I have some 16-bit unsigned X-ray CT data. I have taken a slice through the data at odd orientations using "map to plane." I have been trying to look at some of the finer features but they appear to have an "anti-aliased" margin on them. I tested this by making a colour map with only two colours (red and blue) and the red spots in the blue background had a halo of something in between. I want to know how big my red dots are, and I am not sure where to take the edges. All I can figure is that it is some kind of dithering effect in the rendering, or that it is something to do with assigning the 256-colours and dithering to 16-bit data.
Can I turn dithering off? I can't use delayed colours because the data is 16-bit and I don't really want to drop the data resolution, but if this has worked for someone out there then I might try. I am using software rendering on an SGI Origin 3800, hardware is not an option. I have access to a Sunblade with hardware rendering if that is a solution. Any suggestions? Cameron Huddlestone-Holmes School of Earth Sciences, James Cook University, Townsville, Queensland. 4811. Australia. [EMAIL PROTECTED] +61 7 4781 4884 --
