Berkeley Mike
Member
Rainbows are spectral colors, magenta is not spectral, it is a mixture of primary colors.Not in the rainbow...but in the sunset.
Rainbows are spectral colors, magenta is not spectral, it is a mixture of primary colors.Not in the rainbow...but in the sunset.
Got the book and it is superb, especially for the issues we are discussing here.Hi, I'm not getting what it is exactly, or even roughly, what you're really trying to find out. Or if you just want to have some back and forth exchanges.
At any rate, since you didn't respond to the book recommendation I made, let me say that the author is a neurobiologist. Here's an excerpt from the website:
https://neuro.hms.harvard.edu/people/faculty/margaret-livingstone
The book, written for the general public, discusses some aspects of our vision that one would likely not guess on their own. Again, no direct application to photography (that I see) but perhaps useful in gaining a further understanding.
Got the book and it is superb, especially for the issues we are discussing here.
How about this nugget, paraphrased: light passes through the retina, 3 layers of cells ... etc.
The colorblind part of our visual system — commonly called the “where” stream — is something we have in common with all mammals, says Livingstone. We use “where” information to locate things in space, navigate our environments and track movement. The part of our visual systems that carries color information is a more recent development — the “what” stream — and it’s found only in the brains of primates. It’s this “what” stream that helps us determine what objects are.
This is definitely worth a read and lays some foundations for this discussion.Hi, I think that makes it sound too techie, and may scare off readers. Whereas it seemed to me much more approachable from the viewpoint of appreciating certain techniques in art.
I think that perhaps many of the ideas are too intangible for a text forum, and perhaps better suited for the local tavern, or whatever, with face to face conversation and lots of animated gesturing, etc. At last that's where I'd rather do it anyway.
Here's a little blurb from an online article, link below. I think it explains this part better than I did:
The excerpt is from here: https://www.apa.org/monitor/2010/02/painters.aspx
Our rods are sensitive to luminosity, how bright and how dark an experience is and, therefor, contrast. Cones are sensitive to qualitative color but doesn't care about movement. Two colors can have identical luminosity but one can appear brighter than another. For example when a red hue and a blue hue have the same brightness, the red seems brighter. That said we are talking about two different kinds of contrast. A color image reduced to rods luminous response can conflict with that of the color response. Artist do interesting thing with that, especially the Impressionists.I don't accept the premise about low light and color. I think any issue is more about amount of white, perhaps contrast. Many are unaware of those factors because they mistakenly assume they're not controllable in color.
That is a very low level. I do not remember ever seeing in black and white. Going forward, I'll try to be more self-aware.I will define low light as light below which we see color; we are only using rods and not cones.
Our rods are sensitive to luminosity, how bright and how dark an experience is and, therefor, contrast. Cones are sensitive to qualitative color but doesn't care about movement. Two colors can have identical luminosity but one can appear brighter than another. For example when a red hue and a blue hue have the same brightness, the red seems brighter. That said we are talking about two different kinds of contrast. A color image reduced to rods luminous response can conflict with that of the color response. Artist do interesting thing with that, especially the Impressionists.
I will define low light as light below which we see color; we are only using rods and not cones.
It also seems like you've ignored the fact that some animals (humans?) have rods that are specifically intended to discern movement. Frogs have them, cats have them...I wonder if we do?
Internalizing (evolutionly-speaking) the concept of the compound eye, perhaps? The dragonfly catches movement as light shifts in the visual mosiac imposed on its brain by the 30,000 facets (ommatidia). Great for movement, but not detail -- but details will be sorted out once the prey is caught.
So a photograph that gives the viewer a sense on motion -- that keeps the viewer's eyes moving around the print from the moment the viewer sees the print -- could be addressing the more primitive/deep-seated rod-reaction tied to movement. This could be intensified by a B&W print without the 'what' reaction of the cones to interfer.
How does that sound?
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