Re: Humans (and cameras and scanners) do not have a color gamut (?)
Re: Humans (and cameras and scanners) do not have a color gamut (?)
- Subject: Re: Humans (and cameras and scanners) do not have a color gamut (?)
- From: Henry Davis via colorsync-users <email@hidden>
- Date: Tue, 7 Jan 2020 17:12:12 -0500
Thanks Iliah, but there’s still something I can’t understand.
> Cameras record measurements of light, according to some function one can call
> "camera observer" or spectral response functions. That's not human observer,
> and thus it's not colour. More, there is no one-to-one transform from camera
> observer to human observer.
> Next:
> The term gamut is applicable to output devices. Cameras and scanners are
> input devices.
I get all of that.
This part is still confusing:
> The closer the transform from camera observer to human observer is to
> one-to-one, the easier it is to speak of “colour accuracy”.
It just seems that there has to be limitations within the response of the
camera. So, don’t call it a gamut - but if there is some limitation what would
it be called.
Is the camera able to respond to the entirety of the visual spectrum
accurately, one-to-one? I get how there is not a one-to-one transform from
camera to the human observer.
The transform that takes place from world to camera is made with numbers. If
those numbers are exactly the same numbers that are used to define/describe the
visible spectrum then I think I can better understand the discussion.
Henry Davis
> On Jan 7, 2020, at 4:51 PM, Iliah Borg <email@hidden> wrote:
>
> Let's start with this:
>
> Cameras record measurements of light, according to some function one can call
> "camera observer" or spectral response functions. That's not human observer,
> and thus it's not colour. More, there is no one-to-one transform from camera
> observer to human observer.
>
> The closer the transform from camera observer to human observer is to
> one-to-one, the easier it is to speak of "colour accuracy".
>
> Next:
> The term gamut is applicable to output devices. Cameras and scanners are
> input devices.
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