Image segmentation and VEP topography.
Image segmentation and VEP topography.
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图像分割和 VEP 地形。
DOI：
10.1016/0042-6989(91)90161-w
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发表时间：
1991
期刊：
影响因子：
1.8
通讯作者：
Baitch,LW
中科院分区：
文献类型：
--
作者：
Srebro,R;Baitch,LW
VEP头皮领域进行了测量，除了单一的对比度属性，允许看到一个方波光栅相同的四种模式的起始-偏移刺激。用于每个刺激的对比度属性是纹理，双眼视差，亮度，或颜色。所有刺激都以动态随机点显示的形式呈现。头皮电位采样在1.5厘米的间隔由66个电极在头皮后部。为每个受试者构建定制的刚性头盔，以确保可重复的电极放置。由于四种刺激的头皮场在所有交叉比较中均显着不同。这表明，在人类的视觉皮层中存在着区域选择性的处理四个不同的对比度属性。
VEP scalp fields were measured for four pattern onset-offset stimuli identical except for the single contrast attribute that allowed a square-wave grating to be seen. The contrast attribute used for each stimulus was either texture, binocular disparity, luminance, or color. All stimuli were presented as dynamic random dot displays. Scalp potentials were sampled at 1.5 cm intervals by 66 electrodes over the posterior scalp. Customized rigid helmets were constructed for each subject to ensure reproducible electrode placement. The scalp fields due to the four stimuli were significantly different in all cross-comparisons. This implies that in the human visual cortex there exists regional selectivity for the processing of the four different contrast attributes.