#PhysicsFactlet
The human eyes have "only" 3 different colour receptors, so multiple spectra can be perceived as the same colour.
(And this without considering all the ways the signal is processed before you actually "see" it.) #Optics#Colour#Color#Vision
Released into the #PublicDomain and uploaded to #WikimediaCommons together with the #Mathematica script used to generate it: https://commons.wikimedia.org/wiki/File:ColorVSspectrum.webm
Before designing a website, or even making a small change to an existing one, ask if your design choices consider the needs of people with color blindness. Changing the button color on your website may seem insignificant, but it could make that website inaccessible to nearly 8% of men and 0.4% of women who have color blindness.
I was in hell and saw lost souls suffering. I went down a hill, hell was a century XVIII wooden house in victorian style all in white. I entered in, every room had a soul in torment.
Pleased to share my latest research "Zero-shot counting with a dual-stream neural network model" about a glimpsing neural network model the learns visual structure (here, number) in a way that generalises to new visual contents. The model replicates several neural and behavioural hallmarks of numerical cognition.
"A team of researchers have built a vision implant with tiny electrodes the size of a neuron, seeking to help blind people see again."
The Next Web reports: "Initial tests in mice showed that the implant can effectively stimulate visual perception using only a small amount of electricity."
What is the best way to offer you text-to-speech in my video game? Should I build it in myself? Or should I somehow make the text available to external screen reading plugins you already have installed?
What is the best way to enable text-to-speech? I'm trying to imagine how a blind person would find the toggle in a settings menu they can't see. The only way I can think of around that would be to enable it by default and have an option for users who don't want it to disable it at the beginning, but that sounds cumbersome. Is there a better middle option? Is there a commonly-used keyboard shortcut I can enable or something?
The screenshot below features Patrick Lichtsteiner and his work on mimicking retinal circuits in the design of the dynamic vision sensor (DVS), an event-based camera where the log difference of light intensity at time t and t-1 is emitted (the event), rather than a typical camera frame. This has extraordinary implications for visual processing, data transfer bandwidth and data storage.
An innovation I had missed: mixing in a DVS pixel with 15 other "normal" color pixels, in a 4x4 16-pixel macro-pixel configuration. And what for? To use the events from the fast, single DVS pixel to deblur and get sharper edges imaged by the other, slow 15 pixels. Can then use a 120 fps input plus the events to reconstruct the video at 5,000 fps (!).
Having determined that the DVS pixel noise is limited to 2x the shot noise, Tobi's group built a "Scientific DVS" targetting e.g., very fast imaging of neural activity with low noise. They've done it by tweaking the DVS pixel circuit and also binning 4 pixels together for spatial integration.
The result: 10x more sensitive.
Looking forward to seeing applications in neuronal activity imaging, which seems ideally suited for event-based imaging: large fields of view where largely nothing changes, with few, very sparse but fast changing pixels – where neurons are active.
"Conceit is epilepsy and eyesight is a lying sense."
— #Heraclitus (dubious) fragment 46
"All humans by nature desire to know. An indication of this is our liking for the perceptual capacities. For even apart from their utility, these are liked because of themselves — and most of all the one because of the eyes."
— #Aristotle, (dubious) #Metaphysics, 980a21
"With millions of people flocking to big cities and small towns to witness Monday's eclipse, hospitals are on high alert for increased traffic accidents, the potential for mass casualty events and, of course, eye damage.
Eclipse fervor will especially strain understaffed health care systems in rural towns that may not have dealt with an event of this scale."