Example 6. Discrimination of image approximations


The subject was shown an image of a natural scene and an approximation of this image based on principal component analysis. The task was to distinguish between the images.


data( "06_Nascimento" )


Data frame with three columns for 8 stimulus levels: x: Stimulus level. r: Number of successes. m: Number of trials.


Nascimento, S.M.C., Foster, D.H., \& Amano, K. “Psychophysical estimates of the number of spectral-reflectance basis functions needed to reproduce natural scenes”, Journal of the Optical Society of America A-Optics Image Science and Vision, 22 (6), 1017-1022, 2005.

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