[vtkusers] Writing a JPEG from vtkActor

[Dominik Szczerba]

> I tested your code with my data and I got two diminished spots (more
> or less what I already have). So I tried to change the SetScale in
> vtkImageShiftScale and I got what I want, obviously without any
> mathematic. I'll examine more this function, but I think this could be
> the way. Try this:
> 
> iss-->SetScale((range[1] - range[0]) / range[1]);
> 

doesnt help, I think the problem is elsewhere.
Dominik


> Marlos
> 
> On 12/20/05, Dominik Szczerba <domi at vision.ee.ethz.ch> wrote:
> 
>>>I got an error in compilation. I can't figure out how to make the
>>>conversion, because if I'm going to write directly the
>>>vtkStructuredPoints data to the file, I'm going to get only a
>>>grayscale image.
>>
>>could you pls post your code? i would be glad even with grayscale (get a
>>black image). Anyway, I have not been succesful with custom color tables
>>in vtk at all.
>>
>>bye
>>--dsz
>>
>>
>>>
>>>>I try to do the same with vtkPNGWriter (...)
>>>
>>>When I used directly the vtkJPEGWriter, I needed to use the
>>>vtkImageShiftScale class to compile, but I got a black image.
>>>
>>>Marlos Fabris
>>>IT Analyst
>>>Institute of Technology for Development
>>>Curitiba - Paraná - Brazil
>>>
>>>On 12/20/05, Dominik Szczerba wrote:
>>>
>>>
>>>>What is the error? I try to do the same with vtkPNGWriter ending up with:
>>>>
>>>>vtkPNGWriter (0x8058948): PNGWriter only supports unsigned char and
>>>>unsigned short inputs
>>>>
>>>>Meanwhile I try to figure out how to do the appropriate convertion in vtk.
>>>>--dsz
>>>>
>>>>Marlos Fabris wrote:
>>>>
>>>>
>>>>>Hi,
>>>>>
>>>>>I'm trying to write a jpeg file (using vtkJPEGWriter) from a vtkActor
>>>>>but I can't accomplish this. I have a vtk file with structured points
>>>>>data and I wish to transform to vtkPolyData and color it with my
>>>>>vtkLookupTable.
>>>>>
>>>>>Is there a way to convert only my vtkActor to a vtkImageData, without
>>>>>the frameborders of vtkWindowToImageFilter?
>>>>>
>>>>>Or is there a way to trim my image?
>>>>>
>>>>>Thank you in advance,
>>>>>
>>>>>Marlos Fabris
>>>>>_______________________________________________
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>>>>
>>>>--
>>>>Dominik Szczerba, Dr.
>>>>ETZ C110 CO-ME/BIWI CH-8092 Zurich
>>>>http://www.vision.ee.ethz.ch/~domi
>>>>_______________________________________________
>>>>This is the private VTK discussion list.
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>>>>
>>>
>>>_______________________________________________
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>>
>>--
>>Dominik Szczerba, Dr.
>>ETZ C110 CO-ME/BIWI CH-8092 Zurich
>>http://www.vision.ee.ethz.ch/~domi
>>_______________________________________________
>>This is the private VTK discussion list.
>>Please keep messages on-topic. Check the FAQ at: http://www.vtk.org/Wiki/VTK_FAQ
>>Follow this link to subscribe/unsubscribe:
>>http://www.vtk.org/mailman/listinfo/vtkusers
>>
> 
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-- 
Dominik Szczerba, Dr.
ETZ C110 CO-ME/BIWI CH-8092 Zurich
http://www.vision.ee.ethz.ch/~domi