PSYB51H3 Lecture Notes - Lecture 3: Visual Acuity, Spatial Frequency, Visual Angle
Document Summary
The retina processes information similar to a computer. Describe some of the functions of the pathways. One bipolar cell connects to a photoreceptor. The independent components of the visual world. 1439 johannes gutenberg invented a printing press with movable types. Greatest invention in the last 1000 years . th century europe (1424 cambridge 122 books!) Similar technology in ancient china & korea had no comparable impact. In china and korea, movable types not as important as europe. The simpler the alphabet, the easier to recreate text (china has thousands of characters) A page of text can be pieced together from a small set of simple elements. Similarly, visual images can be described/ represented as compositions of simple elements. Each of these elements can be separately filtered out. Word document is much smaller than bitmap (bitmap: notice or memorize what each pixel value is) Sine wave (sinusoidal) grating: gabor (sine wave viewed through a circular aperture defined by a 2d gaussian)
