Re: 1 billion colors
Re: 1 billion colors
- Subject: Re: 1 billion colors
- From: Roger Breton via colorsync-users <email@hidden>
- Date: Mon, 6 Jan 2020 07:04:31 -0500
... Took the liberty to change the title of the thread.
Out of 16.7 million or 1.07 billion colors, I suspect there are "redundant"
combinations? Such that RGB = A,B,C or G,H,K come out to be the "same"
color, visually? I think it is NOT unintuitive to think that this is in fact
very likely, David? The same could be said of 1 billion colors, there ought
to be combinations of colors that come out to be the same visually? Although
I don't know anyone who ever tested this, extensively. And if I may, I don't
know to what extent can a person with normal color vision be expected to be
able to discriminate among 16.7 million colors?
/ Roger
-----Original Message-----
From: colorsync-users
<colorsync-users-bounces+graxx=email@hidden> On Behalf Of
David Scharf via colorsync-users
Sent: Monday, January 6, 2020 12:13 AM
To: email@hidden; Andrew Rodney <email@hidden>
Cc: David Scharf <email@hidden>
Subject: Re: NEC PA271Q "Native" chromaticities
So you're saying that when these "color" numbers come up that we will see
only gray? Nah, I don't think so. I think that most of us understand the
Physics and and perceptive aspects of color. Perhaps you mean that these
"invisible" colors do not exist as perceptually different from other colors
close by in number?
DAVID SCHARF PHOTOGRAPHY
*DAVID SCHARF*
On 1/5/20 5:26 PM, Andrew Rodney via colorsync-users wrote:
> I'm talking both.
>
> Color, is a perceptual property. So if you can't see it it's not a color.
Color is not a particular wavelength of light. It is a cognitive perception,
the excitation of photoreceptors followed by retinal processing and ending
in the our visual cortex, within our brains. Sounds like biology to me....
As such, colors are defined based on perceptual experiments.
>
> Fairchild's "Color Appearance Models". Page 1!
> "Like beauty, color is in the eye of the beholder. For as long as human
scientific inquiry has been recorded, the nature of color perception has
been a topic of great interest. Despite tremendous evolution of
technology,fundamental issues of color perception remain unanswered. Many
scientific attempts to explain color rely purely on the physical nature of
light and objects. However, without the human observer, there is no color".
> Further on the same page:
> "It is common to say that certain wavelengths of light, or certain objects
are a give color. This is an attempt to relegate color to the purely
physical domain. It is more correct to state those stimuli are perceived to
be a certain color when viewed under specific conditions".
>
> Page 1 paragraph 2 of Digital Color Management by Giorgianni and Madden:
> "But color itself is a perception and perceptions only exist in the mind".
>
> Page 11 of The GATF Practical guide to Color Management:
> "Although extensive research has been conducted, we still not completely
understand what happens in the brain when we "see" color. The visual
sensation known as color occurs when light excites photoreceptors in the eye
called cone cells".
>
> Page 75 of Understanding Color Management by Sharma:
> "Color is an impression that we form in our brains".
>
>
>> On Jan 5, 2020, at 5:57 PM, David Scharf <email@hidden>
wrote:
>>
>> Hi Andrew,
>>
>> I think your talkin color science and engineering and I'm talkin biology.
Inability to differentiate close colors does not mean their non-existence or
imperceptibility. That's not silly, its actual!
>>
>> DAVID SCHARF
>> http://www.electronmicro.com <http://www.electronmicro.com/>
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