| Paper Abstract and Keywords |
| Presentation |
2026-09-25 10:40
Speckle reduction method in hologram computation based on point cloud grouping and reuse of calculation result
Yota Iseki, Hiroto Nishimura, Kotomi Nakanishi (Tokushima Univ.), Ying-Pin Tsai (NCUE), Munekazu Date (Tokushima Bunri Univ.), Boaz Jessie Jackin (Kochi Univ.), Kenji Yamamoto (Tokushima Univ.) |
| Abstract |
(in Japanese) |
(See Japanese page) |
| (in English) |
Speckle noise is important issue and can be reduced by quick update and the time-averaging function of the human eyes in computer-generated holography (CGH), but generating numerous holograms requires significant computation. We propose two low-computational-cost speckle reduction methods that preserve the total number of object points. Both approaches divide the point cloud into some groups and reuse precomputed results across multiple frames. The first method cyclically updates only a subset of groups, while the second rapidly synthesizes complex amplitude distributions using a Hadamard matrix. Numerical simulations demonstrate that both proposed methods reduce the computational burden compared to conventional quick update while achieving effective speckle reduction. |
| Keyword |
(in Japanese) |
(See Japanese page) |
| (in English) |
holography / temporal averagin / speckle reduction / Hadamard matrix / / / / |
| Reference Info. |
ITE Tech. Rep., vol. 50, no. 27, 3DMT2026-57, pp. 53-56, Sept. 2026. |
| Paper # |
3DMT2026-57 |
| Date of Issue |
2026-09-17 (3DMT) |
| ISSN |
Online edition: ISSN 2424-1970 |
| Download PDF |
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| Conference Information |
| Committee |
3DMT |
| Conference Date |
2026-09-24 - 2026-09-25 |
| Place (in Japanese) |
(See Japanese page) |
| Place (in English) |
Nagasaki University |
| Topics (in Japanese) |
(See Japanese page) |
| Topics (in English) |
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| Paper Information |
| Registration To |
3DMT |
| Conference Code |
2026-09-3DMT |
| Language |
Japanese |
| Title (in Japanese) |
(See Japanese page) |
| Sub Title (in Japanese) |
(See Japanese page) |
| Title (in English) |
Speckle reduction method in hologram computation based on point cloud grouping and reuse of calculation result |
| Sub Title (in English) |
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| Keyword(1) |
holography |
| Keyword(2) |
temporal averagin |
| Keyword(3) |
speckle reduction |
| Keyword(4) |
Hadamard matrix |
| Keyword(5) |
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| Keyword(6) |
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| Keyword(7) |
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| 1st Author's Name |
Yota Iseki |
| 1st Author's Affiliation |
Tokushima University (Tokushima Univ.) |
| 2nd Author's Name |
Hiroto Nishimura |
| 2nd Author's Affiliation |
Tokushima University (Tokushima Univ.) |
| 3rd Author's Name |
Kotomi Nakanishi |
| 3rd Author's Affiliation |
Tokushima University (Tokushima Univ.) |
| 4th Author's Name |
Ying-Pin Tsai |
| 4th Author's Affiliation |
National Changhua University of Education (NCUE) |
| 5th Author's Name |
Munekazu Date |
| 5th Author's Affiliation |
Tokushima Bunri University (Tokushima Bunri Univ.) |
| 6th Author's Name |
Boaz Jessie Jackin |
| 6th Author's Affiliation |
Kochi University (Kochi Univ.) |
| 7th Author's Name |
Kenji Yamamoto |
| 7th Author's Affiliation |
Tokushima University (Tokushima Univ.) |
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| Speaker |
Author-1 |
| Date Time |
2026-09-25 10:40:00 |
| Presentation Time |
20 minutes |
| Registration for |
3DMT |
| Paper # |
3DMT2026-57 |
| Volume (vol) |
vol.50 |
| Number (no) |
no.27 |
| Page |
pp.53-56 |
| #Pages |
4 |
| Date of Issue |
2026-09-17 (3DMT) |