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How much oranger do red orange bags make oranges look?

alexanderell.is

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Re: How much oranger do red orange bags make oranges look?

#31

Post by Aloisius »

dmurray wrote: post #26

The best oranges [0] I've had were half green. Fresh from the tree, but still plenty ripe. It's my understanding that oranges for transport to colder countries are picked unripe and ripened in the holds of cargo ships. This ripening process is great at making the skin more orange, and OK at improving the flavour, but nowhere near as good for that as ripening on the tree. So if I saw green patches on my supermarket or…

How green an orange is when ripe has to do with the climate they are grown in. In warm climates with little variation in temperature between day or night, oranges will remain green on the tree even when ripe. If nights get cold enough (~55 F), they will turn orange.

That said, in the US, oranges destined for markets de-greened for aesthetic purposes since customers won't generally buy them otherwise.

Re: How much oranger do red orange bags make oranges look?

#32

Post by amarshall »

windsignaling wrote: post #17

This is interesting because it shows us how a programmer thinks of a problem vs. how a psychologist or neuroscientist would think of this problem and highlights the lack of "human-ness" in programmer thinking. I'm no fan of schools forcing STEM students to study boring electives but this is a prime example of why that might be useful. The entire premise of the post is wrong - average pixel value has nothing to do wit…

See also this popular “optical illusion”: https://en.wikipedia.org/wiki/Checker_shadow_illusion

Re: How much oranger do red orange bags make oranges look?

#33

Post by Clamchop »

dmurray wrote: post #26

The best oranges [0] I've had were half green. Fresh from the tree, but still plenty ripe. It's my understanding that oranges for transport to colder countries are picked unripe and ripened in the holds of cargo ships. This ripening process is great at making the skin more orange, and OK at improving the flavour, but nowhere near as good for that as ripening on the tree. So if I saw green patches on my supermarket or…

Oranges and other citrus are examples of non-climacteric fruits, meaning they do not continue to ripen after being picked. So, they have to be picked at the desired level of ripeness.

Re: How much oranger do red orange bags make oranges look?

#36

Post by croes »

xandrius wrote: post #22
windsignaling wrote: post #17

This is interesting because it shows us how a programmer thinks of a problem vs. how a psychologist or neuroscientist would think of this problem and highlights the lack of "human-ness" in programmer thinking. I'm no fan of schools forcing STEM students to study boring electives but this is a prime example of why that might be useful. The entire premise of the post is wrong - average pixel value has nothing to do wit…

You saw someone making a bunch of observations, setting up an experiment and trying to use maths/programming to prove an hypothesis they believed to be a sign of "lack of human-ness"? To me it showed curiosity and ingenuity, sure they might not have studied a certain subject but it is a totally valid approach to an unknown problem. It might actually get people who have similar "silly questions" to run a similar set o…

I read the lack of human-ness as locking at the wrong place.

It’s not reality that changed because of red net but our perception of it.

The solution isn’t in the oranges but our brain

Re: How much oranger do red orange bags make oranges look?

#37

Post by johncalvinyoung »

ThePowerOfFuet wrote: post #8

Wait, is that "local grocery store" selling those oranges for $2.49 _each_?!

Not a typical orange. “Sumo Citrus” / dekopon / shiranui is a hybrid tangor/tangerine cross. Very fragile, specialty fruit, only recently available at scale in the eastern US. This is on the high end per-fruit but I’ve seen higher. I usually buy in cases at ~$1.25 per fruit.

Re: How much oranger do red orange bags make oranges look?

#38

Post by aaron695 »

windsignaling wrote: post #17

This is interesting because it shows us how a programmer thinks of a problem vs. how a psychologist or neuroscientist would think of this problem and highlights the lack of "human-ness" in programmer thinking. I'm no fan of schools forcing STEM students to study boring electives but this is a prime example of why that might be useful. The entire premise of the post is wrong - average pixel value has nothing to do wit…

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Re: How much oranger do red orange bags make oranges look?

#39

Post by johncalvinyoung »

alwa wrote: post #14

It makes sense that adding red adds red (in addition to the avocado sacks you mention, I think of lemons’ yellow bags, limes’ green bags, and the red packaging/shelf lining and pink-tinged light in the butcher’s case)—but those images really do look strangely exposed to me. Did you do exercise any specific control over the phone’s camera? I wonder if the ring light might use the sort of general-market LEDs that under…

This was my immediate thought when I saw the ring light. Very very likely a CRI of 90 or below, which doesn’t even weight much in red shades. Not uncommon to see 92 CRI with a R9 (red) score below 50% of sunlight or tungsten illumination.

Re: How much oranger do red orange bags make oranges look?

#40

Post by Dwedit »

Warning, always convert your colors to from sRGB to Linear RGB before doing any math on them, then convert them back to sRGB afterwards for displaying them.

sRGB is the familiar color space you all know and love, it's what your display uses, and it's what has those RGB numbers between 0 and 255. But it's not a linear color space.

First think of values as being between 0 and 1 instead of 0 and 255. To change sRGB to Linear, do X^2.2 (close to squaring the value). To change Linear back to sRGB, do X^(1/2.2) (close to a square root).

In Linear RGB, a value of 0.5 is halfway between black and white. You can put a stripe or checkerboard pattern next to the color value, and it will appear to be the same brightness. But in sRGB, a value of 0.5 is much darker. Linear RGB of 0.5 is roughly equivalent to sRGB of 0.73.

The actual method of conversion involves a complicated curve that isn't continuous, using X^2.2 is still an approximation.

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