PSYB51H3 Lecture Notes - Lecture 3: Visual Acuity, Optic Chiasm, Spatial Frequency
Document Summary
1439 johannes gutenberg invented a printing press with movable types. Huge impact on 15th century europe (1424 cambridge 122 books!: literacy was low before gutenberg, invention of the printing press bettered education, before, monks would rewrite books by hand. Ancient china/korea had similar technology before gutenberg with little impact: too many signs and characters (pictophonetic compounds) Lang can be represented as text, that can be pieced together from a small set of simple and independent (non-redundant) elements. A" does something different, sounds different than b". Visual images can be described/represented as compositions of simple and independent elements. Each of these elements can be filtered out separately. Letter represent text/lang neurons are sensitive to basic visual elements represent visual images of the world. Used independent component analysis (ica) to identify the components of photos of natural images. Shifting orientation of the gratings, added filters, any photo can be recreated.
