PSYC2274 Chapter Notes - Chapter 3: Receptive Field, Visual Acuity, Visual Cortex
Document Summary
Acuity smallest spatial detail that can be resolved at 100% contrast. Cycle for a grating, a pair consisting of one dark bar and one bright bar. Simply 1 repetition of a black and a white stripe. Visual angle the angle subtended by an object at the retina. Sine wave grating a grating with a sinusoidal luminance profile. Visual acuity is much poorer in the periphery than in the fovea. Visual acuity is used to specify a spatial limit. The smallest object that one can detect. Specified in terms of the angular size of the target at the retina. But, actually limited by our ability to discriminate the intensity of the target relative to its background. The smallest angular separation between neighboring objects that one can resolve. It is the finest high-contrast detail that can be resolved. The angular size of the smallest feature that one can recognize or identify.
