PSYB51H3 Lecture Notes - David H. Hubel, Receptive Field, Simple Cell

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22 Oct 2012
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The retina processes information similar to a computer. Describe some of the functions of the pathways. Photoreceptors transform physical energy into neuro signlas which passes on the info. Difference between this and computer, computers have about 4 central processing units. The retina has millions of the central processing units (nucleus of every cell. 3 types of gratins: rectangular, sine wave, gabor (combination of sine an gaussian) Frequency is important to recognize a scence and helps us with efficient codings. Cnan creae a computer code with less memory effort. Info on lower frequency channels tell us that it is lincoln"s face, Higher spatial frequencies tell us that we are looking at squares. This inhibits our ability to recognize the face. Not really, but if you look ar the corner of face she looks like she is smiling. This happens because da vinci used many layers to superimpose the paints.