Yuki Nagahama
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Yuki Nagahama has a total of 5 co-authors. Here are the top co-authors by number of shared publications:
Takashi Kakue
Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
2 shared publicationsTomoyoshi Ito
Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
2 shared publicationsTomoyoshi Shimobaba
Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
2 shared publicationsNobuyuki Masuda
Department of Applied Electronics, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan
1 shared publicationTetsuya Kawashima
Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
1 shared publication
Latest Publications
- 6 March 2017
- Published by Optica Publishing Group in Applied Optics
- Vol. 56 (13) , F61-F66
Speeding up image quality improvement in random phase-free holograms using ringing artifact characteristics
A holographic projector utilizes holography techniques. However, there are several barriers to realizing holographic projections. One is deterioration of hologram image quality caused by speckle noise and ringing artifacts. The combination of the random phase-free method and the Gerchberg–Saxton (GS) algorithm has improved the image quality of holograms. However, the GS algorithm requires significant computation time. We propose faster methods for image quality improvement of random phase-free holograms using the characteristics of ringing artifacts.
- 6 March 2017
- Published by Optica Publishing Group in Applied Optics
- Vol. 56 (13) , F61-F66
Speeding up image quality improvement in random phase-free holograms using ringing artifact characteristics
A holographic projector utilizes holography techniques. However, there are several barriers to realizing holographic projections. One is deterioration of hologram image quality caused by speckle noise and ringing artifacts. The combination of the random phase-free method and the Gerchberg–Saxton (GS) algorithm has improved the image quality of holograms. However, the GS algorithm requires significant computation time. We propose faster methods for image quality improvement of random phase-free holograms using the characteristics of ringing artifacts.
- 10 February 2016
- Published by Optica Publishing Group in Applied Optics
- Vol. 55 (5) , 1118-1123
Holographic multi-projection using the random phase-free method
We demonstrated holographic multi-projection using the random phase-free method and the iterative method. Holographic multi-projection is a method of projecting multiple different images focused on different screens at the same time. The random phase-free method succeeded in improving the image quality. By applying the iterative method to the random phase-free method, the image quality was improved further. The results of our numerical reconstruction and optical experiments confirm that the proposed method improves the image quality. The peak signal-to-noise ratios of the reconstructed images using the proposed method and the conventional method are 30.66 and 13.61 dB, respectively.
- 10 February 2016
- Published by Optica Publishing Group in Applied Optics
- Vol. 55 (5) , 1118-1123
Holographic multi-projection using the random phase-free method
We demonstrated holographic multi-projection using the random phase-free method and the iterative method. Holographic multi-projection is a method of projecting multiple different images focused on different screens at the same time. The random phase-free method succeeded in improving the image quality. By applying the iterative method to the random phase-free method, the image quality was improved further. The results of our numerical reconstruction and optical experiments confirm that the proposed method improves the image quality. The peak signal-to-noise ratios of the reconstructed images using the proposed method and the conventional method are 30.66 and 13.61 dB, respectively.