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Re: computer screen icons
12/31/96 Geoff Boyle wrote:
> In telecine, we would get off color highlights in various
> areas on the monitor, we were able to compensate and remove these odd
> colored areas in the telecine, but the colorist said this was a common
> problem with screens when photographed with macro lenses, and what I was
> seeing was rather minor. We never had the problem on the full screen
> shots, just the close ups.
If you shoot say a 768 line 75 Hz Mac full screen, considering the loss
of definition all along the screen-to-film chain, your 500/600 active
lines telecine 'sampler' will see the film image of that PC monitor
screen as a continuous structure (thus no artifacts).
Whereas if you shoot close ups with a macro lens, your film image
perfectly records the coarse computer screen structure in which the
telecine sampler will later not only 'see' the lines but the phosphor
triads too: a piecemeal for 'beats' and artifacts of all sorts.
If you want to film a computer screen icon, I suggest the following
(I just tried that for you five minutes ago):
On the very computer you are shooting at, make a 1x1" 'Screen Grab'
of the desired icon, you will get a PICT file of around 12 Kbytes.
Open it with Photoshop (I hope the kind of clients you work with have
that software in their computers), and blow it up 4 to 8 times using
the Photoshop magnifier.
Since the icon is now an 8 x 10" poster you can film it through your
standard lens with no risk at all to see your colorist
beating against color beats!
Jean-Pierre Beauviala jpb at aaton.com www.aaton.com