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Questions tagged [color-spaces]

A colour space is a specific organization of colours. In combination with physical device profiling, it allows for reproducible representations of colour, in both analogue and digital representations. The colour spaces most commonly encountered in photography are Adobe RGB and sRGB.

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Does the selection of sRGB or Adobe RGB in camera when shooting RAW ever matter?

I shoot RAW essentially 100% of the time, and have the in-camera color space setting at AdobeRGB (sRGB is also offered). The raw converter in turn is set to produce sRGB output files. As I understand ...
user's user avatar
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2 answers
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Why is Lightroom not rendering what I see in every other JPG viewer?

I'm new to Lightroom 5. To learn I tried to take an existing photo and improve it in the Develop module. I exported the results but the color cast is different in every other JPG viewer and browser ...
feetwet's user avatar
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33 votes
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What's the difference between Adobe RGB and sRGB and which should I set in my camera?

In my Canon 60D, there's a setting between Adobe RGB and sRGB. What's the difference and what should I prefer when shooting to RAW ?
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18 votes
5 answers
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What's the difference between colour space and bit depth?

I know that there are different types of colour space and that sRGB is the most common. Bit depth defines the variations of a colour channel, where (I think) 8 and/or 16 bits are the most common. ...
BBking's user avatar
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5 votes
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6500k calibrated monittor - what are the RGB values to represent a given monochromatic radiation of known wavelength?

Say I've calibrated a monitor to the standard 6500k 2.2 gamma, and the color space is sRGB. On this monitor, I would like to have a reasonably accurate representation of a monochromatic radiation (...
Florin Andrei's user avatar
3 votes
1 answer
771 views

What is the photopic luminous efficiency function?

What is the photopic luminous efficiency function? Is it actually a the, or are there multiple such functions? Is it an absolute fact of nature or simply an agreed-on standard? If the later, who says?...
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23 votes
7 answers
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Why isn't the xvYCC color space seeing uptake for still photography?

For the last fifteen years, sRGB has been the primary standard for computer monitors (and for consumer-level printing). That's changing now, as wider-gamut LED-backlit monitors become common. Usually, ...
mattdm's user avatar
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19 votes
3 answers
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How much of a difference do different color spaces make?

How much of a difference does it make to use one of the extended colorspaces vs. the normal sRGB? And what difference does it make? Are there situations where it is not important, and conversely are ...
PearsonArtPhoto's user avatar
17 votes
4 answers
5k views

Are RGB numeric values equal to CMYK percentages?

are RGB numeric values equal to CMYK percentages?
Jack's user avatar
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12 votes
5 answers
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Why are the color spaces we have access to incomplete?

The question, then: 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 ...
Wombat Pete's user avatar
5 votes
3 answers
2k views

What are the RGB primaries in a camera?

More generally, what is the nature of the gamut? Primaries as peak sensitivity don't behave the same as primaries for mixing output. I suppose this is necessary to know for RAW importing and would be ...
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How is color represented in RAW formats?

I was browsing the forum and found this thread: Does the selection of sRGB or Adobe RGB in camera when shooting RAW ever matter? It makes sense that the selection of either sRGB or Adobe RGB as the ...
Guilherme Rios's user avatar
2 votes
2 answers
3k views

What should I do with negative values when computing sRGB colors from spectra?

This question is from the computational side of things. Maybe some of you computational photography folks can help me out. If I have a normalized CIE XYZ tristimulus vector like this one: ...
kdbanman's user avatar
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2 answers
715 views

Why do pure colors (red/green/blue) become a mixture of colors when converting raw?

In trying to understand how raw is converted, I created a synthetic raw image that has a red, green and blue gradient strip, with a gamma of 2.2 (dng). I made the synthetic raw by converting an image ...
Atnas's user avatar
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26 votes
3 answers
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Should I use "sRGB mode" on my computer screen?

I recently acquired the ASUS PA248Q screen for photo processing (and everyday use and gaming: I have just that one display). This display offers a "sRGB" mode. Right now the screen is configured to ...
Matthieu Napoli's user avatar
20 votes
8 answers
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Why don't color spaces use up the entire color spectrum?

Take a look at the CIE 1931 chromaticity diagram shown with the sRGB color space gamut. Why are certain colors intentionally left out of color spaces, like you see below? Why not just include all the ...
Marcus McLean's user avatar
15 votes
4 answers
11k views

What is the difference or relation between a Color Model and a Color Space?

What is the exact relation or difference between a color model and a color space? I find these two terms to be used interchangeably in some literature. Are they simply the same? Thanks!
Tormod Haugene's user avatar
11 votes
2 answers
10k views

Which color space is used by my iPhone 8 photos?

While my old iPad mini photos say their color space is sRGB, my new iPhone 8 photos tell me their color space is "65535" ("unknown value"). Some sources say this value means "uncalibrated", but that ...
ideaboxer's user avatar
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4 votes
6 answers
12k views

Is there free software to compare gamuts?

This questions is related to Why did LR6 soft proofing thought some colors were out of gamut even if they turned out perfect? Since I found out some of my images are out of gamut of the printing ink+...
FarO's user avatar
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4 votes
6 answers
4k views

Should I use ProPhoto RGB?

I am fairly new to photography, and I have heard many people say that I should import my images in Photoshop using ProPhoto RGB as color space (only for the RAW images). However, when I import my ...
RandomGuy's user avatar
3 votes
1 answer
2k views

Why is there such a big difference with these JPG file sizes?

I have 2 nearly identical JPG images that have been processed externally, but one file is much larger (in file size) than the other. I have been looking at all the metadata and embedded information ...
Morgan T.'s user avatar
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3 votes
2 answers
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Should I perform the final color space conversion before or after final sharpening of an image?

When preparing an image for the web (or other media), the last two steps is usually to resize the image to the desired resolution and sharpen it at that resolution. However, when working in a larger/...
SoftMemes's user avatar
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3 votes
1 answer
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In Lightroom how do you specify Perceptual or Relative when exporting image?

In Lightroom 6 I can use Soft Proofing to see what my image will look like with different profiles, and I can choose whether to do the conversion using Perceptual or Relative. However when I actually ...
Paul Taylor's user avatar
2 votes
4 answers
2k views

Are there reasons to NOT use Adobe RGB in JPEG/TIFF files and CIELAB in TIFF files?

Back in the day of 256 color displays. We had web safe colors but today nobody uses 256 color systems. These days people are using either sRGB or Adobe RGB monitors and browsing the net with it. In ...
Delta Oscar Uniform's user avatar
2 votes
1 answer
1k views

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

What colour space does Lightroom use when you load an Adobe RGB or SRGB tiff/jpeg file into the Develop module? The reason I ask is because I was told that the develop module always uses the ProPhoto ...
TheIdiot's user avatar
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2 votes
3 answers
469 views

How do monitor and image editing software color profiles interact?

I've Googled, I've Bing-ed, I've even DuckDuckGo-ed, but I can't figure this out. Here it is: My monitor has its own color profile, currently "eyeball" calibrated but soon to be really calibrated. ...
KEF's user avatar
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1 vote
2 answers
2k views

Standard color space more vivid than Adobe RGB in Dell DELL UP2516D?

I noticed than the Standard preset of colors of my monitor produce more vivid colors than Adobe RGB preset. As far as I know, the monitor can reproduce both sRGB and Adobe RGB. Thought that the Adobe ...
lelukas's user avatar
  • 13
1 vote
1 answer
11k views

Color profile inside JPEG file

1) What is the best practice for color profiles embedded in .JPG images, for web? (non print) sRGB profile stored in .JPG file ? AdobeRGB profile stored in .JPG file ? no profile setting in .JPG file ...
Basj's user avatar
  • 356
0 votes
1 answer
2k views

Tagged or untagged sRGB images for web?

I have a situation and I am interested to find your point of view. We have a calibrated monitor at D6500, tone curve as measured ~2.4, white level ~90cd/m2 and a tagged sRGB / untagged sRGB image ...
user124853's user avatar