Today from my evolving Rudbeckia series a Rudbeckia missouriensis flower portrait in simulated tri- and tetrachromatic vision.
[click on image to see a larger one]
Simulated tetrachromatic vision (i.e. UV=blue, Blue, Green, Red):
Simulated trichromatic vision (i.e. UV=blue, Blue, Green):
For comparison, this is the normal, human vision version (i.e. Blue, Green, Red):
and here also the pure UV (300-400nm) response showing that prominent pattern:
Also here for that flower both simulated tri- and tetrachromatic vision images include that UV pattern plus also the other channels bees (trichromatic) resp. birds/butterflies (tetrachromatic) can see.
Stay tuned, more will follow on that fascinating subject...
More info on this very interesting field may be found on my site http://www.pbase.com/kds315/uv_photos