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u |
DEFINITION:
the minimum contrast ratio
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that can
be detected.
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l |
Indicates
the smallest difference between shades
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of gray
that can be detected.
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u |
Depends
on Spatial Frequency
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l |
DEFINITION:
how many pairs of white and black
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bars
fit into 1 deg. of visual angle.
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l |
Low
spatial frequency
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few bars/deg.
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l |
High
spatial frequency
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many
bars/deg.
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