It is correct to match light sources with the same color temperature?
For example, the color temperature of a candle flame, sunrise and sunset have the same color temperature, knowing that its color temperature is the same, could you say that these sources are similar or equivalent? Could you say that they would produce the same picture of a scene? Could you say that the values of the pixels are the same with these three sources of light? Thanks in advance
color white-balance light image-processing
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add a comment |
For example, the color temperature of a candle flame, sunrise and sunset have the same color temperature, knowing that its color temperature is the same, could you say that these sources are similar or equivalent? Could you say that they would produce the same picture of a scene? Could you say that the values of the pixels are the same with these three sources of light? Thanks in advance
color white-balance light image-processing
New contributor
1
I mean, if you disregard the billion x difference in lumens...then yea, I suppose you could say they’re similar :-D jokes aside - this question seems unclear to me. What problem are you trying to solve?
– Hueco
2 hours ago
s it possible to quantify the sun in lumens? I think the only thing I've seen is that you can quantify in luxes. This question is no joke, excuse my ignorance, I am a little new in this. The problem I am trying to solve is to relate artificial light sources and natural light sources and see if there is any similarity between them, the only similarity I could find was through the color temperature.
– SRG
2 hours ago
An example of relating to sources of natural and artificial light that I could think was sunrise and sunset and some household lamps. The sunlight at sunrise and sunset have a temperature of 2400 ° K while some light bulbs have a temperature of 2800 ° K, these are values that are a little close, I thought about relating. Is this correct?
– SRG
2 hours ago
add a comment |
For example, the color temperature of a candle flame, sunrise and sunset have the same color temperature, knowing that its color temperature is the same, could you say that these sources are similar or equivalent? Could you say that they would produce the same picture of a scene? Could you say that the values of the pixels are the same with these three sources of light? Thanks in advance
color white-balance light image-processing
New contributor
For example, the color temperature of a candle flame, sunrise and sunset have the same color temperature, knowing that its color temperature is the same, could you say that these sources are similar or equivalent? Could you say that they would produce the same picture of a scene? Could you say that the values of the pixels are the same with these three sources of light? Thanks in advance
color white-balance light image-processing
color white-balance light image-processing
New contributor
New contributor
edited 54 mins ago
mattdm
122k40357653
122k40357653
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asked 3 hours ago
SRGSRG
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112
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1
I mean, if you disregard the billion x difference in lumens...then yea, I suppose you could say they’re similar :-D jokes aside - this question seems unclear to me. What problem are you trying to solve?
– Hueco
2 hours ago
s it possible to quantify the sun in lumens? I think the only thing I've seen is that you can quantify in luxes. This question is no joke, excuse my ignorance, I am a little new in this. The problem I am trying to solve is to relate artificial light sources and natural light sources and see if there is any similarity between them, the only similarity I could find was through the color temperature.
– SRG
2 hours ago
An example of relating to sources of natural and artificial light that I could think was sunrise and sunset and some household lamps. The sunlight at sunrise and sunset have a temperature of 2400 ° K while some light bulbs have a temperature of 2800 ° K, these are values that are a little close, I thought about relating. Is this correct?
– SRG
2 hours ago
add a comment |
1
I mean, if you disregard the billion x difference in lumens...then yea, I suppose you could say they’re similar :-D jokes aside - this question seems unclear to me. What problem are you trying to solve?
– Hueco
2 hours ago
s it possible to quantify the sun in lumens? I think the only thing I've seen is that you can quantify in luxes. This question is no joke, excuse my ignorance, I am a little new in this. The problem I am trying to solve is to relate artificial light sources and natural light sources and see if there is any similarity between them, the only similarity I could find was through the color temperature.
– SRG
2 hours ago
An example of relating to sources of natural and artificial light that I could think was sunrise and sunset and some household lamps. The sunlight at sunrise and sunset have a temperature of 2400 ° K while some light bulbs have a temperature of 2800 ° K, these are values that are a little close, I thought about relating. Is this correct?
– SRG
2 hours ago
1
1
I mean, if you disregard the billion x difference in lumens...then yea, I suppose you could say they’re similar :-D jokes aside - this question seems unclear to me. What problem are you trying to solve?
– Hueco
2 hours ago
I mean, if you disregard the billion x difference in lumens...then yea, I suppose you could say they’re similar :-D jokes aside - this question seems unclear to me. What problem are you trying to solve?
– Hueco
2 hours ago
s it possible to quantify the sun in lumens? I think the only thing I've seen is that you can quantify in luxes. This question is no joke, excuse my ignorance, I am a little new in this. The problem I am trying to solve is to relate artificial light sources and natural light sources and see if there is any similarity between them, the only similarity I could find was through the color temperature.
– SRG
2 hours ago
s it possible to quantify the sun in lumens? I think the only thing I've seen is that you can quantify in luxes. This question is no joke, excuse my ignorance, I am a little new in this. The problem I am trying to solve is to relate artificial light sources and natural light sources and see if there is any similarity between them, the only similarity I could find was through the color temperature.
– SRG
2 hours ago
An example of relating to sources of natural and artificial light that I could think was sunrise and sunset and some household lamps. The sunlight at sunrise and sunset have a temperature of 2400 ° K while some light bulbs have a temperature of 2800 ° K, these are values that are a little close, I thought about relating. Is this correct?
– SRG
2 hours ago
An example of relating to sources of natural and artificial light that I could think was sunrise and sunset and some household lamps. The sunlight at sunrise and sunset have a temperature of 2400 ° K while some light bulbs have a temperature of 2800 ° K, these are values that are a little close, I thought about relating. Is this correct?
– SRG
2 hours ago
add a comment |
2 Answers
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It's roughly true that light sources with the same color temperature have the same appearance. However, there are three big caveats.
First, there's also a magenta-green axis
Human perception of color is complicated. White balance as measured in Kelvin is simplification of one aspect of that perception, basically relating to orange/blue balance. This is reasonably helpful for light sources that approximate blackbody radiation, but doesn't fit for a lot of artificial light sources, which may tilt more towards green or magenta — tints which are off the Kelvin WB scale.
Second, not every light source covers a complete spectrum
Sunlight filtered through the atmosphere, or the candlelight you mention, or an incandescent bulb — all of these have a clear weight on that Kelvin scale, but they also put out light across the visible spectrum (and into the invisible infrared and ultraviolet). This is not the case with gas-discharge or fluorescent light sources. That includes sodium-vapor streetlights, fluorescent bulbs, and LED lighting.
Third, the numbers are nominal.
No candle flame snaps to exactly 1800K, and the color of sunrise and sunset is so complex that it's probably safe to say that literally every one is different.
Sooooo.....
You ask:
Could you say that the values of the pixels are the same with these three sources of light?
And in practice, no, this is completely unlikely.
They may, however, be similar enough that they work together in a single photograph without causing the disruptive look we get when one area of the photograph is cool blue and another quite orange due to mixed lighting.
In your example of a bulb rated 2800K and a sunrise or sunset coming through a window (nominally 2400K), the window light may look a little warm (that is, warm in the artistic rather than physical sense: more orange) in your photograph balanced for the 2800K bulb — but then, that may be exactly what you want.
add a comment |
It wouldn't be accurate to say the sources are the same but it would be accurate to say the they are similar. Atmospheric differences (moisture, dust, etc.) can change the color temperature of the sun not just from day to day, but even from minute to minute.
Since lighting conditions are often dim, if you want to photograph a subject in these conditions, a flash might be used. You can use a CTO gel on the flash (CTO = Color Temperature Orange) to bring the color of the flash closer to the color of the candlelight or sunlight so that any color-adjustments performed in post processing wont have radically different color temperatures. But even the CTO gels come in 1/4, 1/2, 3/4 and full CTO strength (depending on whether you need a pale yellow/gold vs. an intense orange).
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2 Answers
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2 Answers
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It's roughly true that light sources with the same color temperature have the same appearance. However, there are three big caveats.
First, there's also a magenta-green axis
Human perception of color is complicated. White balance as measured in Kelvin is simplification of one aspect of that perception, basically relating to orange/blue balance. This is reasonably helpful for light sources that approximate blackbody radiation, but doesn't fit for a lot of artificial light sources, which may tilt more towards green or magenta — tints which are off the Kelvin WB scale.
Second, not every light source covers a complete spectrum
Sunlight filtered through the atmosphere, or the candlelight you mention, or an incandescent bulb — all of these have a clear weight on that Kelvin scale, but they also put out light across the visible spectrum (and into the invisible infrared and ultraviolet). This is not the case with gas-discharge or fluorescent light sources. That includes sodium-vapor streetlights, fluorescent bulbs, and LED lighting.
Third, the numbers are nominal.
No candle flame snaps to exactly 1800K, and the color of sunrise and sunset is so complex that it's probably safe to say that literally every one is different.
Sooooo.....
You ask:
Could you say that the values of the pixels are the same with these three sources of light?
And in practice, no, this is completely unlikely.
They may, however, be similar enough that they work together in a single photograph without causing the disruptive look we get when one area of the photograph is cool blue and another quite orange due to mixed lighting.
In your example of a bulb rated 2800K and a sunrise or sunset coming through a window (nominally 2400K), the window light may look a little warm (that is, warm in the artistic rather than physical sense: more orange) in your photograph balanced for the 2800K bulb — but then, that may be exactly what you want.
add a comment |
It's roughly true that light sources with the same color temperature have the same appearance. However, there are three big caveats.
First, there's also a magenta-green axis
Human perception of color is complicated. White balance as measured in Kelvin is simplification of one aspect of that perception, basically relating to orange/blue balance. This is reasonably helpful for light sources that approximate blackbody radiation, but doesn't fit for a lot of artificial light sources, which may tilt more towards green or magenta — tints which are off the Kelvin WB scale.
Second, not every light source covers a complete spectrum
Sunlight filtered through the atmosphere, or the candlelight you mention, or an incandescent bulb — all of these have a clear weight on that Kelvin scale, but they also put out light across the visible spectrum (and into the invisible infrared and ultraviolet). This is not the case with gas-discharge or fluorescent light sources. That includes sodium-vapor streetlights, fluorescent bulbs, and LED lighting.
Third, the numbers are nominal.
No candle flame snaps to exactly 1800K, and the color of sunrise and sunset is so complex that it's probably safe to say that literally every one is different.
Sooooo.....
You ask:
Could you say that the values of the pixels are the same with these three sources of light?
And in practice, no, this is completely unlikely.
They may, however, be similar enough that they work together in a single photograph without causing the disruptive look we get when one area of the photograph is cool blue and another quite orange due to mixed lighting.
In your example of a bulb rated 2800K and a sunrise or sunset coming through a window (nominally 2400K), the window light may look a little warm (that is, warm in the artistic rather than physical sense: more orange) in your photograph balanced for the 2800K bulb — but then, that may be exactly what you want.
add a comment |
It's roughly true that light sources with the same color temperature have the same appearance. However, there are three big caveats.
First, there's also a magenta-green axis
Human perception of color is complicated. White balance as measured in Kelvin is simplification of one aspect of that perception, basically relating to orange/blue balance. This is reasonably helpful for light sources that approximate blackbody radiation, but doesn't fit for a lot of artificial light sources, which may tilt more towards green or magenta — tints which are off the Kelvin WB scale.
Second, not every light source covers a complete spectrum
Sunlight filtered through the atmosphere, or the candlelight you mention, or an incandescent bulb — all of these have a clear weight on that Kelvin scale, but they also put out light across the visible spectrum (and into the invisible infrared and ultraviolet). This is not the case with gas-discharge or fluorescent light sources. That includes sodium-vapor streetlights, fluorescent bulbs, and LED lighting.
Third, the numbers are nominal.
No candle flame snaps to exactly 1800K, and the color of sunrise and sunset is so complex that it's probably safe to say that literally every one is different.
Sooooo.....
You ask:
Could you say that the values of the pixels are the same with these three sources of light?
And in practice, no, this is completely unlikely.
They may, however, be similar enough that they work together in a single photograph without causing the disruptive look we get when one area of the photograph is cool blue and another quite orange due to mixed lighting.
In your example of a bulb rated 2800K and a sunrise or sunset coming through a window (nominally 2400K), the window light may look a little warm (that is, warm in the artistic rather than physical sense: more orange) in your photograph balanced for the 2800K bulb — but then, that may be exactly what you want.
It's roughly true that light sources with the same color temperature have the same appearance. However, there are three big caveats.
First, there's also a magenta-green axis
Human perception of color is complicated. White balance as measured in Kelvin is simplification of one aspect of that perception, basically relating to orange/blue balance. This is reasonably helpful for light sources that approximate blackbody radiation, but doesn't fit for a lot of artificial light sources, which may tilt more towards green or magenta — tints which are off the Kelvin WB scale.
Second, not every light source covers a complete spectrum
Sunlight filtered through the atmosphere, or the candlelight you mention, or an incandescent bulb — all of these have a clear weight on that Kelvin scale, but they also put out light across the visible spectrum (and into the invisible infrared and ultraviolet). This is not the case with gas-discharge or fluorescent light sources. That includes sodium-vapor streetlights, fluorescent bulbs, and LED lighting.
Third, the numbers are nominal.
No candle flame snaps to exactly 1800K, and the color of sunrise and sunset is so complex that it's probably safe to say that literally every one is different.
Sooooo.....
You ask:
Could you say that the values of the pixels are the same with these three sources of light?
And in practice, no, this is completely unlikely.
They may, however, be similar enough that they work together in a single photograph without causing the disruptive look we get when one area of the photograph is cool blue and another quite orange due to mixed lighting.
In your example of a bulb rated 2800K and a sunrise or sunset coming through a window (nominally 2400K), the window light may look a little warm (that is, warm in the artistic rather than physical sense: more orange) in your photograph balanced for the 2800K bulb — but then, that may be exactly what you want.
answered 1 hour ago
mattdmmattdm
122k40357653
122k40357653
add a comment |
add a comment |
It wouldn't be accurate to say the sources are the same but it would be accurate to say the they are similar. Atmospheric differences (moisture, dust, etc.) can change the color temperature of the sun not just from day to day, but even from minute to minute.
Since lighting conditions are often dim, if you want to photograph a subject in these conditions, a flash might be used. You can use a CTO gel on the flash (CTO = Color Temperature Orange) to bring the color of the flash closer to the color of the candlelight or sunlight so that any color-adjustments performed in post processing wont have radically different color temperatures. But even the CTO gels come in 1/4, 1/2, 3/4 and full CTO strength (depending on whether you need a pale yellow/gold vs. an intense orange).
add a comment |
It wouldn't be accurate to say the sources are the same but it would be accurate to say the they are similar. Atmospheric differences (moisture, dust, etc.) can change the color temperature of the sun not just from day to day, but even from minute to minute.
Since lighting conditions are often dim, if you want to photograph a subject in these conditions, a flash might be used. You can use a CTO gel on the flash (CTO = Color Temperature Orange) to bring the color of the flash closer to the color of the candlelight or sunlight so that any color-adjustments performed in post processing wont have radically different color temperatures. But even the CTO gels come in 1/4, 1/2, 3/4 and full CTO strength (depending on whether you need a pale yellow/gold vs. an intense orange).
add a comment |
It wouldn't be accurate to say the sources are the same but it would be accurate to say the they are similar. Atmospheric differences (moisture, dust, etc.) can change the color temperature of the sun not just from day to day, but even from minute to minute.
Since lighting conditions are often dim, if you want to photograph a subject in these conditions, a flash might be used. You can use a CTO gel on the flash (CTO = Color Temperature Orange) to bring the color of the flash closer to the color of the candlelight or sunlight so that any color-adjustments performed in post processing wont have radically different color temperatures. But even the CTO gels come in 1/4, 1/2, 3/4 and full CTO strength (depending on whether you need a pale yellow/gold vs. an intense orange).
It wouldn't be accurate to say the sources are the same but it would be accurate to say the they are similar. Atmospheric differences (moisture, dust, etc.) can change the color temperature of the sun not just from day to day, but even from minute to minute.
Since lighting conditions are often dim, if you want to photograph a subject in these conditions, a flash might be used. You can use a CTO gel on the flash (CTO = Color Temperature Orange) to bring the color of the flash closer to the color of the candlelight or sunlight so that any color-adjustments performed in post processing wont have radically different color temperatures. But even the CTO gels come in 1/4, 1/2, 3/4 and full CTO strength (depending on whether you need a pale yellow/gold vs. an intense orange).
answered 1 hour ago
Tim CampbellTim Campbell
5266
5266
add a comment |
add a comment |
SRG is a new contributor. Be nice, and check out our Code of Conduct.
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1
I mean, if you disregard the billion x difference in lumens...then yea, I suppose you could say they’re similar :-D jokes aside - this question seems unclear to me. What problem are you trying to solve?
– Hueco
2 hours ago
s it possible to quantify the sun in lumens? I think the only thing I've seen is that you can quantify in luxes. This question is no joke, excuse my ignorance, I am a little new in this. The problem I am trying to solve is to relate artificial light sources and natural light sources and see if there is any similarity between them, the only similarity I could find was through the color temperature.
– SRG
2 hours ago
An example of relating to sources of natural and artificial light that I could think was sunrise and sunset and some household lamps. The sunlight at sunrise and sunset have a temperature of 2400 ° K while some light bulbs have a temperature of 2800 ° K, these are values that are a little close, I thought about relating. Is this correct?
– SRG
2 hours ago