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. ...
user avatar
  • 36.3k
23 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 ...
user avatar
  • 1,256
22 votes
Accepted

What's the difference between colour space and bit depth?

Basically, life color information is like a box of chocolates crayons... Color information is stored in integers, not analog values — there are a discrete, countable number of colors that can be ...
user avatar
  • 140k
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 ...
user avatar
  • 20.8k
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 ...
user avatar
  • 140k
13 votes

What's the difference between colour space and bit depth?

Bit depth and color space are not the same thing, and neither are they mutually exclusive. They are different things that exist simultaneously. For a particularly simple explanation: Bit depth ...
user avatar
  • 69.2k
12 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? ...
user avatar
12 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 ...
user avatar
  • 512
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). ...
user avatar
  • 18.7k
9 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....
user avatar
9 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 ...
user avatar
  • 5,115
9 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 ...
user avatar
  • 101k
8 votes

Is it possible to convert to and from LAB color space without loss of quality?

Because, as you say, L*a*b* is a superset larger than either sRGB or Adobe RGB, you're right, this is safe — if you have enough bit depth to prevent color mapping errors. In practice, this means that ...
user avatar
  • 140k
8 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 ...
user avatar
8 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 ...
user avatar
  • 31k
8 votes
Accepted

Pseudo high-bit grayscale - does this idea already exist?

Yes, it exists and it is called pseudo-gray.
user avatar
  • 16.7k
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. ...
user avatar
7 votes

What are the RGB primaries in a camera?

Digital cameras and films to do not have "primaries". The spectral sensitives of digital cameras and films dictate their response to various wavelengths of light. These native responses are ...
user avatar
  • 530
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 ...
user avatar
  • 20.8k
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 ...
user avatar
  • 206
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 ...
user avatar
  • 1,197
6 votes

What is the advantage of using L*a*b in Photoshop?

Lab is one of those colour spaces that people are either 'in the know' and use when it's appropriate or they just see as a bit of a scary place to be avoided. It's not a one-size fits all space and ...
user avatar
  • 9,440
6 votes
Accepted

Why does L*=0 not correspond to black in the L*a*b* color space?

Whatever is the "RGB" color space (sRGB?) that you entered as destination in Mathematica, it has limited range of colors that are described by the R, G and B values, usually similar to what a monitor ...
user avatar
  • 5,115
6 votes
Accepted

How is data in a camera's colorspace transformed into XYZ or a standard RGB space?

The camera sensor does not have a color space that allows going back and forth to XYZ since it does not have the same sensitivity curves as the human eye (Luther - Ives condition). The best that can ...
user avatar
  • 241
6 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, ...
user avatar
  • 6,790
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 ...
user avatar
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 ...
user avatar
  • 2,833
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 ...
user avatar
  • 1,324
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).
user avatar
  • 16.7k
5 votes
Accepted

What colour space does Adobe Lightroom use in the Develop Module?

1) I have never seen any official information, but various people close to the LR development team indicated at numerous occasions that LR is internally using color space that they named Melissa, ...
user avatar
  • 5,115

Only top scored, non community-wiki answers of a minimum length are eligible