Hacker News new | ask | show | jobs
by giingyui 346 days ago
It’s not ghosting, it’s halation as that bloke said. Bright things do not leave a trail, instead they are just blurry.

If I see a white LED in the dark, the LED shows some sort of smear at a certain angle and with a certain length. The length of the smear decreases the closer I get to the LED. It doesn’t change ever, even if days pass, because it’s a static deformation inside my eye. It does not leave a trail if I look around or if I move the object with the LED.

This also applies to white letters on a black screen. They are smeared at an angle. If I’m far away enough and/or the letters are small enough the smear is so large that they make it hard to read and make me nauseous. That’s why I ended up buying the glasses.

https://pixelbuddha.net/storage/51621/how-to-create-a-motion...

This is an example. The trail is not as long but it’s brighter. (Just googled “motion blur letters” - the effect is similar)

1 comments

Oh! I see, I guess the "then look at a bright surface" part of that other post made me think of that an image stays with you for a short time (a ghost image), but I get what you mean now