| Paper Abstract and Keywords |
| Presentation |
2026-06-05 10:40
A Proposal of Tone Mapping Method Based on the Fast Local Laplacian Filter and Brightness, Contrast, and Saturation Adjustments Seiichi Kojima, Noriaki Suetake (Yamaguchi Univ.) SIS2026-10 |
| Abstract |
(in Japanese) |
(See Japanese page) |
| (in English) |
A high-dynamic-range (HDR) image accommodates a wide range of brightness information of a scene.
An HDR image cannot be directly displayed on standard monitors whose dynamic range is lower than that of the HDR image.
To display an HDR image on low-dynamic-range (LDR)-output devices, the dynamic range adjustment processing called tone mapping is necessary.
In this report, we propose a new fast local Laplacian filter (FLLF)-based tone mapping method for obtaining the image with high visibility in detail and suppressed the loss of details.
FLLF is a fast approximation method of local Laplacian filter (LLF), which is an edge-preserving image processing method using Laplacian pyramid.
The proposed method applies the dynamic range compression using FLLF to the luminance of the input HDR image.
After that, in the proposed method, brightness adjustment for the whole image, gamma transformation, brightness adjustment for the very bright region, dynamic range compression using FLLF, global contrast adjustment, and local contrast enhancement are performed sequentially to obtain the output luminance image.
Then, the target saturation is calculated by generating the color-version of the intermediate output image of the above processing and amplifying the saturation of the generated color image.
Finally, the output color image is generated using the equi-hue plane in the RGB color space.
Through experiments, the effectiveness of the proposed method is verified. |
| Keyword |
(in Japanese) |
(See Japanese page) |
| (in English) |
HDR Image Processing / Tone Mapping / Local Laplacian Filter / Equi-hue Plane / / / / |
| Reference Info. |
IEICE Tech. Rep., vol. 126, no. 54, SIS2026-10, pp. 46-51, June 2026. |
| Paper # |
SIS2026-10 |
| Date of Issue |
2026-05-28 (SIS) |
| 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 |
SIS2026-10 |
| Conference Information |
| Committee |
SIS |
| Conference Date |
2026-06-04 - 2026-06-05 |
| Place (in Japanese) |
(See Japanese page) |
| Place (in English) |
Iwaki Business Innovation Center |
| Topics (in Japanese) |
(See Japanese page) |
| Topics (in English) |
Intelligent Multimedia Systems, Applied Embedded Systems, Three-Dimensional Image Technology (3DIT), etc. |
| Paper Information |
| Registration To |
SIS |
| Conference Code |
2026-06-SIS |
| Language |
Japanese |
| Title (in Japanese) |
(See Japanese page) |
| Sub Title (in Japanese) |
(See Japanese page) |
| Title (in English) |
A Proposal of Tone Mapping Method Based on the Fast Local Laplacian Filter and Brightness, Contrast, and Saturation Adjustments |
| Sub Title (in English) |
|
| Keyword(1) |
HDR Image Processing |
| Keyword(2) |
Tone Mapping |
| Keyword(3) |
Local Laplacian Filter |
| Keyword(4) |
Equi-hue Plane |
| Keyword(5) |
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| Keyword(6) |
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| Keyword(7) |
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| Keyword(8) |
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| 1st Author's Name |
Seiichi Kojima |
| 1st Author's Affiliation |
Yamaguchi University (Yamaguchi Univ.) |
| 2nd Author's Name |
Noriaki Suetake |
| 2nd Author's Affiliation |
Yamaguchi University (Yamaguchi Univ.) |
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| Speaker |
Author-1 |
| Date Time |
2026-06-05 10:40:00 |
| Presentation Time |
20 minutes |
| Registration for |
SIS |
| Paper # |
SIS2026-10 |
| Volume (vol) |
vol.126 |
| Number (no) |
no.54 |
| Page |
pp.46-51 |
| #Pages |
6 |
| Date of Issue |
2026-05-28 (SIS) |