AW: OT: are 72dpi still state of the art for screen design?

[Tiemo Hollmann TB]

Hi Colin and Terry,

thank you both for your pixel coaching. I wasn't aware of all those details.
Thanks for jumping in
Tiemo


> -----Ursprüngliche Nachricht-----
> Von: use-livecode-bounces at lists.runrev.com [mailto:use-livecode-
> bounces at lists.runrev.com] Im Auftrag von Terry Vogelaar
> Gesendet: Dienstag, 3. Mai 2011 07:16
> An: use-livecode at lists.runrev.com
> Betreff: Re: OT: are 72dpi still state of the art for screen design?
> 
> Hi Tiemo,
> 
> I like to supplement to what Colin is saying, that as long as we talk
about
> screens, there is practically no way to tell how large a pixel is. So you
can
> fill in whatever measure suits you. On screens, the only 'true'
measurement is
> pixels.
> 
> Currently I have an external screen attached to my iMac. The built-in one
is
> 110 ppi (pixels per inch; dpi is only correct for printers), and the other
> screen is 86 ppi. Should it recalculate all measurements to compensate
that
> difference? I don't think so, and neither do the makers of the system
> software. So when I drag a window from one monitor to another, I see it
> enlarge.
> 
> The OS actually cannot know how large a pixel is on the monitor it is
> displaying on. Take LCD projectors for example. I use an 1024 x 768 pixel
> setting to project on a screen, but there is no way for the software to
know
> how large a pixel on the screen is. It might be in a range between 5 and
25
> ppi.
> 
> So, you can follow the old Macintosh convention of 72 ppi, or Windows with
its
> 96 ppi standard. Both are equally incorrect and irrelevant. Use whatever
value
> that suits you. The number of pixels per inch only starts to matter when
you
> print the image. Only then the dimensions of the image become measurable
with
> a ruler.
> 
> 
> Terry
> 
> 
> 
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