[vtkusers] Re versing Color

[David Doria]

On Fri, Jan 22, 2010 at 10:53 AM, KS Jothybasu <jothybasu at gmail.com> wrote:

> Sure by the way I had converter 2 of the c++ examples to python how to add
> that to wiki?
>
> Slowly ,down the line I will convert all the c++ to python!
>
> Thanks
>
> Jothy
>
>
> On Fri, Jan 22, 2010 at 3:46 PM, David Doria <daviddoria+vtk at gmail.com<daviddoria%2Bvtk at gmail.com>
> > wrote:
>
>> On Fri, Jan 22, 2010 at 10:42 AM, circass <circass at gmail.com> wrote:
>>
>>>
>>> I Gonna try to implement that to my code.
>>> Thanx,
>>> Circass
>>>
>>>
>>> KS Jothybasu wrote:
>>> >
>>> > In vtkLookupTable. Are you using vtkLookupTable if not here is a part
>>> of
>>> > the
>>> > code which might help you.
>>> >
>>> > * # Create a greyscale lookup table
>>> >     table = vtk.vtkLookupTable()
>>> >     table.SetRange(grayscale) # image intensity range
>>> >     table.SetValueRange(1,0) # from black to white
>>> >     table.SetSaturationRange(0.0, 0.0) # no color saturation
>>> >     table.SetRampToSCurve()
>>> >     table.SetNumberOfTableValues(402)
>>> >     table.Build()
>>> >
>>> >     # Map the image through the lookup table
>>> >     color = vtk.vtkImageMapToColors()
>>> >     color.SetLookupTable(table)
>>> >     color.SetInputConnection(reslice.GetOutputPort())
>>> >
>>> >     # Display the image
>>> >     actor = vtk.vtkImageActor()
>>> >     actor.SetInput(color.GetOutput())
>>> > *
>>> > Jothy
>>> >
>>> > On Fri, Jan 22, 2010 at 3:36 PM, circass <circass at gmail.com> wrote:
>>> >
>>> >>
>>> >> Where should i use that function ?
>>> >> is there a specific filter or what ?
>>> >>
>>> >> Thanx
>>> >> Circass
>>> >>
>>> >>
>>> >> KS Jothybasu wrote:
>>> >> >
>>> >> > Could you please try SetValueRange(1,0).
>>> >> >
>>> >> > Regards
>>> >> >
>>> >> > Jothy
>>> >> >
>>> >> > On Fri, Jan 22, 2010 at 2:06 PM, circass <circass at gmail.com> wrote:
>>> >> >
>>> >> >>
>>> >> >> I think Alessandro understood me wrong, so i m trying to explain
>>> what
>>> >> i
>>> >> >> want
>>> >> >> more clearly.
>>> >> >>
>>> >> >> I have dicom files that i read with itk and vtk.
>>> >> >>
>>> >> >> my images are already greyscale, i want to change the blacks with
>>> >> whites
>>> >> >> and
>>> >> >> vice versa.
>>> >> >>
>>> >> >> Thanx.
>>> >> >> Circass
>>> >> >> --
>>> >> >> View this message in context:
>>> >> >> http://old.nabble.com/Reversing-Color-tp27272638p27273652.html
>>> >> >> Sent from the VTK - Users mailing list archive at Nabble.com.
>>> >> >>
>>> >> >> _______________________________________________
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>>> >> >
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>>> >> >
>>> >> > Visit other Kitware open-source projects at
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>>> >>
>>> >> --
>>> >> View this message in context:
>>> >> http://old.nabble.com/Reversing-Color-tp27272638p27275052.html
>>> >> Sent from the VTK - Users mailing list archive at Nabble.com.
>>> >>
>>> >> _______________________________________________
>>> >> Powered by www.kitware.com
>>> >>
>>> >> Visit other Kitware open-source projects at
>>> >> http://www.kitware.com/opensource/opensource.html
>>> >>
>>> >> Please keep messages on-topic and check the VTK FAQ at:
>>> >> http://www.vtk.org/Wiki/VTK_FAQ
>>> >>
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>>> >>
>>> >
>>> > _______________________________________________
>>> > Powered by www.kitware.com
>>> >
>>> > Visit other Kitware open-source projects at
>>> > http://www.kitware.com/opensource/opensource.html
>>> >
>>> > Please keep messages on-topic and check the VTK FAQ at:
>>> > http://www.vtk.org/Wiki/VTK_FAQ
>>> >
>>> > Follow this link to subscribe/unsubscribe:
>>>
>>>
>> Jothy,
>>
>> I don't see an example about vtkImageMapToColors on the wiki. Care to add
>> one :) ?
>>
>> Thanks,
>>
>> David
>>
>>
>>
Great, thanks! You'll need to do the following:

1) Create a login/user for the wiki (maybe you have already done this?)
2) Click [edit] in the section you want to add something to
3) Create a new page and a link to the new page by adding:
* [[VTK/Examples/NewPageName | What you want to display as the link]]
4) when you save these changes, there will now be a red link. When you click
this link, it immediately brings you to the "edit" page of the new page
5) add the content and save it
6) the link automatically turns blue (so it now goes to the "page" page
instead of the "edit" page)

Let me know if you have any problems - if you do, lets modify this set of
instructions so it is followable by a new wiki contributor and I'll add it
as a "how to contribute" section. Also, let me know when you do the first
one and I'll check it out for style, etc.

Thanks,

David
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