PSYB51H3 Chapter Notes - Chapter 3: Visual Cortex, Visual Acuity, Koniocellular Cell
Document Summary
Week 3 may 22 nd , 2015. Contrast: the difference between an object and the background, or between lighter and darker parts of the same object. Acuity: the smallest spatial detail that can be resolved at 100% contrast: e. g. , doctors specify acuity in terms of 20/20 vision, visual acuity is much poorer in the periphery than in the fovea. Cycle: for grating, a pair consisting of one dark bar and one bright bar: repetition of a black and white stripe, sine wave grating: a grating with a sinusoidal luminance profile. Light intensity varies smoothly and continuously across each cycle. Resolution acuity represents one of the fundamental limits of spatial vision: it is the finest high-contrast detail that can be resolved. Minimum resolvable acuity: the smallest angular separation between neighboring objects that one can resolve: the finest stripes that can be resolved.
