Skip to main content
24 votes

Level adjusting images to hide internal features/detailing

A well know technique is called "luminosity masks". You create a selection mask where the pixels selection level is: 100% or near 100% in the luminosity range that you want to change, 0% or very low ...
xenoid's user avatar
  • 21.4k
23 votes

Trying to have prints match closely to a monitor?

Other users gave great answers about tuning your computer. However since you mentioned costco, this is a costco specific answer: I've sent many prints to costco and had great luck. However not so ...
Michael Jasper's user avatar
12 votes

How can I check how much of sRGB and AdobeRGB my monitor covers in percentage?

The tool displaycal-profile-info, part of the DisplayCAL package, can do this. This works (and works basically the same way) for Windows, Mac, and Linux. See for ...
mattdm's user avatar
  • 143k
10 votes

What is the purpose of gamma correction in today's screens and how does it relate to graphics and photography?

I am a former broadcast engineer, and I currently work in feature films and television as an editor and VFX supervisor. Many statements on here are incorrect. Gamma in the signal path is a desired ...
Myndex's user avatar
  • 572
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

Level adjusting images to hide internal features/detailing

I'll interpret your question in the opposite way everyone else has. You seem to me to be asking how to prevent the details becoming visible again. Once you have darkened your image, increase the black ...
David's user avatar
  • 216
9 votes
Accepted

switched to RAW and seeing ugly light bands in Lightroom

The first thing you must realize is that what you are seeing on your monitor is not "the" raw file. What you are seeing is an 8-bit demosaiced preview conversion of the raw file created by ...
Michael C's user avatar
  • 175k
9 votes

Why does the camera output an image with multi-colors not shown by the naked eye under the projector?

It's the difference between how your camera and your eye/brain see the scene. Many projectors scan each color channel in sequence very rapidly. It's too fast for our eyes to pick it up, as our brains ...
Michael C's user avatar
  • 175k
9 votes

Pictures uploaded to Facebook display wrong colors, but only in Firefox

According to ICC color correction in Firefox, Firefox has been capable of reading colour profiles in images since Firefox version 3 (released 17 June, 2008). This was configurable, and initially ...
osullic's user avatar
  • 12.4k
8 votes
Accepted

A print shop gives me instructions to convert to sRGB instead an ICC profile, is no soft proofing necessary?

TLDR: Choose a print shop that provides ICC profiles. Soft proofing is an important step for optimal results. If a shop doesn't share its profiles there are two reasons that come to my mind: lack ...
Grebu's user avatar
  • 1,316
8 votes

Xrite Colorchecker color specifications and 18% reflectance gray card

After further research, here is a partial answer taking as source Blog-Couleur: Quelles sont les valeurs RVB de la colorchecker ? and BabelColor PDF and the Xrite website. The last row seems to be ...
Basj's user avatar
  • 356
8 votes

What lens do I need?

Lenses do not affect colour balance to any significant degree - they are designed to be as neutral as possible. If the colours are too warm, reduce the colour temperature in your camera (or in post-...
Philip Kendall's user avatar
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
  • 7,171
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
  • 1,217
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
7 votes

How to edit more than 8 bits (10, 16 bits) of color in GIMP?

You can use the 0..100 scale: This is a percentage with one decimal digit, so in high precision modes, it is mapped to 1000 different values, and therefore about 10 bits. To edit in 16-bit set the ...
xenoid's user avatar
  • 21.4k
6 votes

18% gray paint manufacturers

The standard gray card is 18% gray. Take a sample gray card with you to the paint store and have them custom mix. The reflection readings are: 0.75 red 0.75 green 0.75 blue 0.75 via the yellow visual ...
Alan Marcus's user avatar
  • 39.2k
6 votes
Accepted

How many distinct colors are in dci-p3 color gamut

A Color Gamut refers to colors within a Color Space which is a representation of which colors exist within it and which ones are not. It does not usually define a representation which is why there is ...
Itai's user avatar
  • 103k
6 votes

How is this sort-of duotone achieved?

I can't imagine how one would achieve these colours? There are two light sources, each with its own color. There's the very flat, cool, white light from the overcast, early morning or late afternoon ...
Caleb's user avatar
  • 31.7k
6 votes
Accepted

What is the difference between color calibration and white balance?

Color calibration usually refers to adjusting a device, such as a monitor or printer, so that digital colors appear in a standard way. An image should look as close as possible to the same across ...
mattdm's user avatar
  • 143k
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
Accepted

How to set up correct color profile in Windows?

The question is very broad and probably beyond the scope of an answer here. Entire books have been written regarding points 1-5 of your question. It seems that all of that is really just a long ...
Michael C's user avatar
  • 175k
5 votes
Accepted

Why are saturation and color very different when I open my JPEG photos in different programs?

This image has an input device color profile attached, OlympusStylus1-Generic. The highly-saturated and vivid images are from applications which are correctly ...
mattdm's user avatar
  • 143k
5 votes
Accepted

How to embed two ICC profiles in an image?

Usually, there's no reason to embed more than more one profile. With an input image, you embed the input profile, so that your colour management system can work out what colours the numbers in the ...
JerryTheC's user avatar
  • 3,023
5 votes

Can I refill a printer's gray tank with a completely different color to increase color gamut?

The Epson 3880 uses a set of 9 cartridges. It's still a CMYK sort of system, but more like CCMMYKKKK. With four different varieties of black, it's understandable that you might be thinking that ...
Caleb's user avatar
  • 31.7k
5 votes

Trying to have prints match closely to a monitor?

Some high-end, made for visual-arts work monitors ship with pretty decent color profiling from the factory. But if you're looking for a cheaper option, you definitely need a color calibrator. There's ...
mattdm's user avatar
  • 143k
5 votes

Why does the camera output an image with multi-colors not shown by the naked eye under the projector?

If multiple projectors were used, the white balance may not have been consistent among all of them. They may have initially been set to match, but the color temperature can change as the lamps age. We ...
xiota's user avatar
  • 27k
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
  • 2,239
5 votes

Level adjusting images to hide internal features/detailing

If there were an easy solution to this, Camera manufacturers would have built it in-camera (and cashed out) long ago :) Here's the problem. The best modern cameras are sensitive to at most ~15 stops ...
Jesse Stuart's user avatar
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

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