Скачать или смотреть A Granger Rainbow test image tests your monitor and printer gamuts. Is there a best colour space?

How the free Granger Rainbow test image shows up potential problems with screens, prints and the colour spaces you work with. Should you be concerned if you see problems? Why a realistic approach to colour management gives great results without having to spend a fortune on new monitors and printers.

#printing #colormanagement #gamut #colorspace #iccprofile

Versions of the image are available in a number of colour spaces for easy experimentations whatever software you use for your photo printing and editing.

The test images can be found in my collection of free ones at
https://www.northlight-images.co.uk/p...

Do read the notes too:
"It’s important to remember that these are mathematically generated files, so to see the files as images, they need to go through a process where an ICC profile is assigned to map the numbers into ‘colours’. This is so, whether you look at them on a screen or print. This happens (behind the scenes) even if you just double click the file to open in the default viewer for your computer. I’ve got Photoshop set to warn me when opening files with no embedded profile and offer me options to assign one.
After assigning a profile, the data in the target defines the extremes (imagine just the shell of an egg) of that colour space (profile) and provides a way of evaluating how faithfully your output device handles those colours. The theory being that if it reproduces the extremes well, any colours within that space should also reproduce well.
For a simple example with your monitor, try opening 3 copies of the RGB file, assigning sRGB, Adobe98 and ProPhoto to the images. Now look at the images on your monitor at the same time. The sRGB version has a full range of colours in the sRGB colour space – hopefully this should look smooth without hard transitions."

The article about printing bright colours is at: https://www.northlight-images.co.uk/a...

For more about colour space choices see my articles via:
https://www.northlight-images.co.uk/c...

All my printer profiles from reviews are available in return for a Ko-fi donation, see:
https://www.northlight-images.co.uk/k...

00:00 Start
00:26 The Granger Rainbow
01:40 What is the gamut?
02:53 Getting the test images
04:48 Assigning a profile to give meaning to the numbers.
05:45 Profiles to check your monitor
06:18 Yes, we use sRGB
09:34 How Prophoto causes problems
10:15 How this relates to editing
11:12 Printer spaces are different
14:36 Printing the rainbows
15:08 Profiles and rendering intents
16:20 The book you really should read
17:20 Try it out!

The Colour Management book referenced can likely be found used:
“Real World Color Management ” Fraser et al
ISBN-10 ‏ : ‎ 0321267222
ISBN-13 ‏ : ‎ 978-0321267221

For a full categorised index of all my videos, see:
https://www.northlight-images.co.uk/k...
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