Motoyoshi Isamu, Kingdom Frederick A A
Human and Information Science Laboratory, NTT Communication Science Laboratories, NTT, Atsugi, Japan.
J Vis. 2010 Jan 11;10(1):3.1-8. doi: 10.1167/10.1.3.
The present study analyzes the effect of local pairwise orientation relations on the perception of textural structure. We have employed a new class of stochastic stimuli comprised of paired Gabor patches with a particular orientation difference (theta) and relative angular position (phi). We measured the threshold proportion of signal pairs for discriminating the target texture from a noise texture comprised of randomly oriented pairs. The results showed that observers were sensitive not only to textures containing pairs with curvilinear configurations such as lines and curves (phi = theta / 2), but also to their orthogonal configurations such as V shapes and parallels (phi = theta / 2 + 90). Both classes of configuration exhibit the property of co-circularity, a fundamental geometric feature of edges and contours in natural images. We also found higher sensitivity for textures made from orientation pairs with either large or small orientation differences. These results suggest that in addition to orientation difference, co-circularity plays a critical role in the perception of orientation-based textural structure.
本研究分析了局部成对取向关系对纹理结构感知的影响。我们采用了一类新的随机刺激，其由具有特定取向差异（θ）和相对角位置（φ）的成对Gabor斑块组成。我们测量了用于从由随机取向的对组成的噪声纹理中区分目标纹理的信号对的阈值比例。结果表明，观察者不仅对包含具有曲线配置（如直线和曲线，φ = θ / 2）的对的纹理敏感，而且对其正交配置（如V形和平行线，φ = θ / 2 + 90）也敏感。这两类配置都表现出共圆性的特性，这是自然图像中边缘和轮廓的基本几何特征。我们还发现，对于由具有大或小取向差异的取向对制成的纹理，敏感度更高。这些结果表明，除了取向差异外，共圆性在基于取向的纹理结构感知中起着关键作用。
