[Insight-users] Convert signed short to float in DICOM

[Goo]

In my program,
there are two difference type in pipeline.

At first,I am casting 'signed short' to 'float'.
Through the processing of gradient filter this float data
is casting to signed short.

The pipeline as below:
signed short data -->cast1 -->float data --> Filter --> float data -->
cast2 -->signed short data -->write to dicom

The result is full white.
I don't know what happen?
Can anybody give me some suggestion?

Regards

2007/3/27, Xavier Mellado Esteban <xavier.mellado at upf.edu>:
>
>
>    Hi Goo:
>
>    Write images in each step of your pipeline, before and after use each
> filter. And find exactly which is the problem an report here more
> information.
>
>    If you have problems with casting, there are filters for doing this,
> see ITK User Guide (http://www.itk.org/ItkSoftwareGuide.pdf) Chapter
> 6.3. Look at Geodesic Active Contours example (9.3.3) and
> GradientMagnitudeRecursiveGaussianImageFilter example (6.4.2), too.
>
>               I hope this helps you:
>                                                   Xavi
>
> Goo escribió:
> > Hi All:
> >
> > I currently use 'Geodesic Active Contour Level Set Mehtod' for image
> > segmentation.
> > My input is a DICOM 3D image and its type is signed short.
> > Because the demand for level set, this image must be casted to float.
> > However, after the execution of
> > GradientMagnitudeRecursiveGaussianImageFilter,
> > the output image is black.
> > After I checked in the entire process, I guess the reason is data type
> > error.
> > What means can be taken to resolve the matter?
> >
> > Regards.
> > ------------------------------------------------------------------------
> >
> > _______________________________________________
> > Insight-users mailing list
> > Insight-users at itk.org
> > http://www.itk.org/mailman/listinfo/insight-users
> >
>
>
> --
> ___________________________________
>
> Xavier Mellado Esteban
> Computational Imaging Lab
> Department of Technology - D. 328
> Pompeu Fabra University
> Pg. Circumval·lació 8
> 08003 Barcelona - Spain
>
> Phone: +34 93 542 1323
> E-mail: xavier.mellado at upf.edu
> Skype: xavier.mellado
>
>
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