Re:MacBook Pro, Thousands of Colors
by jws on Friday July 17, 2009 @03:37PM
(#710604)
Continuing our long, invisible thread…
2^6 = 64, but I have red, green, and blue pixels, so times three, but subtract two because all the blacks are the same.
I suppose I'll need to write a small article on this with some pictures. In the process of researching this I was impressed with how useless macrophotography of a screen was. Small changes that are obvious to the human at a distance are invisible when looking at the individual r,g,b elements up close.
I'm away from my camera that can output RAW data, maybe with it and some numerical image analysis I can tell if there is multipixel dithering going on, but my human eye isn't going to tell, even from magnified pictures.
Re:MacBook Pro, Thousands of Colors
by duskwuff on Sunday July 19, 2009 @03:09AM
(#712703)
There's a much easier way to demonstrate multipixel dithering: create a 50% gray bitmap (the scrollbar on an xterm works fine for this) and drag it around on screen. If you see weird color effects, there's multipixel dithering happening.
2^6 = 64, but I have red, green, and blue pixels, so times three, but subtract two because all the blacks are the same.
I suppose I'll need to write a small article on this with some pictures. In the process of researching this I was impressed with how useless macrophotography of a screen was. Small changes that are obvious to the human at a distance are invisible when looking at the individual r,g,b elements up close.
I'm away from my camera that can output RAW data, maybe with it and some numerical image analysis I can tell if there is multipixel dithering going on, but my human eye isn't going to tell, even from magnified pictures.