| Paper Abstract and Keywords |
| Presentation |
2009-03-19 10:20
Discriminating natural image statistics from neural population codes
Satohiro Tajima (The Univ. Tokyo), Masato Okada (The Univ. Tokyo/RIKEN) |
| Abstract |
(in Japanese) |
(See Japanese page) |
| (in English) |
The power law in the amplitude spectra of natural scenes provides not just an efficient description of them but also a foundation for image processing. Psychophysical studies show that the the forms of the amplitude spectra are clearly related to the human visual performances. However, the underlying neuronal mechanism and computation that account for the perception of the natural image statistics is poorly known. We propose a theoretical framework for neuronal encoding and decoding of the natural image statistics, hypothesizing the elicited population activities
of spatial-frequency selective neurons observed in early visual cortex. The predictions by the computational model are consistent to the experimental data reported in the previous study. Especially, the qualitative disparities between performances in fovea and parafovea can be explained based on the distributional difference over preferred frequencies of neurons. The model predicts that the frequency-tuned neurons have asymmetric tuning curves for the amplitude spectrum slopes. |
| Keyword |
(in Japanese) |
(See Japanese page) |
| (in English) |
natural image statistics / texture perception / spatial frequency / amplitude spectra / population code / Fisher information / primary visual cortex / fovea-parafovea |
| Reference Info. |
ITE Tech. Rep., vol. 33, no. 17, HI2009-75, pp. 29-32, March 2009. |
| Paper # |
HI2009-75 |
| Date of Issue |
2009-03-11 (HI) |
| ISSN |
Print edition: ISSN 1342-6893 |
| Download PDF |
|
| Conference Information |
| Committee |
HI |
| Conference Date |
2009-03-18 - 2009-03-19 |
| Place (in Japanese) |
(See Japanese page) |
| Place (in English) |
Tokyo Institute of Technology |
| Topics (in Japanese) |
(See Japanese page) |
| Topics (in English) |
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| Paper Information |
| Registration To |
HI |
| Conference Code |
2009-03-HI |
| Language |
Japanese |
| Title (in Japanese) |
(See Japanese page) |
| Sub Title (in Japanese) |
(See Japanese page) |
| Title (in English) |
Discriminating natural image statistics from neural population codes |
| Sub Title (in English) |
|
| Keyword(1) |
natural image statistics |
| Keyword(2) |
texture perception |
| Keyword(3) |
spatial frequency |
| Keyword(4) |
amplitude spectra |
| Keyword(5) |
population code |
| Keyword(6) |
Fisher information |
| Keyword(7) |
primary visual cortex |
| Keyword(8) |
fovea-parafovea |
| 1st Author's Name |
Satohiro Tajima |
| 1st Author's Affiliation |
The University of Tokyo (The Univ. Tokyo) |
| 2nd Author's Name |
Masato Okada |
| 2nd Author's Affiliation |
The University of Tokyo/RIKEN (The Univ. Tokyo/RIKEN) |
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| Speaker |
Author-1 |
| Date Time |
2009-03-19 10:20:00 |
| Presentation Time |
20 minutes |
| Registration for |
HI |
| Paper # |
HI2009-75 |
| Volume (vol) |
vol.33 |
| Number (no) |
no.17 |
| Page |
pp.29-32 |
| #Pages |
4 |
| Date of Issue |
2009-03-11 (HI) |