Every work plotted by its measured colour saturation and tonal contrast — the numbers reveal the painter's hand.
Specimens 150Axis X SaturationAxis Y ContrastMode Spectro-Plot
Color Saturation
Tonal Contrast
Muted
Vivid
Dramatic
Soft
These are not impressions — they are measurements. The cluster reveals George Catlin's optical signature: a coordinate in colour-space where the painter's hand returns again and again.