基于fMRI的图像底层特征关注研究

Research on imagine attention of low-level features based on fM RI

利用fMRI技术对人脑认知机制进行研究,分析人脑在进行图像认知时所关注的图像特征。首先通过1个功能磁共振成像实验为每个被试定位了脑内的形状、纹理和颜色的感知区域,将这些区域作为研究中的感兴趣区域。然后通过另1个功能磁共振成像实验计算了被试在观看人脸、公共汽车、恐龙及山脉冰川图像刺激时感兴趣区域内的平均信号变化的比例。通过进行数据分析,确定了被试在观看不同类别的图像时,对图像底层特征的关注是不相同的。

The cognitive mechanisms of human brain based on fMRI were studied to get the image features that the sub-jects paied attention to when they saw the images.The shape, texture and color perception regions were located in the brain for every subject through one fMRI experiment, and these regions were defined as interest regions.The mean per-cent bold signal changed in interest regions was calculated when the subjects were watching face, bus, dinosaur and mountain images through another fMRI experiment.The image features that the subjects pay attention to were different when they saw different images.