spectral cameras

RGB color cameras has proved to be good on smart phones for consumers.

Is sensor resolution nearing the point to measure spectral visible
wavelengths instead of tricolor and is there a market for professional use?

Does the research indicate that it is time to prepare the workflow for them?


--
Minister Dale Kelly, Ph.D.
https://www.dalekelly.org/
Board Certified Holistic Health Practitioner
Board Certified Alternative Medical Practitioner

In article ,
says...

RGB color cameras has proved to be good on smart phones for consumers.

Is sensor resolution nearing the point to measure spectral visible
wavelengths instead of tricolor and is there a market for professional use?

That doesn't depend on the sensor resolution. But you could make
a sensor cell which is capable to measure light of (a limited
number of) different wavelengths. Foveon is one example and the
organic, multiple layer sensor design of Panasonic another one.
--
Alfred Molon

Olympus 4/3 and micro 4/3 cameras forum at
https://groups.io/g/myolympus
https://myolympus.org/ photo sharing site

On 4/7/2020 4:17 PM, Alfred Molon wrote:
In article ,
says...

RGB color cameras has proved to be good on smart phones for consumers.

Is sensor resolution nearing the point to measure spectral visible
wavelengths instead of tricolor and is there a market for professional use?

That doesn't depend on the sensor resolution. But you could make
a sensor cell which is capable to measure light of (a limited
number of) different wavelengths. Foveon is one example and the
organic, multiple layer sensor design of Panasonic another one.


kinda figured it wasn't a unique idea


--
Minister Dale Kelly, Ph.D.
https://www.dalekelly.org/
Board Certified Holistic Health Practitioner
Board Certified Alternative Medical Practitioner

On 4/7/2020 5:09 PM, dale wrote:
On 4/7/2020 4:17 PM, Alfred Molon wrote:
In article ,
says...

RGB color cameras has proved to be good on smart phones for consumers.

Is sensor resolution nearing the point to measure spectral visible
wavelengths instead of tricolor and is there a market for
professional use?

That doesn't depend on the sensor resolution. But you could make
a sensor cell which is capable to measure light of (a limited
number of) different wavelengths. Foveon is one example and the
organic, multiple layer sensor design of Panasonic another one.


kinda figured it wasn't a unique idea




back to resolution ...

the visible spectrum

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

is from 380nm-720nm wavelengths

if you sample that in 10nm increments, that a low end spectrometer 20
some years ago for approx $10K would do ...

wouldn't you need 34 dots per pixel? In printing and publishing a
typical rosette pattern CMYK pixel requires 8 dots ...





--
Minister Dale Kelly, Ph.D.
https://www.dalekelly.org/
Board Certified Holistic Health Practitioner
Board Certified Alternative Medical Practitioner

On 07/04/2020 20:05, dale wrote:
RGB color cameras has proved to be good on smart phones for consumers.

Is sensor resolution nearing the point to measure spectral visible
wavelengths instead of tricolor and is there a market for professional use?

They are called spectrometers and already in use where there is a
scientific requirement to do so.

Does the research indicate that it is time to prepare the workflow for
them?

Utterly pointless. So many combinations of mixtures of different
wavelengths map to the same perceived colour to be worthwhile.

--
Regards,
Martin Brown

In article ,
says...
back to resolution ...

the visible spectrum

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

is from 380nm-720nm wavelengths

if you sample that in 10nm increments, that a low end spectrometer 20
some years ago for approx $10K would do ...

wouldn't you need 34 dots per pixel? In printing and publishing a
typical rosette pattern CMYK pixel requires 8 dots ...

It wouldn't be a good idea to split up each pixel into 34
subpixels, each only capturing a very narrow wavelength range.

Most incoming photons would not be used, i.e. the sensor would
have a low spectral efficiency.
--
Alfred Molon

Olympus 4/3 and micro 4/3 cameras forum at
https://groups.io/g/myolympus
https://myolympus.org/ photo sharing site

On 08/04/2020 06:24, dale wrote:
On 4/7/2020 5:09 PM, dale wrote:
On 4/7/2020 4:17 PM, Alfred Molon wrote:
In article ,
says...

RGB color cameras has proved to be good on smart phones for consumers.

Is sensor resolution nearing the point to measure spectral visible
wavelengths instead of tricolor and is there a market for
professional use?

That doesn't depend on the sensor resolution. But you could make
a sensor cell which is capable to measure light of (a limited
number of) different wavelengths. Foveon is one example and the
organic, multiple layer sensor design of Panasonic another one.


kinda figured it wasn't a unique idea

back to resolution ...

the visible spectrum

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

is from 380nm-720nm wavelengths

if you sample that in 10nm increments, that a low end spectrometer 20
some years ago for approx $10K would do ...

Here is how they actually do serious spectroscopy with plenty of light.

https://www.noao.edu/image_gallery/html/im0609.html

Its a low dispersion prism and a high resolution grating combo to
illuminate a conventional 2D CCD with the entire stellar spectrum.

The other technology uses fibre optics to route positions on the sky
onto a line at the input to a classic high dispersion spectrometer so
that individual targets of interest can be done simultaneously.

You would gain very little useful improvement by sampling at 10nm since
most LED emitters (apart from spot frequency lasers) have FWHM of 50nm
and dyes and pigments are considerably worse.

--
Regards,
Martin Brown

On 4/8/2020 1:28 PM, Alfred Molon wrote:
In article ,
says...
back to resolution ...

the visible spectrum

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

is from 380nm-720nm wavelengths

if you sample that in 10nm increments, that a low end spectrometer 20
some years ago for approx $10K would do ...

wouldn't you need 34 dots per pixel? In printing and publishing a
typical rosette pattern CMYK pixel requires 8 dots ...

It wouldn't be a good idea to split up each pixel into 34
subpixels, each only capturing a very narrow wavelength range.

Most incoming photons would not be used, i.e. the sensor would
have a low spectral efficiency.


what about analog capture through a prism then digital rendering in the
camera's software driver to the seven optical wavelength colors?

https://en.wikipedia.org/wiki/Prism#...tual_waves.gif

red
orange
yellow
green
blue
indigo
violet


--
Minister Dale Kelly, Ph.D.
https://www.dalekelly.org/
Board Certified Holistic Health Practitioner
Board Certified Alternative Medical Practitioner

On 13/04/2020 12:29 pm, dale wrote:
On 4/8/2020 1:28 PM, Alfred Molon wrote:
In article ,
says...
back to resolution ...

the visible spectrum

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

is from 380nm-720nm wavelengths

if you sample that in 10nm increments, that a low end spectrometer 20
some years ago for approx $10K would do ...

wouldn't you need 34 dots per pixel? In printing and publishing a
typical rosette pattern CMYK pixel requires 8 dots ...

It wouldn't be a good idea to split up each pixel into 34
subpixels, each only capturing a very narrow wavelength range.

Most incoming photons would not be used, i.e. the sensor would
have a low spectral efficiency.


what about analog capture through a prism then digital rendering in the
camera's software driver to the seven optical wavelength colors?

https://en.wikipedia.org/wiki/Prism#...tual_waves.gif


red
orange
yellow
green
blue
indigo
violet



That's still quantisation into discrete bands, rather than a truly linear .
geoff

On 2020-04-12 20:29, dale wrote:
On 4/8/2020 1:28 PM, Alfred Molon wrote:
In article ,
says...
back to resolution ...

the visible spectrum

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

is from 380nm-720nm wavelengths

if you sample that in 10nm increments, that a low end spectrometer 20
some years ago for approx $10K would do ...

wouldn't you need 34 dots per pixel? In printing and publishing a
typical rosette pattern CMYK pixel requires 8 dots ...

It wouldn't be a good idea to split up each pixel into 34
subpixels, each only capturing a very narrow wavelength range.

Most incoming photons would not be used, i.e. the sensor would
have a low spectral efficiency.


what about analog capture through a prism then digital rendering in the
camera's software driver to the seven optical wavelength colors?

https://en.wikipedia.org/wiki/Prism#...tual_waves.gif


red
s

Everything is trade space. If you sample wider spectrally then you'll
likely be under sampling spatially. Further contribution to noise as
well from each discrete sampling location.

IAC, whether today's cameras are RGB, RGBh or CYGM they seem to capture
the colour range more than adequately enough.