A brief discussion of "gamma" in display and visual systems

[@Redz]

Thank you for teaching me some stuff today! Great explanation. Merci beaucoup!

[@fdagpigj]

This seems really useful and well explained, at least to a programmer who has next to no knowledge about graphics. Thanks

[@scientist30]

Thanks i was trying to understand it. Now it make sense.

[@Moppup]

Never heard anyone explain this before, thanks!

[@sausytime]

This was an amazing video! 10/10.

[@Haaaaaaaa_]

Super interesting man, keep it up!

[@_KK]

Great video about gamma! Welcome back theo, interestingly very close to what I wanted to talk about in my next video about 3 bit RGB display in Minecraft using lamps and coloured glass in front. My conclusion was that normal lamp display that represents binarized black and white image is just enough to display practically anything. At the end of the day some Macintosh had a pretty good UI although had just 2 colours. With big enough display and good dithering algorithms it basically becomes monochrome grayscale (well more like brownscale because of lamps). Also I quite liked your dithering algorithm, yes it doesn't look too great, but in terms of computing speed its substantially faster than all others. Another interesting close topic is binarization algorithms, local methods like Sauvola's or Wulff's or Bradley's give a very unique look and in terms of lets say text readability probably better than all dithering algorithms (because it highlights edges, useful for OCR) By the way you misspelled antialiasing :p

[@theosib]

The speed might be faster or slower, depending on the speed of the random number generator. Floyd-steinberg is actually really lightweight to compute.

[@acheronexile]

Wonderful video, I love your style when approaching a difficult subject, the simplified parts were amazingly well detailed and seem to be spot on representations of reality, especially the part concerning the human eye. I also loved when looking at the intermediate coin version of the grey scaling, my eyes and brain automatically started predicting the combined total must look more like 75% to trick my eyes, amazing that I only overshot my estimation by 2% according to your wonderful math skills. Extremely engaging, entertaining and educating!

[@Shack263]

How do you know if colours should be mixed in luminance space or perceptual space? What might be the use cases of each? It seems moving things into luminance space is common both for proper AA and blurring.

[@jacobroper6276]

I apologize if this is a bit of a bastard of a question, but what does it mean to perceive light as "twice as bright?" How accurately can we even correlate changes in light intensity with perceived brightness?

[@theosib]

There's a lot of formal research on the topic, and it's based on having human test subjects try to detect just noticable differences between different gray levels.