berry@stsci.EDU (Jim Berry) (04/26/89)
I was approached recently by someone who wanted to be able to display
8 bit 512X512 images from disk at a rate of about 10 per second. Would
this be a big/middle/no sweat/not likely deal using a typical Personal
Iris setup (if I had one I wouldn't have to ask :-) ? What kind of data
rate can you achieve, and what do you have to do to get it?
PS - Thanks to those who responded about booting the 4D without a console.
No problem. Now I just have to convice Alias that there is such a thing as
the 4D Owner's Manual and that they should send us one (I guess that's what
we get for not buying direct from SGI).
--
------------------------------------------------------------------------------
Jim Berry | UUCP:{arizona,decvax,hao}!noao!stsci!berry
Space Telescope Science Institute | ARPA: berry@stsci.edu
Baltimore, Md. 21218 | SPAM: SCIVAX::BERRY, KEPLER::BERRYmike@BRL.MIL (Mike Muuss) (04/27/89)
512x512x8 * 10 fps = 0.25 MBytes * 10 fps = 2.5 MBytes/sec. That is pretty clost to maximum speed for a 3.0 Mbyte/sec disk drive I have not been able to get better than about 2 fps (512x512x24) on a personal iris (but I have not tried extraordinarily hard yet-- just doing the obvious libgl stuff); that should translate to about 6 fps in 8-bit mode (which will have to be 12-bit color-map mode, there is no 8-bit mode). This may be good enough for you. There is a nifty machine from DuPont Pixel Systems that has an IBIS 10 MByte/sec disk drive married to an image processing system. The demo at NCGA was pretty impressive. If 10 fps is a minimum requirement, you will have to look for special solutions such as this. Jim -- your best source for local info is Lee Butler, also located at ST. Best, -Mike