Aizoaceae in bee vision: Images from the Jardin exotique et botanique de Roscoff

[Kai]

Images from the Jardin exotique et botanique de Roscoff (Brittany)

https://en.wikipedia.org/wiki/Jardin_Exotique_de_Roscoff

In the beautifully situated and landscaped garden I took some photos of some Aizoaceae last year.
I photographed through a ZWB3 and TSN 575 filter combination (Canon 6D-FS, EF 28mm 1:2.8, typically with f 9.5 and 1/30 s at 1600 ASA).

I find the wide range of colors exciting and that not all flowers have a different colored nectar guide.

About the colors:
I changed the original colors by swapping channels and making individual adjustments. The spectra show the effect. 
Below: Colors according to WB on PTFE
Above: Colors after channel swap and selective enhancement of the (new) green

 

 

 

 

 

 

 

 

 

 

 

[Doug A]

Superb series. Favorite is the frame filling green and yellow flowers. Looks like a great place to photograph. 

Thanks for sharing,

Doug A

[Foxfire]

These are interesting. Thanks for sharing!

After reading some literature, it turns out that bees have a color vision, and at the same time, polarization vision.  If they process polarization and colors into one, that could be real difficult to imagine.

[Kai]

1 hour ago, Foxfire said:

These are interesting. Thanks for sharing!

After reading some literature, it turns out that bees have a color vision, and at the same time, polarization vision.  If they process polarization and colors into one, that could be real difficult to imagine.

You're right. It is perhaps a bit presumptuous to speak of “bee vision” in this case. Bees have a temporal resolution of around 200 frames per second, they can distinguish polarization, they only have 6000-10000 "pixels" and no focusing. And they move three-dimensionally through three-dimensional space. This is difficult for us to understand...
Of course, these pictures are about color impressions. Maybe they will provide some insight...

[photoni]

Your photos are very beautiful and interesting

I liked the idea of using ZWB3+TSN to emulate the bees' sight,

and changing the original colors by swapping channels

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I didn't quite understand your point.

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On 9/9/2023 at 1:09 AM, Kai said:

Above: Colors after channel swap and selective enhancement of the (new) green

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so I tried to do four types of variations. I imagine yours is the first.

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Thanks

Toni

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[Kai]

5 hours ago, photoni said:

Your photos are very beautiful and interesting

I liked the idea of using ZWB3+TSN to emulate the bees' sight,

and changing the original colors by swapping channels

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I didn't quite understand your point.

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so I tried to do four types of variations. I imagine yours is the first.

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Thanks

Toni

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Hello Toni,
I proceeded as follows:
As a reference I used the spectrum of the sun:


Then I turned the HSL color wheel in my program (DxO PhotoLab) by about 1/3 with respect to the Hue value. So the native red (UV) becomes blue, the native blue becomes green and the green becomes purple-violet.

Then I selectively turned the purple-violet into red and boosted the red and green a bit:

The wavelengths now have the color order as in the visible: short = blue, medium = green and long = red.

 

What's not good: The spectral range 420-470 nm is reproduced too weakly, the bee-green - bee-red transition ist not 500 nm and the the bees eyes are sensitive up to 600 nm (and starts at 300 nm) ...
In any case, I then transferred these settings to the photos.

[Yves W]

Hello Toni, glad to read you,

You may have read that I recovered my 3 ZWB3 after one day in hydrogen peroxide not toxic

Best

[photoni]

2 hours ago, Yves W said:

Hello Toni, glad to read you,

You may have read that I recovered my 3 ZWB3 after one day in hydrogen peroxide not toxic

Best

I don't think that's possible with mine
i tried H2O2 but it doesn't work
the glass surface is corroded - sunken
I'll get a new one

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Thanks @Kai  it's very similar to what I did in the first version... but it's easier.
in photoshop just rotate the hue 120°
and selectively add colors
You make me think about using this technique with BG25 or QB29 + TSN

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