Interesting thought.Quote:
Originally Posted by xpatUSA
In the tests (or at least, all the ones I had more trouble with), the colours being displayed were all rather unsaturated, pastel shades. In those, at least, the appearance should be the same on wide or narrow gamut monitors (as they are likely to be within the gamut of all monitors).
However, although the colours may be the same on any (calibrated and profiled) monitor, the spectral composition will depend on the primaries of the monitor. For example, a narrow-gamut monitor might have a green primary roughly the same as sRGB (x=0.30, y=0.60) but a wide gamut monitor (my Eizo, for example) has a green primary about x=0.197, y=0.723.
In other words, whatever the calibration of the monitor, all the test patterns will be composed of various combinations of the R, G and B primaries for that monitor - which will differ from monitor to monitor.
However, I can't immediately figure out what that means for the tests. For example, suppose one is trying to distinguish between two pastel shades. Will it be easier if those shades are composed of some combination of 3 widely-spaced (highly saturated) primaries, or a different combination of 3 more narrowly spaced primaries? For a person with normal colour vision it shouldn't matter - the colour will be the same in both cases. But for someone with a minor color defect? I don't know enough to figure that out.
How's you color vision? (test)
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5th July 2015, 04:27 PMSimon GarrettRe: How's you color vision? (test)
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5th July 2015, 04:57 PMxpatUSARe: How's you color vision? (test)And I recall that the paper prints for the RAF eye-test were similarly shaded.Quote:
Originally Posted by Simon Garrett
Don't know enough, either. A step might be to transform to CIELAB and then calculate color differences (delta-E) but that would be seriously anal, even for me ;)Quote:
In those, at least, the appearance should be the same on wide or narrow gamut monitors (as they are likely to be within the gamut of all monitors).
However, although the colours may be the same on any (calibrated and profiled) monitor, the spectral composition will depend on the primaries of the monitor. For example, a narrow-gamut monitor might have a green primary roughly the same as sRGB (x=0.30, y=0.60) but a wide gamut monitor (my Eizo, for example) has a green primary about x=0.197, y=0.723.
In other words, whatever the calibration of the monitor, all the test patterns will be composed of various combinations of the R, G and B primaries for that monitor - which will differ from monitor to monitor.
However, I can't immediately figure out what that means for the tests. For example, suppose one is trying to distinguish between two pastel shades. Will it be easier if those shades are composed of some combination of 3 widely-spaced (highly saturated) primaries, or a different combination of 3 more narrowly spaced primaries? For a person with normal colour vision it shouldn't matter - the colour will be the same in both cases. But for someone with a minor color defect? I don't know enough to figure that out.
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8th July 2015, 09:46 PMDavidgypsyRe: How's you color vision? (test)
Come back, oh beloved 128K Macintosh with it's singing 3.5" drive and it's only connection being to the world's noisiest dot matrix printer . . .[/QUOTE]
And how many disk swaps were required to copy 128 Kb??? -
8th July 2015, 10:35 PMxpatUSARe: How's you color vision? (test)Boy, that's a tough question . . . gosh, golly . . . ummmm . . . .Quote:
Originally Posted by Davidgypsy
. . . and the answer is 0.32 disk swaps :D
Tell me you didn't think that the original 3.5 floppies were less than 128K capacity?