Can't you solve the problem by creating an overview window in a lower resolution and a zoom-window that can freely wander around on the big screen?
-----Original Message----- From: Alan Kay [mailto:Alan.Kay@disney.com] Sent: Tuesday, February 27, 2001 1:16 PM To: squeak@cs.uiuc.edu Subject: Re: Project layout
Right you are. Lot's of pixels are nice to have, and so is a phyically big display.
Here we were talking about the minimal criterial to do scaling, pdf, readable fonts, etc., and here the pitch plus a few other things is what matters in order not to see artifacts. A display that would be the equivalent of two facing 10" high pages would indeed be about 4M pixels which is the count that Lex mentioned. But most paper notepads or xeroxed papers are 8.5*11 with not all the boundary pixels used, so my calculation covers this physical size.
BTW, in the late sixties we were able to compute pretty accurately that the proposed Dynabook (which was about 9*12), which employed its lower quarter with a low travel keyboard and had a squarish display, needed about 1M pixels in order to simulate paper well enough for readability, drawing, and capacity.
Cheers,
Alan
------
At 5:31 AM -0500 2/27/01, JArchibald@aol.com wrote:
=> 2/26/01 10:51:03 PM EST, Alan.Kay@disney.com => << Actually, a pitch of about 150/inch and using some color selection trickery will do the job pretty darn well. So a pretty nice display would
be
about 1.9 million pixels (8" * 10.5"). >>
According to my multiplier, this is a screen resolution of 1575x1200 pixels -- a substantial information content. This is pretty good on all but the
very
largest of screens available today (which needless to say, are quite a bit bigger than 8" x 10.5").
Jerry. ____________________________
Jerry L. Archibald systemObjectivesIncorporated ____________________________
Not really -- because there are various kinds of interferences (including moire patterns, being able to see the pixels (in part because you can't do the Nyquist low pass filter on a discrete display), etc.). The pixels/inch needs to be above a magic threshold (which also varies with the contrast ratio, the exact placement of the pixels, etc.) in order to not see aliasing artifacts.
Cheers,
Alan
At 1:49 PM +0100 2/27/01, G.J.Tielemans@dinkel.utwente.nl wrote:
Can't you solve the problem by creating an overview window in a lower resolution and a zoom-window that can freely wander around on the big screen?
-----Original Message----- From: Alan Kay [mailto:Alan.Kay@disney.com] Sent: Tuesday, February 27, 2001 1:16 PM To: squeak@cs.uiuc.edu Subject: Re: Project layout
Right you are. Lot's of pixels are nice to have, and so is a phyically big display.
Here we were talking about the minimal criterial to do scaling, pdf, readable fonts, etc., and here the pitch plus a few other things is what matters in order not to see artifacts. A display that would be the equivalent of two facing 10" high pages would indeed be about 4M pixels which is the count that Lex mentioned. But most paper notepads or xeroxed papers are 8.5*11 with not all the boundary pixels used, so my calculation covers this physical size.
BTW, in the late sixties we were able to compute pretty accurately that the proposed Dynabook (which was about 9*12), which employed its lower quarter with a low travel keyboard and had a squarish display, needed about 1M pixels in order to simulate paper well enough for readability, drawing, and capacity.
Cheers,
Alan
At 5:31 AM -0500 2/27/01, JArchibald@aol.com wrote:
=> 2/26/01 10:51:03 PM EST, Alan.Kay@disney.com => << Actually, a pitch of about 150/inch and using some color selection trickery will do the job pretty darn well. So a pretty nice display would
be
about 1.9 million pixels (8" * 10.5"). >>
According to my multiplier, this is a screen resolution of 1575x1200 pixels -- a substantial information content. This is pretty good on all but the
very
largest of screens available today (which needless to say, are quite a bit bigger than 8" x 10.5").
Jerry. ____________________________
Jerry L. Archibald systemObjectivesIncorporated ____________________________
squeak-dev@lists.squeakfoundation.org
-
Alan Kay -
G.J.Tielemans＠dinkel.utwente.nl