[Insight-developers] BUG: GDCMImageIO should respect the rescale intersept/slope when writing data

[Bill Lorensen]

I understand now.

Thanks,

Bill

On Nov 29, 2007 8:48 AM, Mathieu Malaterre <mathieu.malaterre at gmail.com>
wrote:

> The reading behavior is not changing, whenever we find a rescale
> slope/interspect we take them into account. But as of now, when we are
> *writing* an image with a rescale slope/interspect we discard it (we
> were storing the pixel data buffer directly without affine transform).
> This used to work well, but for people willing to store floating point
> data this is an outstanding issue preventing them to store the image.
>
> -Mathieu
>
> On Nov 29, 2007 2:34 PM, Bill Lorensen <bill.lorensen at gmail.com> wrote:
> > Mathieu,
> >
> > Are you saying that we will no longer call RescaleFuntion in
> GDCMImageIO?
> > This would be a huge change and break everyone's applications I believe.
> > Maybe I am misunderstanding.
> >
> > Bill
> >
> >
> > On Nov 29, 2007 8:21 AM, Mathieu Malaterre <mathieu.malaterre at gmail.com>
> > wrote:
> >
> > >
> > >
> > >
> > > Hi,
> > >
> > >  Just FYI after discussing with Matthias, my previous fix in ITK for
> > > the rescale intersept/slope was clearly a hack and should be removed
> > > ASAP. The correct patch should be that ITK is consistant at write
> > > time, and respect the slope/intersept value as found in the metadata
> > > header.
> > >  What this means is, we will continue to not support floating point
> > > Image, but allow user to apply a shift/scale by hand to have total
> > > control over the data loss and then store the data as DICOM.
> > >  I should find some time in the next days to implement the correct
> patch.
> > >
> > > thanks,
> > > --
> > > Mathieu
> > > _______________________________________________
> > > Insight-developers mailing list
> > > Insight-developers at itk.org
> > > http://www.itk.org/mailman/listinfo/insight-developers
> > >
> >
> >
>
>
>
> --
> Mathieu
>
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