Youtube video on color

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D Cox Forum Pro • Posts: 27,107
Youtube video on color
2

An impressive 7 minute video on color theory by "Captain Disillusion".

It goes very fast, the graphics are first class, and a great deal of work has gone into making it.

https://www.youtube.com/watch?v=FTKP0Y9MVus&feature=youtu.be

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Jack Hogan Veteran Member • Posts: 7,525
Re: Youtube video on color
2

Loved it. The question is, who is Captain D?

And for the record, anybody who wants to see indoor cold and hot water plumbing well before Newton's time can just head over to Herculaneum and Pompeii, Italy. Both had it before the eruption of Vesuvius almost 2000 years ago, in 79 AD.

Jack

OP D Cox Forum Pro • Posts: 27,107
Re: Youtube video on color

Jack Hogan wrote:

Loved it. The question is, who is Captain D?

There's a Wikipedia page about him.

And for the record, anybody who wants to see indoor cold and hot water plumbing well before Newton's time can just head over to Herculaneum and Pompeii, Italy. Both had it before the eruption of Vesuvius almost 2000 years ago, in 79 AD.

Jack

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57even Forum Pro • Posts: 14,783
Re: Youtube video on color
1

D Cox wrote:

An impressive 7 minute video on color theory by "Captain Disillusion".

It goes very fast, the graphics are first class, and a great deal of work has gone into making it.

https://www.youtube.com/watch?v=FTKP0Y9MVus&feature=youtu.be

While I appreciate the effort, is this is too technical for nine year olds, but seems like it's aimed at them.

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Erik Kaffehr
Erik Kaffehr Veteran Member • Posts: 4,738
Re: Youtube video on color
1

57even wrote:

D Cox wrote:

An impressive 7 minute video on color theory by "Captain Disillusion".

It goes very fast, the graphics are first class, and a great deal of work has gone into making it.

https://www.youtube.com/watch?v=FTKP0Y9MVus&feature=youtu.be

While I appreciate the effort, is this is too technical for nine year olds, but seems like it's aimed at them.

I guess it was intended for Phase One color research scientists...

https://www.phaseone.com/en/Photography/Camera-Technology/Trichromatic-Technology

Best regards

Erik

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57even Forum Pro • Posts: 14,783
Re: Youtube video on color

Erik Kaffehr wrote:

57even wrote:

D Cox wrote:

An impressive 7 minute video on color theory by "Captain Disillusion".

It goes very fast, the graphics are first class, and a great deal of work has gone into making it.

https://www.youtube.com/watch?v=FTKP0Y9MVus&feature=youtu.be

While I appreciate the effort, is this is too technical for nine year olds, but seems like it's aimed at them.

I guess it was intended for Phase One color research scientists...

https://www.phaseone.com/en/Photography/Camera-Technology/Trichromatic-Technology

Best regards

Erik

Oh dear lord! I see what you mean. Though I can't believe they got one of their engineers to write that - maybe the intern...?

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Erik Kaffehr
Erik Kaffehr Veteran Member • Posts: 4,738
Re: Youtube video on color

57even wrote:

Erik Kaffehr wrote:

57even wrote:

D Cox wrote:

An impressive 7 minute video on color theory by "Captain Disillusion".

It goes very fast, the graphics are first class, and a great deal of work has gone into making it.

https://www.youtube.com/watch?v=FTKP0Y9MVus&feature=youtu.be

While I appreciate the effort, is this is too technical for nine year olds, but seems like it's aimed at them.

I guess it was intended for Phase One color research scientists...

https://www.phaseone.com/en/Photography/Camera-Technology/Trichromatic-Technology

Best regards

Erik

Oh dear lord! I see what you mean. Though I can't believe they got one of their engineers to write that - maybe the intern...?

No, not the intern...

https://youtu.be/HHM-vp9lWkk?t=121

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TheGrammarFairy Regular Member • Posts: 360
Re: Youtube video on color

It was interesting to hear Niels Knudsen, VP of Innovation say that some systems sacrifice color quality for higher ISOs. Do we think that's accurate?

Erik Kaffehr wrote:

https://www.phaseone.com/en/Photography/Camera-Technology/Trichromatic-Technology

Best regards

Erik

Oh dear lord! I see what you mean. Though I can't believe they got one of their engineers to write that - maybe the intern...?

N

fPrime
fPrime Veteran Member • Posts: 3,466
Re: Youtube video on color

TheGrammarFairy wrote:

It was interesting to hear Niels Knudsen, VP of Innovation say that some systems sacrifice color quality for higher ISOs. Do we think that's accurate?

It's both accurate and an established fact.

https://www.dpreview.com/forums/post/60658069

fPrime

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Erik Kaffehr
Erik Kaffehr Veteran Member • Posts: 4,738
Re: Youtube video on color

Hi,

Much of it is simply fake.

Eaxmples:

The figure on the right may have some similarity to a camera sensor with sensor glass removed , thus without IR filtering.
The image on the left is broadly similar to traditional CFA designs.

This is a fairly typical CFA transmission curve for most Nikon sensors. Phase one does not publish any CFA transmission curves .

Overlap on sensors is needed, else they would not be able to reproduce spectral colors.

Ideally, spectral response curves should be similar to human vision:

But, that is not really practical.

Best regards

Erik

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TheGrammarFairy Regular Member • Posts: 360
Even More Fascinating

Ideally, spectral response curves should be similar to human vision but that's not practical...

I get the sense that there's a lot to learn from such a seemingly simple statement.  Obviously, if it were possible to make the curves identical to human vision it would have been done long ago.

What is the biggest obstacle to making them similar? And are there other technologies or methods that would allow better curve matching? (I always hope the answer will be to shoot my exposures through some combo of RGB and CMY filters).

Overlap on sensors is needed, else they would not be able to reproduce spectral colors.

Ideally, spectral response curves should be similar to human vision:

But, that is not really practical.

Erik Kaffehr
Erik Kaffehr Veteran Member • Posts: 4,738
Re: Even More Fascinating

TheGrammarFairy wrote:

Ideally, spectral response curves should be similar to human vision but that's not practical...

I get the sense that there's a lot to learn from such a seemingly simple statement. Obviously, if it were possible to make the curves identical to human vision it would have been done long ago.

What is the biggest obstacle to making them similar? And are there other technologies or methods that would allow better curve matching? (I always hope the answer will be to shoot my exposures through some combo of RGB and CMY filters).

I don't know. But, you may notice that there is a lot of overlap between M and L. I would think it would be challenging to get good separation between red and green.

I would think we would rather model the sensor on the CIE 1931 color observer:

Note that this figure uses colors. So you would this weighting functions to project an observation in three primaries.

This article by Jack Hogan discusses it in some good detail.

The reason Jack looked into this was the original information from Phase One on the 'Thrichromatic'. It caused a lot of discussion and testing. Jim Kasson and Jack Hogan cooperated on modelling color responses for different CFA designs:

https://www.strollswithmydog.com/phase-one-iq3-100mp-trichromatic-linear-color-i/

https://www.strollswithmydog.com/phase-one-iq3-100mp-trichromatic-linear-color-ii/

https://www.strollswithmydog.com/phase-one-iq3-100mp-trichromatic-linear-color-iii/
Personally, I think that the major change on the Thrichromatic may have been on the UV and IR filtering as I have seen examples where the Thrichromatic was showing much less purple fringing.

Best regards

Erik

Overlap on sensors is needed, else they would not be able to reproduce spectral colors.

Ideally, spectral response curves should be similar to human vision:

But, that is not really practical.

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