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16

Normally you would use sRGB mode. It is the most common denominator. Keep in mind that this mode is not calibrated, so your sRGB colors will be different from other sRGB colors. They should be closer. Once in sRGB mode your monitor may not be able to show colors which are outside of sRGB color-space which is why sRGB is not the default mode. The truly odd ...


12

It's just the values from the sensor, which is a (mostly) linear counter. The different photosites on a Bayer sensor have different colored filters, and the value for each site represents the light which gets through that filter. The name "RAW" is meant to convey precisely that the values are simply that "uncooked" reading. In a sense, then, the RAW file is ...


11

xvYCC is a particular clever way of encoding color data: it abuses the YCC representation by using previously-forbidden combinations of values to represent colors outside the gamut of the RGB space used in the YCC scheme. That is, some YCC tuples decode to colors with negative R G or B values. Previously these were simply illegal; in xvYCC these are ...


11

It is normally the responsibility of the viewing software to convert from the color-space of the file to that of the display. From what I understand, you want to do the conversion yourself because you use programs that simply assume sRGB as a color-space. A lossless conversion is not possible for this. On a properly calibrated system you will also make ...


11

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 example for my (calibrated) ThinkPad screen: ... which has a 60% coverage of sRGB and 43% coverage of Adobe RGB.


10

from Charles Poynton "The rehabilitation of gamma": Misconception: The nonlinearity of a CRT monitor is a defect that needs to be corrected. Fact: The nonlinearity of a CRT is very nearly the inverse of the lightness sensitivity of human vision. The nonlinearity causes a CRT’s response to be roughly perceptually uniform. Far from being a defect, ...


9

If everything is working correctly, the difference should be subtle and you shouldn't generally notice a big shift. I have a suspicion: You may be working on a monitor which is not capable of rendering the whole Adobe RGB gamut. In this case, out-of-gamut colors are clipped or approximated (perhaps poorly). When you convert to sRGB, the colors are mapped ...


8

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 benefit, and a design choice by early video engineers to reduce perceived noise in transmission. All vacuum tubes, CRTs included, exhibit various non-linearities ...


7

Consider this example from Cambridge in Colour: By applying gamma encoding, we are able to represent the original image more accurately, with the same bit depth (5, in this example). This is achieved by using the 32 levels in a way that more closely corresponds to the human eye. In other words, it's a form of compression. JPEGs, for example, can actually ...


7

This is a very incomplete answer, but important in regards to terminology and understanding everything: RGB and CMYK are color models. They don't define what your monitor or printer can do, only how color is created. A great question to review: What is the difference or relation between a Color Model and a Color Space? He also told me CMYK is a 100% ...


5

CMYK CMYK is a subtractive colour model rather than an additive as in the case of sRGB. The subtractive colour models are used in printing since they allow dyes, ink or paint pigments to absorb certain wavelengths from an otherwise white surface. The dyes, ink and paint pigments can be a very limited discrete set that are mixed to get a wide range of ...


5

Actually, #E58C4E, if you mean the web color, is defined to be in sRGB. However, if you didn't mean that particular convention but rather "red:229, green:140, blue:78", it's a different matter, because the extremes (the "primaries") of each channel are different in different color spaces, so those numbers actually do represent something different in each ...


5

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 be done is come up with a transform matrix that minimizes the sum of the errors in LAB for the set of standard colors (Gretab -Macbeth). I believe this process ...


5

In my opinion the designer is wrong. CMYK is NOT a subset of sRGB. It is a diferent color model. Let me explain. sRGB is a color profile for rgb colors. But actually it is close to a "color space" (yes, this afirmation will be controversial). On top of that you "profile" your monitor and computer conected together. But there are tons of diferent ...


5

That Adobe seems to butcher the colors of all my raws drives me nuts You are wrong here. What you see on the back of your camera is not the raw file, but the JPEG preview, which includes whatever setting you dial in your camera. That includes contrast and boost of saturation. LR cannot reproduce the same look from the raw file, because the process is ...


5

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 are absolutely valid. In a TL;DR fashion, I'll say this: only use a non-sRGB profile if: You have a colour-calibrated monitor (and, in fact, the whole ...


4

There is no global color space. A color as you specify is just a triplet of Red, Green and Blue. Each component has a value between 0 and 255 (0 and FF in hex) which indicates how much power to give each LED for a given pixel (or phosphor in the days of CRTs). The scale is relative to your monitor and its current settings. This is why monitors need to be ...


4

[afaik] Unless the display driver or application being used applies a color profile or similar to compensate for the wider gamut, the color codes you use in your application will be sent to the display as-is. And in the display a specific color value (say E5) is no longer interpreted in the srgb scale but in the wider gamut scale. So why does the display ...


4

The real key is going to be that you'll want true 8 bit color resolution rather than the 6 bits that most TN panels get. Off angle color changes is also a key issue when looking at choosing a good screen for any color sensitive work. Having a wider color gamut is helpful, but if I had to choose between a more limited color gamut on a S-IPS panel with good ...


4

The covered range of colors (called gamut) is different between color spaces because these ranges are then discretized, "digitized", represented on a fixed amount of bits, and then reproduced on a monitor, in print, etc. One wants to store as much color information as possible in a certain amount of bytes. Now, if you have an equipment which can only emit ...


4

Is it possible to calibrate correctly and identically (or nearly) 2 monitors? Only if they're identical display types. There are many different types of LCD display, and several non-LCD display types besides. Two different display types may simply be incapable of producing the same color gamut, brightness levels, evenness of illumination, contrast, etc. ...


4

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 of your course is wrong. *) The other parts of the question basically ask if (and why) this information is stored at all, if it doesn't affect the raw data. ...


4

In Adobe Photoshop, there are two menu options: "Assign Profile" and "Convert to Profile". If you have an image in the ProPhoto RGB color space, and you "assign profile" sRGB, this just changes the metadata in the file as to which colour space the RGB values refer to. It will give you the effect you want. If you were to select "Convert to Profile", this ...


4

If you have a spyder 5 pro it will give you a chart and percentages of coverage for srgb, ntsc, and adobe rbg Here is my srgb result


4

If the original ICC profile is sRGB or equivalent, there is usually no harm from removing it. sRGB is sometimes added to images that were not originally color managed. (The profile shouldn't be included with the image in the first place.) sRGB corresponds to the full color range of unmanaged systems. (Whether the image is tagged or not, it will appear the ...


4

Adobe RGB image in a monitor that only displays sRGB? I'm not sure if here lies a misconception. A monitor does not only displays sRGB or Adobe 1998, they display a percentage of them. If a monitor displays 100% sRGB color space it will display a percentage of the other (70%-80% ish. I'm not sure at the moment). I am sure you have seen the typical graph ...


4

This is a valid concern. My understanding of your question is that it's a monitoring problem rather than editing problem. That is, when you are editing an sRGB photo, you specify that your current worskpace is sRGB, instead of converting it to AdobeRGB first. In this case, all your editing is happening with full 8 bits (or 16/32 if you select so in the ...


3

CMYK is based off of offset printing capabilities where you are using only specific shades of Cyan, Magenta, Yellow and Black ink being laid down from separate printing plates to print full color. It isn't mechanically capable of reproducing very saturated colors. But ... most photo inkjets don't expect you to send generic CMYK files to them. They have ...


3

There's a lot of confusing articles on gamma correction with many vague references to gamma and human vision. The reason for gamma is historical and a result of the response curve of the old CRT-type monitors (nothing to do with human vision). With modern day flat screens there is no logical reason for gamma encoding and subsequent correction, but it has ...


3

Yellow is not a native color of the monitor. The screen is composed of red, green and blue sub-pixels. If red, green and blue all look fine, then something else is going on with the yellow. There is a good possibility that this is a physical limitation of the screen's color gamut, since you said that full red and full green look the same, but full red and ...


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