26
votes
Accepted
Why is CMYK more efficient/beneficial than RGB for performing printing operation on white paper?
Both photographic film and photographic digital imaging chips are sensitive to the three light primary colors. In other words, both record components of the image i.e. red, green and blue.
...
- 38.5k
25
votes
Accepted
Why don't color spaces use up the entire color spectrum?
sRGB is a color-space developed by HP and Microsoft in 1996. CRT monitors were common and therefore sRGB was based on the characteristics of these monitors' capabilities. A good write-up of the ...
- 1,306
20
votes
Why is CMYK more efficient/beneficial than RGB for performing printing operation on white paper?
Let me debunk one thing: "RGB and CMY are two different color models."
They are not, they both form part of one RGB-CMY model. Or probably an RYGCBM model.
Ok. That is not entirely true but ...
- 23.1k
14
votes
Accepted
Which color space is used by my iPhone 8 photos?
For whatever reason, the ColorSpace tag is not very useful in EXIF. The only standard values are 1 (sRGB) and 65535 ("uncalibrated"). All other values are reserved. Some cameras use them to mean Adobe ...
- 143k
13
votes
Why are the color spaces we have access to incomplete?
First Question
If all colors are combinations of red, green and blue, and my monitor's pixels use all three, why is its color space limited to so small a portion of the actual complete color space? ...
- 543
13
votes
Accepted
Are there reasons to NOT use Adobe RGB in JPEG/TIFF files and CIELAB in TIFF files?
sRGB is the STANDARD
So stick with sRGB, it is the STANDARD for web content.
I fail to see any reasons to not use Adobe RGB when it comes to JPEG
files whatever you are posting them on web sites ...
- 572
11
votes
What is the difference between HSV and CIE-Lab color space?
A perceptual uniform color space ensures that the difference between two colors (as perceived by the human eye). It is proportional to the Euclidian distance within the given color space.
You may ...
- 211
11
votes
Why is CMYK more efficient/beneficial than RGB for performing printing operation on white paper?
There are two sort of separate issues here. One is RGB vs. CMY. The other is why you add the fourth color, instead of just using CMY (and sometimes, you use half a dozen colors or so, not just four).
...
- 19.3k
10
votes
Accepted
Why are the color spaces we have access to incomplete?
why is its color space limited to so small a portion of the actual complete color space?
Because the "red", "green" and "blue" which your monitor uses are pale, probably not noticeable but still pale....
- 4,547
10
votes
What is the actual color space of film in film photography?
I think it was the EktaSpace that was invented to hold all colors of films. Since silver halide color papers are still used as media for printing from digital, there are also color profiles of ...
- 5,215
10
votes
Accepted
How does the in-camera color space setting affect RAW files?
It has no impact on the RAW data. It may not even affect the embedded JPEG used as preview but I am not certain about that.
The point is that RAW images do not have color info at each pixel and so ...
- 102k
9
votes
Why don't color spaces use up the entire color spectrum?
The CIE 1931 chromaticity diagram represents all colors that the average human eye can see. But just because those colors can be perceived by the average human eye, does not mean that all technologies ...
- 32.1k
8
votes
Accepted
Pseudo high-bit grayscale - does this idea already exist?
Yes, it exists and it is called pseudo-gray.
- 20.2k
8
votes
Accepted
Why color-wheel websites (Adobe...) claim these colors are complementary
Not all color wheels are alike. The traditional/old school RGB color wheel (like Krita's) begins with the three primaries at 120˚ intervals; which places red opposite cyan, such as this wheel.
...
- 13.7k
7
votes
What is the actual color space of film in film photography?
I foud this graphic on photo.net, in a thread discussing the same topic:
I can't vouch for its veracity, but it looks reasonable.
Both of the depicted films are a bit wider than AdobeRGB in the reds, ...
- 7,003
7
votes
Accepted
How are images saved in different color spaces?
RGB is not a color space, it is a color mode or color model. The same for HSB, HSL CMYK, Lab, Grayscale.
But if an image is in HSL color space, is computer will save Hue, Saturation, Intensity
Yeap
...
- 23.1k
7
votes
Accepted
Does saving a file in Prophoto RGB increase filesize?
ProphotoRGB is the color space which defines the gamut. This RAW file size is controlled by the color depth (such as 14 bit). A 14 bit depth is the same size in AdobeRGB and ProphotoRGB. A jpg is 8 ...
- 216
7
votes
Is it possible to buy chromaticity-plot color standards? If so, how, and where?
It simply isn't possible for any print, which only absorbs light, to produce a colorimetrically accurate and useful reproduction of the CIEXY human gamut "horseshoe."
The curved boundary represents ...
- 1,207
6
votes
Why do my Photoshop/LR pictures look different on Facebook?
What I'm wondering is, why do my pictures not look the same across the
board?! I'm sure I will have an experience that one time I upload a
picture to Facebook or somewhere online and the picture ...
- 5,215
6
votes
Accepted
Are colour profiles ever stored in RAW files?
Part of this question basically seems to be asking if the answers to the other question are actually right. For that part, don't worry — they are. (And no information is lost in this way — the leader ...
- 143k
6
votes
Why don't we see charts of the colorspace/gamut of a DSLR?
The chromatic gamut is the property of output device, not a recording device.
The colorimetric input device is characterised with it's compliance to Maxwell-Ives criterion - i.e. how metamerically ...
- 4,547
6
votes
Why does editing software not care about colorspace?
Most editing software cares very much about colorspace. The issue is that users don't usually understand it (because it's very complicated), and even when they do, they often expect contradictory ...
- 2,893
6
votes
Should I use ProPhoto RGB?
Let me first say that everything that's happening is exactly how it should be. Even the fact that Photoshop gives you a warning, which is a matter of its Color Settings (see below). And your concerns ...
- 1,529
6
votes
How to separate the RGB colour space to only N colours?
The general term is color quantization.
When this is done on purpose for artistic effect, this is called posterization (hence the name of the filters in Gimp and Photoshop).
- 20.2k
5
votes
Why don't color spaces use up the entire color spectrum?
Any color space based on RGB primaries will describe a triangle. Since the CIE diagram is not perfectly triangular, it is impossible to include all of them in a triangle without creating imaginary ...
- 1,465
5
votes
Accepted
How to minimise the noise in colour values when moving between colour spaces?
As someone who regularly works in other spaces (most frequently Lab) I'd say not to worry about it.
Since your rationale for going to another space is to make changes you're expecting that your RGB ...
- 9,539
5
votes
Why are the color spaces we have access to incomplete?
Your basic assumption: "If all colors are combinations of red, green and blue" is just wrong. Rafael says it works on humans, but this is also wrong. Let me answer this: "What colors are we NOT seeing ...
- 151
5
votes
What is the actual color space of film in film photography?
Today those of us not in the color reproduction industry as a profession tend to talk and hear a lot more about certain color spaces that a particular imaging device can or cannot support than our ...
- 174k
5
votes
Why does GIMP ask me to switch between sRGB color profiles?
The reason GIMP asks to switch is right there in the Copyright line.
sRGB is a standard, that’s what the “s” means. In principle there is no difference between these color profiles, they are both ...
- 2,221
5
votes
Pseudo high-bit grayscale - does this idea already exist?
You have already pointed out the exact reason this wouldn't be worth the effort of implementing.
The slight tint shouldn't be noticeable.
The minute differences in brightness wouldn't be ...
- 3,181
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