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| Presentation | 2013-02-18 13:40 AN INTEGER OPERATION OF GLOBAL TONE MAPPING FOR HDR IMAGES Tatsuya Murofushi (Tokyo Metropolitan Univ.), Masahiro Iwahashi (Nagaoka Univ. of Tech.), Hitoshi Kiya (Tokyo Metropolitan Univ.)  ITS2012-38 IE2012-118 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | This paper proposes a new tone mapping operation which is implemented in integer input and integer output. A tone mapping operation (TMO) generates a low dynamic range (LDR) image from a high dynamic range (HDR) image. Since pixel values of an HDR image are generally expressed in a floating point data format, e.g. RGBE, OpenEXR, a TMO is also implemented in floating point calculations in conventional approaches. However, it requires huge memory cost, even though a resulting LDR image is expressed in simple integer. We treat a floating-point number as two integer, one corresponds to the exponent part, the other corresponds to the mantissa part. Our method performs a TMO with integer input and integer output to reduce memory cost. In our experiment, it is confirmed with PSNR and contrast evaluations that the proposed method offers LDR images of visually high quality comparable to the conventional method. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | high dynamic range / tone mapping / integer operation / floating-point / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 112, no. 434, IE2012-118, pp. 221-226, Feb. 2013. | |
| Paper # | IE2012-118 | |
| Date of Issue | 2013-02-11 (ITS, IE) | |
| ISSN | Print edition: ISSN 0913-5685 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 | ITS2012-38 IE2012-118 |
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| Conference Information | |
| Committee | ITS IE ITE-AIT ITE-HI ITE-ME |
| Conference Date | 2013-02-18 - 2013-02-19 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Hokkaido Univ. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | ITS Image Processsing, Image Medium, Vision, etc. |
| Paper Information | |
| Registration To | IE |
| Conference Code | 2013-02-ITS-IE-AIT-HI-ME |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | AN INTEGER OPERATION OF GLOBAL TONE MAPPING FOR HDR IMAGES |
| Sub Title (in English) | |
| Keyword(1) | high dynamic range |
| Keyword(2) | tone mapping |
| Keyword(3) | integer operation |
| Keyword(4) | floating-point |
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| 1st Author's Name | Tatsuya Murofushi |
| 1st Author's Affiliation | Tokyo Metropolitan University (Tokyo Metropolitan Univ.) |
| 2nd Author's Name | Masahiro Iwahashi |
| 2nd Author's Affiliation | Nagaoka University of Technology (Nagaoka Univ. of Tech.) |
| 3rd Author's Name | Hitoshi Kiya |
| 3rd Author's Affiliation | Tokyo Metropolitan University (Tokyo Metropolitan Univ.) |
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| Speaker | Author-1 |
| Date Time | 2013-02-18 13:40:00 |
| Presentation Time | 20 minutes |
| Registration for | IE |
| Paper # | ITS2012-38, IE2012-118 |
| Volume (vol) | vol.112 |
| Number (no) | no.433(ITS), no.434(IE) |
| Page | pp.221-226 |
| #Pages | 6 |
| Date of Issue | 2013-02-11 (ITS, IE) |
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