Y
Yoshimichi Ejima
Researcher at Okayama University
Publications - 112
Citations - 1036
Yoshimichi Ejima is an academic researcher from Okayama University. The author has contributed to research in topics: Computer science & Haptic technology. The author has an hindex of 16, co-authored 100 publications receiving 928 citations. Previous affiliations of Yoshimichi Ejima include Kyoto University & Kyoto Institute of Technology.
Papers
More filters
Journal ArticleDOI
Apparent contrast of a sinusoidal grating in the simultaneous presence of peripheral gratings
TL;DR: Apparent contrast of a vertical sinusoidal grating in the simultaneous presence of peripheral gratings was measured as a function of peripheral contrast, with test contrast, and relative phase and position of the two gratings as parameters.
Journal ArticleDOI
Estimation of the Timing of Human Visual Perception from Magnetoencephalography
TL;DR: The results suggest that the perceptions for visual stimulus appearances are established in extrastriate areas ∼150–200 ms before subjects manually react to the stimulus.
Journal ArticleDOI
Visual structure of a Japanese Zen garden
TL;DR: A model of shape analysis in early visual processing is applied to show that the 'empty' space of the dry landscape garden at Ryoanji Temple is implicitly structured and critically aligned with the temple's architecture.
Journal ArticleDOI
Layer-specific activation of sensory input and predictive feedback in the human primary somatosensory cortex
Yinghua Yu,Yinghua Yu,Yinghua Yu,Laurentius Huber,Jiajia Yang,Jiajia Yang,David C. Jangraw,Daniel A. Handwerker,Peter J. Molfese,Gang Chen,Yoshimichi Ejima,Jinglong Wu,Peter A. Bandettini +12 more
TL;DR: Using laminar fMRI, it is shown that prediction and sensory inputs activate specific layers in human primary somatosensory cortex, and that the sensory input from thalamic projects preferentially activates the middle layer, while the superficial and deep layers in S1 are more engaged for cortico-cortical predictive feedback input.
Journal ArticleDOI
Topographic Representation of an Occluded Object and the Effects of Spatiotemporal Context in Human Early Visual Areas
Hiroshi Ban,Hiroki Yamamoto,Takashi Hanakawa,Shin-ichi Urayama,Toshihiko Aso,Hidenao Fukuyama,Yoshimichi Ejima +6 more
TL;DR: It is suggested that primary “visual” area V1 has the ability to process not only visible or virtually (illusorily) perceived objects but also “invisible” portions of objects without concurrent visual sensation such as luminance enhancement to these portions.