Spatial frequency, phase, and the contrast of natural images.

@article{Bex2002SpatialFP,
  title={Spatial frequency, phase, and the contrast of natural images.},
  author={Peter J. Bex and Walter Makous},
  journal={Journal of the Optical Society of America. A, Optics, image science, and vision},
  year={2002},
  volume={19 6},
  pages={1096-106}
}
We examined contrast sensitivity and suprathreshold apparent contrast with natural images. The spatial-frequency components within single octaves of the images were removed (notch filtered), their phases were randomized, or the polarity of the images was inverted. Of Michelson contrast, root-mean-square (RMS) contrast, and band-limited contrast, RMS… CONTINUE READING