Visual signal detection in structured backgrounds. II. Effects of contrast gain control, background variations, and white noise.

@article{Eckstein1997VisualSD,
  title={Visual signal detection in structured backgrounds. II. Effects of contrast gain control, background variations, and white noise.},
  author={Miguel P. Eckstein and A J Ahumada and A. B. Watson},
  journal={Journal of the Optical Society of America. A, Optics, image science, and vision},
  year={1997},
  volume={14 9},
  pages={2406-19}
}
Studies of visual detection of a signal superimposed on one of two identical backgrounds show performance degradation when the background has high contrast and is similar in spatial frequency and/or orientation to the signal. To account for this finding, models include a contrast gain control mechanism that pools activity across spatial frequency, orientation and space to inhibit (divisively) the response of the receptor sensitive to the signal. In tasks in which the observer has to detect a… CONTINUE READING
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