fMRI揭示视觉信息处理过程
其他题名Visual Information Processing Mechanism Revealed by fMRI Data
Jinpeng Li; Zhaoxiang Zhang; Huiguang He
2016
会议名称2016年第一届北京视觉科学会议
会议日期2016-07
会议地点北京
其他摘要PURPOSE: The understanding of the information-processing mechanism of human visual system is a major cognitive neuroscience and physiology research topic. The insight of the structure and function of human visual cortex might also help us explain the state-of-art performances of recent deep neural networks.
METHODS: The human subject looked at a sequence of natural images whose content includes animals, buildings, food, humans, indoor scenes, manmade objects, outdoor scenes and textures. We analyzed the functional Magnetic Resonance Imaging (fMRI) data of both the ventral pathway (V1-V2-V4-LO) and the dorsal pathway (V1-V2-V3-V3a/b) on the visual cortex, and performed PCA-SVM on the basis of voxel activities of di?erent regions to conclude the trend of classi?cation accuracy. The canonical correlation analysis (CCA) was also used to estimate the linear correlationship among considered regions.
RESULTS: We found that the classification performance improved hierarchically from lower-level regions to higher-level regions in both pathways, among which the LO, V3a and V3b BOLD signals were good classification basis no worse than the widely-used features such as GIST, HOG and LBP. Simultaneously, the performances of V3a and V3b voxels were very close to those of LO voxels. CCA results also showed relatively strong linear correlationship between V3a/b and V4/LO.
CONCLUSIONS: Primarily, the visual cortex disposes visual information hierarchically. When we tracked the information stream in the visual system, the representations of the stimulus grew more and more abstract and global for recognition, so the layer-stacked deep neural networks were better models for visual cortex than traditional shallow ones. Moreover, V3a and V3b located at the dorsal pathway were also involved in object recognition, which was further confirmed by CCA results. Consequently, when it comes to object recognition, we should consider the coordination mechanism between the two pathways rather than focusing on the ventral pathway alone.
会议主办者中国科学院心理研究所
关键词visual cortex ventral pathway dorsal pathway fMRI classification
学科领域感知觉心理学
URL查看原文
收录类别其他
语种英语
文献类型会议论文
条目标识符http://ir.psych.ac.cn/handle/311026/20846
专题心理所主办、承办、协办学术会议_2016年第一届北京视觉科学会议_会议摘要
作者单位Research Center for Brain-inspired Intelligence, Chinese Academy of Sciences, No. 95 Zhongguancun East Road, Haidian Dist., Beijing, China, 100190 University of Chinese Academy of Sciences
推荐引用方式
GB/T 7714
Jinpeng Li,Zhaoxiang Zhang,Huiguang He. fMRI揭示视觉信息处理过程[C]. 见:2016年第一届北京视觉科学会议. 北京. 2016-07.http://vision.csp.escience.cn/dct/page/1.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Jinpeng Li]的文章
[Zhaoxiang Zhang]的文章
[Huiguang He]的文章
百度学术
百度学术中相似的文章
[Jinpeng Li]的文章
[Zhaoxiang Zhang]的文章
[Huiguang He]的文章
必应学术
必应学术中相似的文章
[Jinpeng Li]的文章
[Zhaoxiang Zhang]的文章
[Huiguang He]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。