| Paper Abstract and Keywords |
| Presentation |
2026-03-13 15:20
[Invited Talk]
Printable Moderate-Dynamic-Range (MDR) Image Generation Employing High-Dynamic-Range (HDR) Image Capture Technology Aligned with Human Circadian Behavior
Sakuichi Ohtsuka, Michihiro Hayashi (ICT), Shoko Hira (Kagoshima Univ.), Saki Iwaida (Kagoshima Tenmonkan Medical College) |
| Abstract |
(in Japanese) |
(See Japanese page) |
| (in English) |
The relationship between vision and circadian rhythms has been extensively studied, but processing of visible light has been thought to begin in the visual cortex, with the “retina being a simple passive sensor.” In contrast, our hypothesis posits that “the retina is a sophisticated active sensor,” where the SCN (suprachiasmatic nucleus) actively controls the day-night gradation processing occurring within the retina as a first step. To test this hypothesis, it is necessary to reproduce the output image of the first stage (NVP) through image processing. Therefore, we try to extend the hypothesis from daylight vision to twilight vision. The core of the verification procedure is to focus on the observation of printed images during the daytime. Because it is a “reflected image,” it suggests that in twilight scenes observed in “surface color mode” during the day, the “emitting light source” can be perceived naturally. It was demonstrated that images with a highly compressed contrast ratio of approximately 30:1 retain significantly higher naturalness than conventional SDR printed images. |
| Keyword |
(in Japanese) |
(See Japanese page) |
| (in English) |
High-Dynamic-Range (HDR) / Normalized Visual Percept (NVP) / twilight vision / circadian rhythm / / / / |
| Reference Info. |
ITE Tech. Rep., vol. 50, no. 10, IDY2026-32, pp. 29-35, March 2026. |
| Paper # |
IDY2026-32 |
| Date of Issue |
2026-03-06 (IDY) |
| ISSN |
Online edition: ISSN 2424-1970 |
| Download PDF |
|
| Conference Information |
| Committee |
IDY SID-JC |
| Conference Date |
2026-03-13 - 2026-03-13 |
| Place (in Japanese) |
(See Japanese page) |
| Place (in English) |
online |
| Topics (in Japanese) |
(See Japanese page) |
| Topics (in English) |
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| Paper Information |
| Registration To |
IDY |
| Conference Code |
2026-03-IDY-JC |
| Language |
Japanese |
| Title (in Japanese) |
(See Japanese page) |
| Sub Title (in Japanese) |
(See Japanese page) |
| Title (in English) |
Printable Moderate-Dynamic-Range (MDR) Image Generation Employing High-Dynamic-Range (HDR) Image Capture Technology Aligned with Human Circadian Behavior |
| Sub Title (in English) |
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| Keyword(1) |
High-Dynamic-Range (HDR) |
| Keyword(2) |
Normalized Visual Percept (NVP) |
| Keyword(3) |
twilight vision |
| Keyword(4) |
circadian rhythm |
| Keyword(5) |
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| 1st Author's Name |
Sakuichi Ohtsuka |
| 1st Author's Affiliation |
International College of Technology, Kanazawa (ICT) |
| 2nd Author's Name |
Michihiro Hayashi |
| 2nd Author's Affiliation |
International College of Technology, Kanazawa (ICT) |
| 3rd Author's Name |
Shoko Hira |
| 3rd Author's Affiliation |
Kagoshima University (Kagoshima Univ.) |
| 4th Author's Name |
Saki Iwaida |
| 4th Author's Affiliation |
Kagoshima Tenmonkan Medical College (Kagoshima Tenmonkan Medical College) |
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| Speaker |
Author-1 |
| Date Time |
2026-03-13 15:20:00 |
| Presentation Time |
20 minutes |
| Registration for |
IDY |
| Paper # |
IDY2026-32 |
| Volume (vol) |
vol.50 |
| Number (no) |
no.10 |
| Page |
pp.29-35 |
| #Pages |
7 |
| Date of Issue |
2026-03-06 (IDY) |