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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?

#41

Post by brookst »

Dwedit wrote: post #40

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 L…

Even better, convert to HSL or CieLAB. RGB is not at all how our eyes see things.

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

#42

Post by SV_BubbleTime »

decimalenough wrote: post #21
thousand_nights wrote: post #11

those are some weird oranges

That's because it's not: it's a mandarin-orange hybrid. Fun fact: "dekopon" means basically "outie" (as in protruding navel, not Severance).

I’ve a few time now had to explain to older people that “no, it’s not the same things you had when you were a kid” about a few different foods.

Oranges, avocados, Brussels sprouts, and more I am forgetting. I’m receive basically the same “oh it’s the same thing!”.

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

#43

Post by firesteelrain »

I think the author is on the right track just needs to refine the assumptions a bit. Not sure if the method actually tests whether we perceive the oranges as more orange with red bags. Things like too small of a sample size, lack of any statistical analysis, uncontrolled lighting conditions, not controlling for phone camera, and simplistic color analysis (human eye is much more complex). Also lack of applicability to color science principles

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

#44

Post by _HMCB_ »

croes wrote: post #36
xandrius wrote: post #22

Earlier quoted context omitted.

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

Agreed.

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

#46

Post by dang »

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 clearly have some interesting and substantive points to make! but on HN, can you please do this without putting down others or their work?

It's all too easy to come across as supercilious and I'm afraid you crossed the line, no doubt inadvertently.

https://news.ycombinator.com/newsguidelines.html

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

#49

Post by pezezin »

basisword wrote: post #9

I think the lighting/camera work doesn't help here. The first photo of the orange...doesn't look orange. It's really dark. In the photo from the shop they look orange.

Same here, most of the pictures look really dark and not orange at all.

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

#50

Post by nkurz »

otras wrote: post #16
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…

That's a good question, and I could easily see the camera settings (and the light) being a source of error here. Naively, I used the default iPhone camera with the same exposure for each one, then ended up manually removing some of the HDR settings from each one when they were showing up as way overexposed on my computer. Not exactly an advanced, scientific technique, and there was also a bright source of soft white…

Along those lines, one big thing I worried about when reading your article was whether the camera's auto-white-balancing might be throwing everything off. I'm not sure how it works on an iPhone, but I'd suspect that presence of the red bag might cause it to reduce the redness of the rest of the image. One easy solution might be to always have two oranges in each photo---one inside the bag, and one sitting on top.
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