[Paraview] Recommendations for display of 4D color dataset

[Utkarsh Ayachit]

ParaView associates color maps with array-names, so all arrays with
the same name use the same color map. An easiest way around this is to
apply the "Calculator" filter to each of the mha file readers set the
expression to the name of the input array while change the "Result
Array Name" for every instance of the calculator to be something
unique. Now you can color the results produced by each of the
calculators differently using different colormaps.

Utkarsh

On Wed, Jun 15, 2011 at 1:02 AM, Richard Beare <richard.beare at gmail.com> wrote:
> Hi,
> I'm investigating methods for display of a 4D microscopy dataset. I'd
> like to be able to reproduce the style of display provided by Imaris,
> however I'm not entirely sure how Imaris does it. It may be volume
> rendering or a clever surface rendering.
>
> The data is from a confocal microscope and has 3 fluorescent channels.
> I can convert the data to many forms - at present I have it as 3
> channel mha and 3 individual mha files.
>
> The things I've tried are 1) volume rendering each channel
> independently and applying a red, green or blue colormap. However I
> don't seem to be able to set a different colormap for each volume. 2)
> using the contour filter to create several contours for each channel
> and colour the result. If I use a solid color for each channel and
> play with opacity I can get interesting results. However I'd like to
> be able to colour according to underlying brightness. I have the same
> trouble with colourmaps in this approach as I do for the volume
> rendering - I am only able to set one colourmap. A temporary option is
> to use the colourmap for the most important channel and use solid
> colors for the others.
>
> Is anyone able to recommend a better way?
>
> Thanks
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