[Tig] 8k IMAX scans... 16k next

[Jack James]

and maybe one day Quicktime will support 4k images...

On Wed, Jul 30, 2008 at 10:31 AM, Kevin Wheatley <hxpro at cinesite.co.uk>wrote:

> 1940 subscribers as of July 2008
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>  ====
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>
> Simon Burley wrote:
> >> I imagine that their Shake helper was a RAM-disk cache manager to keep
> >> performance up. Shake itself should be fine in 32-bit.
> >
> > I reckon you're right. I'll ask Paul when I see him or Andy Lockley
> > (DNeg's compositing supervisor) next. Bear in mind though that DNeg's
> > pipeline was all floating point, so a single 8k frame in Shake would have
> > allocated 805MB and 32 bit applications are limited to addressing 4GB
>
> which means about 2.7GB of usable data space, now Shake tries really
> hard not to use the full frame at once. but some global image
> operators need all the data, shake also uses RGBA buffers most of the
> time for images, as well as a sub-sampling proxy mechanism,
> multi-layered cache mechanisms etc. Not that it doesn't have some
> crazy issues with all of these!
>
> 4K Photoshop falling over... well for the kind of work we would do for
> '2K' environments we already use Photoshop on images that are many,
> many times larger and have run into problems with compressed files
> that are larger than 2GB - poor 32 bit signed/unsigned handling bugs
> in file I/O libraries, etc. For '4K' work your going to hit those
> sooner, shortly followed by the 4GB barriers which drives you to 64 bits.
>
> Kevin
>
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> | Kevin Wheatley, Cinesite (Europe) Ltd | Nobody thinks this      |
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