Empireoflight's Journal
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10/02/2008 22:16 #45906
Crazy photoshop dialogue boxCan photoshop jam any more layers onto their pattern fill dialogue? Maybe they do in CS4, or maybe they fix this mess:
04/21/2008 14:41 #44083
better pic...
zobar - 04/21/08 16:16
My guess is code optimization and/or floating point error. When I do the same thing on my computer [Photoshop CS3 Mac Intel v10.0] I get:
Top: L=#3d R=#3d
Left: T=#39 B=#36
Right: T=#39 B=#36
Bottom: L=#3d R=#39
...which I think is even weirder - the top is symmetric but the bottom isn't. Notice also that the stroke in your picture is asymmetric.
Furthermore - and this may or may not be a factor - in Photoshop the '.0' point is not exactly between pixels but shifted over and to the right by epsilon. So the top left subpixel in your drawing is at (0,0) but the bottom right subpixel is actually (11.999…,11.999…)
Antialiasing is dark magic, and I wouldn't count on it working one way or another, or even making sense necessarily.
- Z
My guess is code optimization and/or floating point error. When I do the same thing on my computer [Photoshop CS3 Mac Intel v10.0] I get:
Top: L=#3d R=#3d
Left: T=#39 B=#36
Right: T=#39 B=#36
Bottom: L=#3d R=#39
...which I think is even weirder - the top is symmetric but the bottom isn't. Notice also that the stroke in your picture is asymmetric.
Furthermore - and this may or may not be a factor - in Photoshop the '.0' point is not exactly between pixels but shifted over and to the right by epsilon. So the top left subpixel in your drawing is at (0,0) but the bottom right subpixel is actually (11.999…,11.999…)
Antialiasing is dark magic, and I wouldn't count on it working one way or another, or even making sense necessarily.
- Z
04/21/2008 10:45 #44078
Weird photoshop antialiasingI made that by drawing a circle-shape in a 12x12 pixel file in photoshop, and snapping the shape to a 1x1 pixel grid. It should be perfectly symmetrical, both horizontal and vertical.
Why are pixels that should be the same value different?
weird...
empireoflight - 04/21/08 14:47
Thanks for the comment enknot, it's true that photoshop makes the squares grey because the vector falls between two pixels. It probably uses some calculus to figure out the percentage of the pixel that lies inside the vector vs. outside and shades the pixel to that level of gray. But those pixels I'm pointing out should technically have the exact same section of the vector lying across them, just rotated/flipped. So it makes no sense why photoshop doesn't color shade those pixels exactly the same gray.
Thanks for the comment enknot, it's true that photoshop makes the squares grey because the vector falls between two pixels. It probably uses some calculus to figure out the percentage of the pixel that lies inside the vector vs. outside and shades the pixel to that level of gray. But those pixels I'm pointing out should technically have the exact same section of the vector lying across them, just rotated/flipped. So it makes no sense why photoshop doesn't color shade those pixels exactly the same gray.
enknot - 04/21/08 14:30
It think it's because squares are not circles, and can never really make them, but it's easy enough to trick the human eye if you use some averages and percentages.
The % of the square that was inside the circle probably directly correlates to the amount of gray it is.
This is just an (educated) guess, but if you calculated the amount of space that those squares overlap with that circle, you could find the ratio that the pshop people use to calculate anti-aliasing stuff...
just a guess though really.
It think it's because squares are not circles, and can never really make them, but it's easy enough to trick the human eye if you use some averages and percentages.
The % of the square that was inside the circle probably directly correlates to the amount of gray it is.
This is just an (educated) guess, but if you calculated the amount of space that those squares overlap with that circle, you could find the ratio that the pshop people use to calculate anti-aliasing stuff...
just a guess though really.
04/18/2008 23:05 #44047
leopardJust got it on my macbook pro. Plus I got 2 gig ram, so if things seem faster, I can't be sure if its the os or the ram. I like the perpendicularity of the icons...I don't quite "get" the meaning of the icons though. E.G., why is library represented by a classical temple?
04/14/2008 12:58 #44007
Bethune HallBethune Hall is an old building on Main near Hertel. I did a couple years of art school there, back in 89-91 when it was part of UB.
It's for sale, so I called the number. 1.5 mill. It would probably cost that much to fix it, as it's pretty messed up. Still, it would be an awesome set of art studios.
It's for sale, so I called the number. 1.5 mill. It would probably cost that much to fix it, as it's pretty messed up. Still, it would be an awesome set of art studios.
empireoflight - 04/14/08 18:18
Oh yeah? Who was it? I was in foundations mostly those years, got into printmaking and illustration in 90/91, I had Adele for MFA in 95/96
Oh yeah? Who was it? I was in foundations mostly those years, got into printmaking and illustration in 90/91, I had Adele for MFA in 95/96
ajay - 04/14/08 16:22
Hey, I had a friend who was an art student around that time in Bethune Hall. She was Adelle's student (print making, intaglio). The stories she told me about that place...
Hey, I had a friend who was an art student around that time in Bethune Hall. She was Adelle's student (print making, intaglio). The stories she told me about that place...
haha.. that reminds me of that "photoshop for the iphone" spoof on youtube!