32. DeepCGH: 3D computer-generated holography using deep learning10.1364/OE.399624 ↗
33. Sampled Fourier transform hologram generated by computer10.1364/AO.9.000639 ↗