Discrimination of Complex Patterns: Orientation Information is Integrated across Spatial Scale; Spatial-Frequency and Contrast Information are Not

摘要: Real-world objects are complex, containing information at multiple orientations and spatial scales. It is well established that initial cortical stages of processing, local about an image separately represented However, it not yet how these early representations later integrated across scale to signal useful complex stimulus features, such as edges textures. In the studies reported here, we investigate scale-integration processes involved in distinguishing among patterns. We use a concurrent-response paradigm which observers simultaneously judge two components compound gratings differ widely frequency. different experiments, each component takes one slightly values along dimensions frequency, contrast, or orientation. Using analyses developed within framework multivariate extension signal-detection theory, ask f...