Re: problem with volume display

• To: cchen@xxxxxxxxxx
• Subject: Re: problem with volume display
• From: Curtis Rueden <curtis@xxxxxxxxxxxxx>
• Date: Thu, 03 Oct 2002 20:14:24 -0500

Hi Tim,

Volume rendering looks best at a cubic resolution between
32 x 32 x 32 and 128 x 128 x 128 (I wouldn't go larger than
that because it starts eating a prohibitive amount of memory).

If your cube is sparse (say, 4 x 4 x 4), I'd resample it to
a higher resolution and redisplay it.  More memory will be
used, but the display will look better.

-Curtis

At 11:44 AM 10/3/2002, Chien-Ting Chen wrote:
>Hi,
>
>I have been using Display.RGBA map (value) with Linear3DSet (x,y,z) to
>render a volume data ((x,y,z)->(value)), the higher the value, the lower the
>transparency
>with a pre-defined high color.
>because the volume is pretty big so I make a divide the volume to be a set
>of unit cube and interpolate their values by given samples.
>
>My problem is when the cube partition is not dense, the volume display looks
>like a set of "crossed-rectangles" for 3 sides(xy-plane, yz-plane, and
>xz-plane) instead of
>a solid cube. When I rotated the display, in some angle, there are some
>"missing" faces in a unit cube so it looks like a set of flat rectangles.
>
>Does anyone know how to fix it?
>Thanks,
>
>Tim

• References:
  • problem with volume display
    • From: Chien-Ting Chen