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Fig. 7. Results of analyses comparing frog spectral reflectances as discriminated
by frog or bird visual systems, using only `bright' frog colors in the
analysis. 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 3. (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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