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Thread started 05 Jun 2017 (Monday) 13:15
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How to choose a color profile?

 
OhLook
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Jun 05, 2017 13:15 |  #1

I got a new computer, a MacBook Pro made in 2015, and don't know what setting to use for a color profile. The choices are so numerous that I needed two screenshots.

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"Color LCD" is the default. (In fact, it appears twice.) Would another one more accurately show photos on POTN as the photographers intended, and would it more accurately show viewers my photos on POTN as I intended them to be seen?

Would any of these profiles correct for the failure of my Canon G15's sensor at fully representing purple? It always removes some of the blue, independently of the WB setting.

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Jun 05, 2017 19:48 |  #2

If you don't have a hardware calibration device to do your own calibration I would first try using the Colour LCD Calibrated profile. In your editing software of choice, so that you can be sure it is colour managed (I'm not too sure about colour management in Mac programs, but your editor should be managed) open one or two reference images and check that they look good. I'm guessing the calibrated profile was done using hardware calibration by a previous owner.

If it looks obviously wrong when viewing the calibrated profile, I would revert to the Colour LCD profile, which should be a standard default profile for the screen. I would then do the check with the reference image file again, just to make sure no one has been really screwing around with the system.

If you want to have better colour consistency between output devices, then you should really be using a hardware calibration device regularly. Then as long as you are working in a colour managed workflow you images should have reasonably accurate output. If you also use a fully colour managed web browser, Safari on OSX is one such, then if others are using images that are not sRGB, and they are correctly tagged then the colour should be accurate.

Since many hosting sites will simply strip ALL the EXIF/IPTC data from an image file, using anything other than sRGB can still be asking for trouble. It's probably OK if you are hosting your own images to use other than sRGB, but considering the potential issues for others viewing your images on essentially unmanaged systems I would only post images in sRGB. The images will still be accurate for those with managed systems, but by using the defaults you can at least know that your images will look as good as the other persons system will allow.

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OhLook
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Jun 05, 2017 21:05 |  #3

BigAl007 wrote in post #18371897 (external link)
I'm guessing the calibrated profile was done using hardware calibration by a previous owner.

Although this machine isn't the latest model, I bought it new. Whatever it's got, Apple provided. As Color LCD Calibrated looks just like Color LCD, I think it's there to choose after calibration.

If you want to have better colour consistency between output devices, then you should really be using a hardware calibration device regularly. Then as long as you are working in a colour managed workflow you images should have reasonably accurate output. If you also use a fully colour managed web browser, Safari on OSX is one such, then if others are using images that are not sRGB, and they are correctly tagged then the colour should be accurate.

. . . considering the potential issues for others viewing your images on essentially unmanaged systems I would only post images in sRGB.

Unfortunately, I don't have the vocabulary to understand everything you wrote. My preferred browser is Firefox.

The default looks best to me, the most realistic and most appealing. Some of the others are very dark, even muddy. sRGB isn't very different from Color LCD.

Thank you, Alan.


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Jun 05, 2017 21:19 |  #4

I use sRGB on mine.


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Jun 05, 2017 22:16 |  #5

What software do you use to edit your photos? Programs like Photoshop have the ability to let you proof your image in sRGB space (which is the standard colorspace for websites). To keep things simple, you can keep your OS set to sRGB. I don't though. I went ahead and bought a monitor color calibrator. It comes with software and will run tests on your monitor to create a color profile that takes advantage of your monitor's colorspace. Before I delve further, here's an article on what the different display colorspaces are: adobe-rgb-vs-srgb-vs-prophoto-rgb (external link)

New expensive monitors have colorspaces that can render greater then sRGB, but laptop monitors tend to be able to cover sRGB. This article reviews the 2015 macbook: macbook-pro-retina-color-accuracy (external link). It states that the monitor covers sRGB. Getting it calibrated with with a calibration kit will help ensure that images look the same on your display, websites, and printers.


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Jun 05, 2017 22:43 |  #6

davesrose wrote in post #18371999 (external link)
What software do you use to edit your photos? . . . To keep things simple, you can keep your OS set to sRGB.

Think unsophisticated, and try not to laugh (or spit). I currently use ImageBrowser (Canon), Preview (Apple), and Photos (Apple), because no one of them is good at everything I want. I usually cull and crop in ImageBrowser and then color-correct and resize in Preview. Photos has a few tools the others lack, which I use for some images. I don't make prints or have a website.

I'm keeping it simple.


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Jun 06, 2017 06:32 |  #7

OhLook wrote in post #18371948 (external link)
Although this machine isn't the latest model, I bought it new. Whatever it's got, Apple provided. As Color LCD Calibrated looks just like Color LCD, I think it's there to choose after calibration.

Unfortunately, I don't have the vocabulary to understand everything you wrote. My preferred browser is Firefox.

The default looks best to me, the most realistic and most appealing. Some of the others are very dark, even muddy. sRGB isn't very different from Color LCD.

Thank you, Alan.


OK you are not really working in a colour managed workflow, which means that all of your hardware has been calibrated with a hardware device. You can be semi managed if you are at least using the correct manufacturers profiles for each device. This gets harder when you start to add printing, since changing any one of physical printer, the ink used, and the paper make/type will mean that you will need a different .icc profile for correct colour matching. Using the default profile on a new computer should be pretty close to good.

The .icc profile is the system that matches RGB values in an image, to make sure that all devices actually output the correct colour. It is essentially a big table of offset values to use to make different hardware produce the same rose pink colour for example. There are generally two types of profile, working and device. Generally working give you a standard to work from, which then makes converting the image to hardware much easier. sRGB although a working profile, was designed to match a "standard" monitor, so it should normally be very close if used as a hardware option. The other profiles are not designed to be used as display profiles.

Checking the show profiles for this display only box would be a very good idea, since it will show the profiles that Apple provided for the display, and none of the profiles for other devices, or any working spaces.

If Apple did a hardware calibration at the factory that would be the one with calibrated in the name, this seems most likely, as you normally name your own profile when you calibrate. If the Apple default profile is any good, then you should see no difference between it and the "calibrated" profile.

I would strongly suggest getting some standard test images to check, There are some links to standard images here (external link), as well as some useful information on colour. I believe Keith is a POTN member. It is always useful to have some good standard images to hand.

Firefox as a browser is fully colour managed, but you do need to turn it on in the preferences. That way if anyone has been foolish enough to use a profile other than sRGB you should see the correct colours. That does still rely on the icc profile in the EXIF data not getting stripped out at some point. Unfortunately that can happen a lot, so in general it is best to stick to using the sRGB profile, which is the standard for the net.

Alan


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Jun 06, 2017 06:50 |  #8

I bought one of these and calibrated all my monitors, and also created a matching printer profile, so that my screen and prints are identical. We can also use this get color codes from furniture or walls for home decoration or home improvement tasks.

http://xritephoto.com/​colormunki-photo (external link)

Very easy to use and when it's done, you will be able to see a new ICC color profile with munki in the name.


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How to choose a color profile?
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