Husk Jesse S, Huang Pi-Chun, Hess Robert F
McGill Vision Research, Department of Ophthalmology, McGill University, Montreal, Quebec, Canada.
J Vis. 2012 Jun 12;12(6):18. doi: 10.1167/12.6.18.
We developed a global orientation coherence task for the assessment of global form processing along similar lines to the global motion coherence task. The task involved judgments of global orientation for an array of limited duration 1-D Gabors, some of which were signal (signal orientation) and some of which were noise (random orientation). We address two issues. First: Do motion and form global processing have similar dependencies? And second: Can global sensitivity be explained solely in terms of integrative function? While most dependencies (e.g., contrast, spatial scale, and field size) are similar for form and motion processing, there is a greater dependence on eccentricity for form processing. Sensitivity for global tasks involves more than just integration by filters broadly tuned for orientation. Results are best modeled by filters with narrowband orientation tuning that effectively segregate as well as integrate global information.
我们开发了一种全局方向一致性任务，用于沿着与全局运动一致性任务相似的思路评估全局形状处理。该任务涉及对一系列持续时间有限的一维Gabors阵列的全局方向进行判断，其中一些是信号（信号方向），一些是噪声（随机方向）。我们探讨两个问题。第一：运动和形状的全局处理是否有相似的依赖性？第二：全局敏感性能否仅根据整合功能来解释？虽然形状和运动处理的大多数依赖性（例如对比度、空间尺度和视野大小）相似，但形状处理对偏心率的依赖性更大。全局任务的敏感性不仅仅涉及通过对方向进行广泛调谐的滤波器进行整合。结果最好用具有窄带方向调谐的滤波器来建模，这些滤波器能有效地分离并整合全局信息。
