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Re: IDLgrVolume [message #33764 is a reply to message #33679]

Tue, 21 January 2003 02:28

s[1]
Messages: 21
Registered: December 2002

Junior Member

Hi,

some figures for a 256^3 volume (MRI) into a 500x500 window:

"highest quality" settings:
RENDER_STEP=[1,1,1],INTERPOLATE=1,LIGHTING_MODEL=1,TWO_SIDED =1

"medium quality" settings:
RENDER_STEP=[2,2,5],INTERPOLATE=0,LIGHTING_MODEL=0,TWO_SIDED =0

Pentium IV 2.4 GHz, 512MB, W2K, IDL 5.6
highest quality: 11-17s
medium quality: 0.5-1.0s

Pentium III mobile 800 MHz, 256MB, Linux, IDL 5.5
highest quality: 35-50s
medium quality: 2.0-3.0s

The time differences for a given quality come from different viewing
angles and different settings for the transfer functions (the more
transparent the slower)

For a comparison: The same data set with similar settings and similar
results in VTK on the 800 MHz Linux computer takes about 5 +- 1 seconds -
and VTK provides an "automatic" level of detail mechanism for real-time
but low-quality rendering while rotating the data set.

Hope that helps,

Sebastian

On Sat, 18 Jan 2003, lyubo wrote:

>
> Is it possible to render/manipulate a volume of size 256x256x256
>
> (or 512x512x512) in real time with IDLgrVolume, and if it is what
>
> hardware can do the job?
>
>
>
> Lyubo
>
>
>
>

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[Message index]

		IDLgrVolume By: lyubo on Sat, 18 January 2003 18:56
		Re: IDLgrVolume By: Karl Schultz on Tue, 21 January 2003 23:16
		Re: IDLgrVolume By: Paul Woodford on Tue, 21 January 2003 20:54
		Re: IDLgrVolume By: Paul Woodford on Tue, 21 January 2003 20:54
		Re: IDLgrVolume By: Karl Schultz on Tue, 21 January 2003 15:07
		Re: IDLgrVolume By: Rick Towler on Tue, 21 January 2003 13:11
		Re: IDLgrVolume By: David Fanning on Tue, 21 January 2003 12:32
		Re: IDLgrVolume By: Rick Towler on Tue, 21 January 2003 09:57
		Re: IDLgrVolume By: lyubo on Tue, 21 January 2003 10:44
		Re: IDLgrVolume By: David Fanning on Tue, 21 January 2003 06:47
		Re: IDLgrVolume By: s[1] on Tue, 21 January 2003 02:28

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