Contrast discrimination at high contrasts reveals the influence of local light adaptation on contrast processing

@article{Kingdom1996ContrastDA,
  title={Contrast discrimination at high contrasts reveals the influence of local light adaptation on contrast processing},
  author={Frederick A. A. Kingdom and Paul Whittle},
  journal={Vision Research},
  year={1996},
  volume={36},
  pages={817-829}
}
Previous measurements of contrast discrimination threshold, delta C, as a function of pedestal contrast, C, for sine-wave gratings have shown a power law relationship between delta C and C at suprathreshold levels of C. However, these studies have rarely used contrasts greater than 50%. Whittle (1986), using incremental and decremental patches, found that delta C increased with C only up to about 50%. At higher contrasts it decreased. Since a periodic stimulus can be considered to be composed… CONTINUE READING
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