[vtkusers] vtkImageViewer2 / vtkImageActor (was Re: Sample code using VTK and DICOM)

[masabumi ishihara]

Hi Mathieu,

I'm sorry that I didn't realize the limitation of gdcmviewer.
I'd like to enlarge the limit size of the viewer we need.
So, please let me know how to do it, when you or OpenGL group member find
the solution.

Thanks,

Maty

2008/10/3 Mathieu Malaterre <mathieu.malaterre at gmail.com>

> 'lo
>
> On Fri, Oct 3, 2008 at 11:41 AM, masabumi ishihara
> <maty.ishihara at gmail.com> wrote:
> > Hi Mathieu,
> >
> > Thank you for your splendid opinion.
> > This time, we compareed two viewers' preformances.
> > Unfortunately, the results are as follows;
> >
> >                                                      CPU rate
> > performance of moving
> >   gdcmviewer with release mode          50~60%                slow
> >   our prototype viewer                         50~60%              real
> time
> >
> >   DICOM Data : LittleEndianExplicit  15,000 KB
>
> hum... for a 2D slice ? This is not that small after all. Maybe you
> are suffering from the non-power of two issue in OpenGL + texture.
>
> What is the size of the image (it is printed in the output of
> gdcmviewer). Something like:
>
> ...
>  Bounds:
>    Xmin,Xmax: (0, 347.85)
>    Ymin,Ymax: (424.05, 848.1)
>    Zmin,Zmax: (0, 0)
>  Compute Time: 0
>  ScalarType: 5
>  NumberOfScalarComponents: 1
>  Spacing: (0.15, 0.15, 1)
>  Origin: (0, 424.05, 0)
>  Dimensions: (2320, 2828, 1)
>  Increments: (0, 0, 0)
>  Extent: (0, 2319, 0, 2827, 0, 0)
> ...
>
> > Can you believe the above results?
> > Do you have any reason, e.g. memory sled ..., ?
> > Our prototype viewer is simple 2D viewer, which doesn't have any
> interface
> > to VTK, ITK GDCM.
> > Then, we would like to use the other viewer for the future.
> > But, it have to be real time operative.
>
> Because this is not my area of knowledge, I'll have to ask other
> people if there is anything to do to speed things up. Maybe some
> OpenGL guru will answer...
>
> BFN
> --
> Mathieu
>
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