| Paper Abstract and Keywords |
| Presentation |
2009-12-10 13:30
A high-speed local contrast correction method without local pixel-block dependency
Sousuke Shimoyama, Masayuki Ikebe, Masaki Igarashi, Jyunichi Motohisa (Hokkaido Univ.) |
| Abstract |
(in Japanese) |
(See Japanese page) |
| (in English) |
Local Histogram Equalization (LHE), which is efficient for High Dynamic Range (HDR) compression, requires a large amount of calculation and induces unnatural image quality. Using checker-wise histogram acquisition and line buffer, memory accessing for local histograms is processed in O(1) time. Moreover, for improving image quality, we proposed approximation of LHE by compositing gamma functions. Setting parameters to each luminance tone, image quality is regulated adaptively. Using C++, we achieved two million pixels per 0.3 sec operation and real-time VGA movie processing. |
| Keyword |
(in Japanese) |
(See Japanese page) |
| (in English) |
High Dynamic Range Compression / Local Histogram Equalization (LHE) / Gamma function / / / / / |
| Reference Info. |
ITE Tech. Rep., vol. 33, no. 56, IST2009-91, pp. 5-8, Dec. 2009. |
| Paper # |
IST2009-91 |
| Date of Issue |
2009-12-03 (IST) |
| ISSN |
Print edition: ISSN 1342-6893 |
| Download PDF |
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| Conference Information |
| Committee |
IST |
| Conference Date |
2009-12-10 - 2009-12-11 |
| Place (in Japanese) |
(See Japanese page) |
| Place (in English) |
Univ. of Tokyo |
| Topics (in Japanese) |
(See Japanese page) |
| Topics (in English) |
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| Paper Information |
| Registration To |
IST |
| Conference Code |
2009-12-IST |
| Language |
Japanese |
| Title (in Japanese) |
(See Japanese page) |
| Sub Title (in Japanese) |
(See Japanese page) |
| Title (in English) |
A high-speed local contrast correction method without local pixel-block dependency |
| Sub Title (in English) |
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| Keyword(1) |
High Dynamic Range Compression |
| Keyword(2) |
Local Histogram Equalization (LHE) |
| Keyword(3) |
Gamma function |
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| 1st Author's Name |
Sousuke Shimoyama |
| 1st Author's Affiliation |
Hokkaido University (Hokkaido Univ.) |
| 2nd Author's Name |
Masayuki Ikebe |
| 2nd Author's Affiliation |
Hokkaido University (Hokkaido Univ.) |
| 3rd Author's Name |
Masaki Igarashi |
| 3rd Author's Affiliation |
Hokkaido University (Hokkaido Univ.) |
| 4th Author's Name |
Jyunichi Motohisa |
| 4th Author's Affiliation |
Hokkaido University (Hokkaido Univ.) |
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| Speaker |
Author-1 |
| Date Time |
2009-12-10 13:30:00 |
| Presentation Time |
30 minutes |
| Registration for |
IST |
| Paper # |
IST2009-91 |
| Volume (vol) |
vol.33 |
| Number (no) |
no.56 |
| Page |
pp.5-8 |
| #Pages |
4 |
| Date of Issue |
2009-12-03 (IST) |