| Paper Abstract and Keywords |
| Presentation |
2020-02-27 11:10
Contrast sensitivity functions measured on luminance-variegated background
Misaki Hayasaka (Yamagata Univ.), Takehiro Nagai (Tokyo Tech), Tomoharu Sato (NIT, Ichinoseki College), Tomonori Tashiro, Yasuki Yamauchi (Yamagata Univ.), Ichiro Kuriki (Tohoku Univ.) |
| Abstract |
(in Japanese) |
(See Japanese page) |
| (in English) |
In classical studies, contrast sensitivity functions (CSFs) were measured under full adaptation to a uniform background. Thus, it is unclear whether they reflect sensitivity characteristics in a scene with variegated luminance such as our daily life environment. Here, we psychophysically investigated the effects of the dynamic range widths of the textured background on CSFs. The test stimulus was a Gabor patch on a uniform rectangle pedestal, whose luminance was randomly chosen from five levels in each trial. The background was either of horizontal textures with different luminance dynamic range widths. In the results, the sensitivity was maximum at the pedestal luminance close to the mean luminance of the background for lower spatial frequency targets, but not for higher spatial frequency targets. These results suggest that the mechanisms of sensitivity optimization to the background luminance distributions differ among spatial frequencies of target stimuli. |
| Keyword |
(in Japanese) |
(See Japanese page) |
| (in English) |
Contrast sensitivity function / Luminance / Spatial frequency / Adaptation / Psychophysics / / / |
| Reference Info. |
ITE Tech. Rep., vol. 44, no. 6, HI2020-27, pp. 157-162, Feb. 2020. |
| Paper # |
HI2020-27 |
| Date of Issue |
2020-02-20 (MMS, HI, ME, AIT) |
| ISSN |
Print edition: ISSN 1342-6893 Online edition: ISSN 2424-1970 |
| Download PDF |
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| Conference Information |
| Committee |
HI IEICE-IE IEICE-ITS MMS ME AIT |
| Conference Date |
2020-02-27 - 2020-02-28 |
| Place (in Japanese) |
(See Japanese page) |
| Place (in English) |
Hokkaido Univ. |
| Topics (in Japanese) |
(See Japanese page) |
| Topics (in English) |
Image Processing, etc. |
| Paper Information |
| Registration To |
HI |
| Conference Code |
2020-02-HI-IE-ITS-MMS-ME-AIT |
| Language |
Japanese |
| Title (in Japanese) |
(See Japanese page) |
| Sub Title (in Japanese) |
(See Japanese page) |
| Title (in English) |
Contrast sensitivity functions measured on luminance-variegated background |
| Sub Title (in English) |
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| Keyword(1) |
Contrast sensitivity function |
| Keyword(2) |
Luminance |
| Keyword(3) |
Spatial frequency |
| Keyword(4) |
Adaptation |
| Keyword(5) |
Psychophysics |
| Keyword(6) |
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| Keyword(7) |
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| 1st Author's Name |
Misaki Hayasaka |
| 1st Author's Affiliation |
Yamagata University (Yamagata Univ.) |
| 2nd Author's Name |
Takehiro Nagai |
| 2nd Author's Affiliation |
Tokyo Institute of Technology (Tokyo Tech) |
| 3rd Author's Name |
Tomoharu Sato |
| 3rd Author's Affiliation |
National Institute of Technology, Ichinoseki College (NIT, Ichinoseki College) |
| 4th Author's Name |
Tomonori Tashiro |
| 4th Author's Affiliation |
Yamagata University (Yamagata Univ.) |
| 5th Author's Name |
Yasuki Yamauchi |
| 5th Author's Affiliation |
Yamagata University (Yamagata Univ.) |
| 6th Author's Name |
Ichiro Kuriki |
| 6th Author's Affiliation |
Tohoku University (Tohoku Univ.) |
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| Speaker |
Author-1 |
| Date Time |
2020-02-27 11:10:00 |
| Presentation Time |
15 minutes |
| Registration for |
HI |
| Paper # |
MMS2020-27, HI2020-27, ME2020-55, AIT2020-27 |
| Volume (vol) |
vol.44 |
| Number (no) |
no.6 |
| Page |
pp.157-162 |
| #Pages |
6 |
| Date of Issue |
2020-02-20 (MMS, HI, ME, AIT) |