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Fig. 5. Results of analyses comparing frog spectral reflectances as discriminated
by frog or bird visual systems. Each panel is a histogram plot of the number
of comparisons (each a pair of spectra) vs. jnds
(`just-noticeable-differences'); see text for details. Data plotted here
represent results for the `Green' illuminant, but overall results were similar
for all illuminants; see also Table
1. (A) Frog spectral pairs, as seen by frog vision. (B) Frog
spectra compared to background spectra, as seen by frog vision. (C) Frog
spectral pairs, as seen by bird vision. (D) Frog spectra compared to
background spectra, as seen by bird vision.
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