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. ...
Alan Marcus's user avatar
  • 38.9k
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 ...
Rafael's user avatar
  • 24.5k
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 ...
mattdm's user avatar
  • 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? ...
2012rcampion's user avatar
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 ...
Myndex's user avatar
  • 572
12 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 ...
Tazwar Utshas's user avatar
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). ...
Jerry Coffin's user avatar
  • 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....
Euri Pinhollow's user avatar
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 ...
MirekE's user avatar
  • 5,205
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 ...
Itai's user avatar
  • 103k
9 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. ...
Steven Kersting's user avatar
8 votes
Accepted

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

Yes, it exists and it is called pseudo-gray.
xenoid's user avatar
  • 21.1k
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, ...
ths's user avatar
  • 7,152
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 ...
Rafael's user avatar
  • 24.5k
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 ...
DeMorcan's user avatar
  • 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 ...
doug's user avatar
  • 1,207
7 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 ...
Zeus's user avatar
  • 1,549
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 ...
mattdm's user avatar
  • 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 ...
Euri Pinhollow's 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 ...
user1118321's user avatar
  • 2,893
6 votes
Accepted

Export photos from Lightroom to leverage HDR display on modern iPhones

Update, October 2023: As of Lightroom Classic 13/Lightroom CC 7 and iOS 17, this is now quite straightforward. Enable HDR editing for the photo in question in the Basic panel: Then simply export in ...
JtheNinja's user avatar
  • 176
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).
xenoid's user avatar
  • 21.1k
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 ...
Michael C's user avatar
  • 175k
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 ...
adrienlucca.net's user avatar
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 ...
user10216038's user avatar
  • 2,241
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 ...
LightBender's user avatar
  • 3,181
5 votes

6500k calibrated monittor - what are the RGB values to represent a given monochromatic radiation of known wavelength?

You're not really trying to produce a reasonable representation of a single wavelength because, as you have noted, an RGB color reproduction system is not capable of doing that. (Unless that ...
Michael C's user avatar
  • 175k
5 votes

Where can I see ProPhoto RGB photos

The ProPhoto colorspace cannot be displayed in its entirety. According to Wikipedia: One of the downsides to this color space is that approximately 13% of the representable colors are imaginary ...
xiota's user avatar
  • 27k
5 votes

Why is CMYK more efficient/beneficial than RGB for performing printing operation on white paper?

While RGB and CMY may be similar, adding K changes things. In theory, CMYK values of (0.3,0.3,0.3,0) and (0,0,0,0.3) should appear as identical grays, but in practice there may be differences which ...
supercat's user avatar
  • 451
4 votes

Why are the color spaces we have access to incomplete?

Color space has 2 words... Color and space. Color If all colors are combinations of red, green, and blue... Incorrect. That is a simplification that works on humans. Our eyes have receptors that use ...
Rafael's user avatar
  • 24.5k

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