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— | blog:2021:09:08:2021-09-08_-_shoe_color [2021/09/08 20:02] (current) – created basz | ||
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+ | ====== 2021-09-08 - shoe color ====== | ||
+ | shoe colors? seriously? yes... but obviously not because of a shoe. interestingly, | ||
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+ | some time ago i was asked by a friend of mine, what is the collor of this shoe: | ||
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+ | {{: | ||
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+ | turns out that this was a fairly common photo sent around on the internet, around 1-2yrs ago. | ||
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+ | it's pink to me. but it turns out that many ppl see it as gray, instead. so it got me thinking... | ||
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+ | ===== 1st approach ===== | ||
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+ | my 1st guess was that it's the same thing as with blue and green colors. the wavelengths of these two colors are next to each other, so around midway in between " | ||
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+ | ===== 2nd approach ===== | ||
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+ | these must be close to each other in color space, then! so let's see how our [[https:// | ||
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+ | * " | ||
+ | * " | ||
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+ | ok -- not exactly the same, but also not super far away... | ||
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+ | let's give it a shot in another color model, namely HSL/HSV: | ||
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+ | * " | ||
+ | * " | ||
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+ | now the proximty can be seen much better! only the last parameter is off by around 1/4. | ||
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+ | due to the above, there are some " |