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{{ExpPsy}}
 
{{ExpPsy}}
   
'''Contrast sensitivity''' is the ability to discern between [[luminosity|luminosities]] of different levels in a static [[image]]. Contrast sensitivity varies between individuals, maxing out at approximately 20 years of age, and at [[spatial frequency|spatial frequencies]] of about 2-5 cycles/degree.
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'''Contrast sensitivity''' is the ability to discern between luminosities of different levels in a static image. Contrast sensitivity varies between individuals, maxing out at approximately 20 years of age, and at [[spatial frequency|spatial frequencies]] of about 2-5 cycles/degree.
   
 
The '''contrast threshold function''' ([[CSF]]), also called the '''modular transfer function''' is derived from a graph plotting the relationship between the horizontal axis of spatial frequencies of simple figures (eg a grating, with different sized gaps between the bars) and the vertical axis of a subjects sensitivity to perceiving the fluctuations in [[luminance]] across the images.
 
The '''contrast threshold function''' ([[CSF]]), also called the '''modular transfer function''' is derived from a graph plotting the relationship between the horizontal axis of spatial frequencies of simple figures (eg a grating, with different sized gaps between the bars) and the vertical axis of a subjects sensitivity to perceiving the fluctuations in [[luminance]] across the images.

Latest revision as of 19:31, February 1, 2007

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Contrast sensitivity is the ability to discern between luminosities of different levels in a static image. Contrast sensitivity varies between individuals, maxing out at approximately 20 years of age, and at spatial frequencies of about 2-5 cycles/degree.

The contrast threshold function (CSF), also called the modular transfer function is derived from a graph plotting the relationship between the horizontal axis of spatial frequencies of simple figures (eg a grating, with different sized gaps between the bars) and the vertical axis of a subjects sensitivity to perceiving the fluctuations in luminance across the images.

This is thus the reciprocal of the absolute threshold.


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