[Paraview] Recommendations for display of 4D color dataset

[Utkarsh Ayachit]

You could very easily write a C++ filter to do the same or use the
Python programmable filter. Feel free to add a feature request to the
bug tracker (http://paraview.org/Bug) for this. Should be an easy
enough fix to address for the next release.

Utkarsh

On Mon, Jun 20, 2011 at 12:03 AM, Richard Beare <richard.beare at gmail.com> wrote:
> I thought I had done this, but I must have missed something. That
> seems to work now.
>
> Including the calculator seems to slow things down considerably when
> volume rendering a timeseries - is there another way of changing an
> array name?
>
> Thanks
>
> On Sat, Jun 18, 2011 at 6:11 AM, Utkarsh Ayachit
> <utkarsh.ayachit at kitware.com> wrote:
>> 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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>>
>