[Paraview] Recommendations for display of 4D color dataset

[Utkarsh Ayachit]

The contour filter doesn't pass the input scalars by default. Make
sure that "Compute Scalars" checkbox is checked.

Utkarsh

On Fri, Jun 17, 2011 at 4:28 AM, Richard Beare <richard.beare at gmail.com> wrote:
> This did work very nicely for volume rendering, but I didn't succeed
> with the contouring approach. I was not able to select colormaps for
> the second and third datasets.
>
> Any suggestions?
>
> On Wed, Jun 15, 2011 at 10:59 PM, Utkarsh Ayachit
> <utkarsh.ayachit at kitware.com> wrote:
>> 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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>>
>