[Insight-users] 2D slice from 3D image?

[Rao Jianguo]

Hi Luis,

Many thanks. I will have a try according to your guidance.

Cheers,

Jianguo

Luis Ibanez wrote:

> Hi Jianguo,
>
> The example ImageReadExtractWrite in
>
>        Insight/Examples/IO
>
> is defining the image with pixel types
>
> line 78:
> >
> >   typedef signed short        InputPixelType;
> >   typedef signed short        OutputPixelType;
> >
> >   typedef itk::Image< InputPixelType,  3 >    InputImageType;
> >   typedef itk::Image< OutputPixelType, 2 >    OutputImageType;
>
> Did you changed the OutputPixelType before running
> this program  ?
>
> The PNG image file format only manages "unsigned char"
> and "unsigned short" pixel types. If you change the output
> pixel type to anything different from those types, then
> you will have to select a file format different from PNG
> for storing your image. Possible options are:
>
>          MetaImage, Analyze, Gipl, VTK....
>
> If you really want to use PNG, then you could do casting
> before writing the image to a file, as illustrated in the
> example ImageReadCastWrite.cxx in the same directory.
>
> Both examples are described in the SoftwareGuide
>
>     http://www . itk . org/ItkSoftwareGuide . pdf
>
> Section 7.3, pdf-page 224, paper page 198.
>
> Regards,
>
>    Luis
>
> ------------------
> Rao Jianguo wrote:
> > Hello everyone,
> >
> > I am going to extract a 2D slice from 3D image.
> > As there is already a command to do this, I simply
> > run it:
> >
> > ./ImageReadExtractWrite myImage.mha test.png 0
> >
> > I got error message:
> >
> > =========
> > ../Insight/Code/Io/itkPNGImageIO.cxx line: 502
> > Description:  itk::ERROR: PNGImageIO(0x808a570):
> > PNG supports unsigned char and unsigned short
> >
> > =========
> >
> > I will be very grateful if someone can help.
> >
> > Cheers,
> >
> > Jianguo
> >
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> >
>
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