Why we're blind to the color blue
calebkruse.com
Why we're blind to the color blue
1–10 of 218 posts
Re: Why we're blind to the color blue
#2I’ve always found blue LED or cold cathode signs absolutely illegible at night - just an amorphous blur. I always thought it was just me.
Re: Why we're blind to the color blue
#3The second to last demonstration blows my mind. I can't help but feel like I'm being duped, the result is so sharp.
Re: Why we're blind to the color blue
#4If you like this, you'll very much enjoy this exploration of color and chroma keying in cinematography: https://www.youtube.com/watch?v=aO3JgPUJ6iQ
Re: Why we're blind to the color blue
#5Blue LEDs and black lights show this effect very clearly. This is e.g. described much more succinctly in the top comment here: https://www.reddit.com/r/askscience/comments/3c1qsg/why_do_b...
> 2 reasons: 1) You don't have the nearly as many short wavelength detecting blue cones as you do red and green in your fovea. 2) The angle of refraction is dependent on wavelength and short wavelengths get refracted more than relatively longer ones by your eye and therefore focus in front of your retina if you are myopic (nearsighted). The black lights are throwing off a ton of very short wavelength light and when coupled with the larger pupil you have in the dark it sets your eye up for a bunch of chromatic aberration. They should look clearer if you are hyperope or overcorrected in your myopic prescription, or if you view them at a closer distance.
Re: Why we're blind to the color blue
#6This is amazing to see. We should use this for image optimization. When we compress channels, we should compress the blue channel to like 30% while keeping others at fairly large 80% and it might appear better than a 60% compressed image.
Re: Why we're blind to the color blue
#7This is amazing to see. We should use this for image optimization. When we compress channels, we should compress the blue channel to like 30% while keeping others at fairly large 80% and it might appear better than a 60% compressed image.
That’s exactly why images tend to be compressed in a YUV colour space instead of an RGB one.
Re: Why we're blind to the color blue
#8Interestingly, many ancient text sources do not speak of blue color at all, using other expressions.
Re: Why we're blind to the color blue
#9[deleted]
Re: Why we're blind to the color blue
#10Snell's work on optics would later be overshadowed by the GNU alternative, Fresnel.