[vtkusers] vtkImageViewer's

[Mathieu Malaterre]

Q2 & 3 are much harder. AFAIK there is always an hardcoded limit to
the number of OpenGL context you can create. So you can try on your
side, and try to create multiple vtkRenderWindow and check when this
will start failing.

Last time I played with it, it would start failing around 450 contexts:
http://wxvtk.cvs.sourceforge.net/viewvc/wxvtk/wxVTK/Sample/wxVTKNotebook.cxx?view=log

If you ever plan to swap two imageviewer, you should look at the
SetDisplayId / SetWindowId to quickly exchange two views.

HTH

On Sat, Nov 28, 2009 at 2:17 PM, Lic. José M. Rodriguez Bacallao
<jmrbcu at gmail.com> wrote:
> thanks, and what about questions 2 and 3?
>
> On 11/28/09, Mathieu Malaterre <mathieu.malaterre at gmail.com> wrote:
>> May I suggest you reread the FAQ:
>> http://catb.org/~esr/faqs/smart-questions.html#prune
>>
>> Thanks.
>>
>> As for your question vtkImageViewer and vtkImageViewer2 from a user
>> point of view are very different object. vtkImageViewer will display
>> 2D images (glDrawPixels), while vtkImageViewer2 will display texture.
>> There basically no reason to use vtkImageViewer IMHO, since texture on
>> any hardware accelerate card will be just as fast (if not faster) as
>> glDrawPixels.
>>
>> In GDCM, I chose to use vtkImageViewer2, since vtkImageViewer would
>> not handle Spacing of my images. However there is a slight issue with
>> Window Level implementation in vtkImageViewer2, so I had to create
>> this vtkImageColorViewer. I believe there is post in vtk-dev which
>> explains why I could not directly 'fix' vtkImageViewer2.
>>
>> HTH
>>
>> On Fri, Nov 27, 2009 at 8:05 PM, Lic. José M. Rodriguez Bacallao
>> <jmrbcu at gmail.com> wrote:
>>> no one?
>>>
>>> On 11/27/09, Lic. José M. Rodriguez Bacallao <jmrbcu at gmail.com> wrote:
>>>> hi folks, I got a few questions:
>>>>
>>>> 1- What is the difference between vtkImageViewer, vtkImageViewer2 and
>>>> from gdcm, vtkImageColorViewer?
>>>>
>>>> 2- If I have N vtkGDCMImageReader's and one ImageViewer (from those
>>>> above), how do I dynamically swap the actual viewed image in the
>>>> viewer from one of the readers to another?
>>>>
>>>> 3- If I need to show multiples DICOM image series, which is the best
>>>> way to do it (I am thinking about the resource consumption), several
>>>> ImageViewer's for each reader or one ImageViewer and dynamically
>>>> change his input?
>>>>
>>>> PS: I am using python, pyqt4 and gdcm.
>>>>
>>>> --
>>>> Lic. José M. Rodriguez Bacallao
>>>> Centro de Biofisica Medica
>>>> -----------------------------------------------------------------
>>>> Todos somos muy ignorantes, lo que ocurre es que no todos ignoramos lo
>>>> mismo.
>>>>
>>>> Recuerda: El arca de Noe fue construida por aficionados, el titanic
>>>> por profesionales
>>>> -----------------------------------------------------------------
>>>>
>>>
>>>
>>> --
>>> Lic. José M. Rodriguez Bacallao
>>> Centro de Biofisica Medica
>>> -----------------------------------------------------------------
>>> Todos somos muy ignorantes, lo que ocurre es que no todos ignoramos lo
>>> mismo.
>>>
>>> Recuerda: El arca de Noe fue construida por aficionados, el titanic
>>> por profesionales
>>> -----------------------------------------------------------------
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>>
>>
>>
>> --
>> Mathieu
>>
>
>
> --
> Lic. José M. Rodriguez Bacallao
> Centro de Biofisica Medica
> -----------------------------------------------------------------
> Todos somos muy ignorantes, lo que ocurre es que no todos ignoramos lo mismo.
>
> Recuerda: El arca de Noe fue construida por aficionados, el titanic
> por profesionales
> -----------------------------------------------------------------
>



-- 
Mathieu