计算机科学 ›› 2018, Vol. 45 ›› Issue (8): 223-228.doi: 10.11896/j.issn.1002-137X.2018.08.040
所属专题: 医学图像
郭小英1, 李亮2, 耿海军1
GUO Xiao-ying1, LI Liang2, GENG Hai-jun1
摘要: 探索了当人眼视觉感知纹理图像相似性时纹理特征(整体特征和局部特征)对视觉注意过程及相似性结果选择的影响。采用PGPC纹理合成方法,分别控制纹理的整体特征和局部特征,合成具有相同整体特征和局部特征的纹理。实验分为3组纹理场景,每一组有3幅纹理图像(A,B和S),S为对比纹理图像;实验者带着“纹理A和纹理B,哪个与纹理S更相似”的视觉感知任务观察纹理场景;利用Tobii T60眼动仪记录实验过程中观察者的眼动,跟踪获取89位实验者的眼动数据(眼动数据度量指标包含感兴趣区域内注视点散度和不同感兴趣区域间的眼跳次数);通过Tobii studio导出眼动数据,并基于R软件进行了方差分析和配对T检验等统计分析。通过对3组纹理图像的注视轨迹图及热点图的分析,验证了纹理整体特征和局部特征对视觉感知过程中的注视模式和相似性结果的选择有影响。实验结果表明:1)对于全局特征与对比纹理图像一致的纹理,其眼动注视点分散,而对于局部特征与对比纹理图像一致的纹理,其眼动注视点集中。2)纹理组相似性的最终选择结果与纹理组内不同纹理图像间的视觉搜索行为有关。
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