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| Presentation | 2021-10-22 14:25 Visually Fidelitous Dynamic-Range Compression from HDR Images -- Dependency of Individual on Perceived Time by Observing Images Reproduced with Global Tone Mapping Curves -- Yuichiro Orrita, Genta Higashi, Shoko Hira, Masayuki Kashima (Kagosima Univ.), Sakuichi Ohtsuka (International College of Technology, Kanazawa)  HIP2021-46 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Three different Global-tone-mapping (i.e., CD, SN, and DR) were employed for reproducing SDR images for subjective evaluation from HDR images taken in different time periods. Time conditions were four (i.e., early morning, morning, afternoon, late afternoon). Observers were required paired comparison based on subjective time periods when images were taken. Number of observers was twenty-four. Experimental results reveal that there are no observers who are able to evaluate time based on actual shooting time. In other words, they judge the time based on the difference in tone mapping curves (i.e., gradation). Further studies with cluster analysis suggest that (1) gradation-sensitive and insensitive groups are generally separated, but they are in spectrum, (2) there are differences in significant tone-mapping pairs by individual, (3) especially in early-morning and/or morning conditions, there exist two opposite-types of individuals who prefer high- or low- contrast, that is reflected the difference in daily visual life habits. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | HDR images / SDR images / tone curve / cluster analysis / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 121, no. 211, HIP2021-46, pp. 87-92, Oct. 2021. | |
| Paper # | HIP2021-46 | |
| Date of Issue | 2021-10-14 (HIP) | |
| ISSN | Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | HIP2021-46 |
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| Conference Information | |
| Committee | HIP |
| Conference Date | 2021-10-21 - 2021-10-22 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | HIP |
| Conference Code | 2021-10-HIP |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Visually Fidelitous Dynamic-Range Compression from HDR Images |
| Sub Title (in English) | Dependency of Individual on Perceived Time by Observing Images Reproduced with Global Tone Mapping Curves |
| Keyword(1) | HDR images |
| Keyword(2) | SDR images |
| Keyword(3) | tone curve |
| Keyword(4) | cluster analysis |
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| 1st Author's Name | Yuichiro Orrita |
| 1st Author's Affiliation | Kagoshima University (Kagosima Univ.) |
| 2nd Author's Name | Genta Higashi |
| 2nd Author's Affiliation | Kagoshima University (Kagosima Univ.) |
| 3rd Author's Name | Shoko Hira |
| 3rd Author's Affiliation | Kagoshima University (Kagosima Univ.) |
| 4th Author's Name | Masayuki Kashima |
| 4th Author's Affiliation | Kagoshima University (Kagosima Univ.) |
| 5th Author's Name | Sakuichi Ohtsuka |
| 5th Author's Affiliation | International College of Technology, Kanazawa (International College of Technology, Kanazawa) |
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| Speaker | Author-1 |
| Date Time | 2021-10-22 14:25:00 |
| Presentation Time | 25 minutes |
| Registration for | HIP |
| Paper # | HIP2021-46 |
| Volume (vol) | vol.121 |
| Number (no) | no.211 |
| Page | pp.87-92 |
| #Pages | 6 |
| Date of Issue | 2021-10-14 (HIP) |
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