Some important properties of human vision brightness

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Some Important Properties of Human Vision Brightness Perception Contrast Encoding The response of the eye to light isn’t absolute—it’s relative to the surrounding intensities Caused by neurological on-center/off-surround areas of response (“receptive fields”) This causes the Mach effect at strong intensity transitions Even our color perception seems to be based on relative differences (to a point)
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Some Important Properties of Human Vision Brightness Perception The Mach Effect Each of these regions has uniform intensity but varying perceived brightness—rapid changes in brightness are accentuated.
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Some Important Properties of Human Vision Spatial Frequency Perception Perception of Different Spatial Frequencies Experimental Structure Stimulus: sinusoidal grating with frequency f and amplitude A Vary A in a 2AFC and find the j.n.d. for each frequency f Plot the sensitivity as a function of frequency f : the contrast sensitivity function (CSF) 0 0.2 0.4 0.6 0.8 1 0 0.2 0.4 0.6 0.8 1
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Some Important Properties of Human Vision Spatial Frequency Perception Contrast Sensitivity Function The CSF is the transfer function for the human visual system.
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  • Winter '08
  • Morse,B
  • important properties, human vision

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