not seen you in ages!I was thinking about a more mathematical explanation, not about what it really does.
where've you been?
(where've you been?
kitty meow meow,
Mon 15 Dec 2003, 19:16,
archived)
I moved to England:)
actually, I'm just over here on an exchange program.
(,
Mon 15 Dec 2003, 19:20,
archived)
actually, I'm just over here on an exchange program.
It's fantastic,but I barely have time to lurk, let alone shop anything right now.
(,
Mon 15 Dec 2003, 19:24,
archived)
as long as you're enjoying yourself :)Everyone I know is over there. I wish I knew how to make freinds in real life
( kitty meow meow,
Mon 15 Dec 2003, 19:25,
archived)
Well anti-aliasing is actually a broad term for any process which removes aliasing from an image ...Like I say below, super-sampling and bi-linear filtering are two of the most common.
In things like font rendering you can calculate for each pixel not just whether it's in or out the glyph (character), but what fraction of the pixel is in or out. For a pixel 30% in the character, you fill it 30% grey.
The human eye will actually perceive a blury line/edge as straighter and finer than an on/off pixel edge when it's diagonal.
In fact recently there's been a more interesting improvement in anti-aliasing for fonts on LCD screens. You now get anti-aliasing routines for fonts which renders little bits of red or blue along the edge of the fonts (which is better than grey because the red cell in the pixel is on the left and the blue cell is on the right*).
Try zooming in on small fonts in XP on a laptop, you might be able to see it - it looks crap close up, but really makes things look sharp when viewed normally.
* - On some LCD's it's BGR etc... but you get the point.
(In things like font rendering you can calculate for each pixel not just whether it's in or out the glyph (character), but what fraction of the pixel is in or out. For a pixel 30% in the character, you fill it 30% grey.
The human eye will actually perceive a blury line/edge as straighter and finer than an on/off pixel edge when it's diagonal.
In fact recently there's been a more interesting improvement in anti-aliasing for fonts on LCD screens. You now get anti-aliasing routines for fonts which renders little bits of red or blue along the edge of the fonts (which is better than grey because the red cell in the pixel is on the left and the blue cell is on the right*).
Try zooming in on small fonts in XP on a laptop, you might be able to see it - it looks crap close up, but really makes things look sharp when viewed normally.
* - On some LCD's it's BGR etc... but you get the point.
Hagbard ... it's been a long time.,
Mon 15 Dec 2003, 19:28,
archived)
hmmmstill doesn't tell me the structure of the filter that it goes through. I understood all that before :)
( kitty meow meow,
Mon 15 Dec 2003, 19:31,
archived)
There is no 'the' filter, it can be one of a hundred things.Photoshop is probably doing something like bi-liinear or bi-cubic filtering whereas 3D graphics cards can also do semi-translucent edges and supersampling when rendering.
( Hagbard ... it's been a long time.,
Mon 15 Dec 2003, 19:34,
archived)
this is at a much higher level than I understandI've heard of these, but I'm used to thinking about filters differently, at a very introductory level.
( kitty meow meow,
Mon 15 Dec 2003, 19:36,
archived)