2003 Fiscal Year Final Research Report Summary
Investigation of spatial organization based on chromatic signals
| Project/Area Number |
14510105
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
実験系心理学
|
|---|
| Research Institution | Chiba University (2003)
Osaka Prefecture University (2002) |
|---|
Principal Investigator |
KIMURA Eiji Chiba Univ., Faculty of Letters, Associate Professor, 文学部, 助教授 (80214865)
|
|---|
| Project Period (FY) |
2002 – 2003
|
| Keywords | visual processing / spatial organization / color vision / structure from motion |
|---|
| Research Abstract |
This research project investigated chromatic processing contributing to spatial organization. Spatial organization refers to the visual function which groups visually similar elements together and segregates the group of elements from its surroundings.
In the first study, we investigated the nature of the interaction between luminance and chromatic processings in spatial organization. The results revealed complex and asymmetric interactions. Spatial organization based on chromatic signals was facilitated under some conditions by introducing random luminance noises, whereas organization based on luminance signals was never facilitated by chromatic noises. Moreover, the interaction varied in nature with the spatial configuration of the stimulus When the stimulus elements were densely packed, the facilitatory interaction disappeared and the organization based on chromatic signals was independent of luminance noises over a wide contrast range. In the second study, we investigated whether spatial organization based on chromatic signals affects the recovery of three-dimensional (3-D) structure from motion. The results showed that the spatial organization can modulate the recovery of 3-D structure. When the moving dots of different speeds were segregated due to a difference in color, the recovered 3-D structure was closer in shape to the veridical structure in some spatial configuration.
Overall, the results of this research project elucidated the nature of chromatic processing mediating spatial organization and how it is related to other visual processings. They also suggest that visual processing mediating spatial organization vary in nature with the spatial configuration of the stimulus. We need further studies to understand the effects of the spatial configuration on spatial organization.
|
