[MINC-users] mincreshape -dimsize

[Robert D. Vincent]

OK, I have a fix for the most serious issue which triggered the bizarre
HDF5 error messages. This in turn causes the image scaling to be wrong, and
led to the inability of Register or Display to load the file properly.

I'm not happy with the behavior of the program in this case even so.
Changing dimension sizes does change the FOV in ways that are fairly
surprising. I assume this is because mincreshape is limited in the ways it
can resample the data, but I would still like to see it act in a more
predictable fashion.

My advice in these situations is often "please use mincresample".

    -bert

On Mon, Sep 21, 2015 at 6:59 PM, Andrew Janke <a.janke at gmail.com> wrote:

> On 22 September 2015 at 01:41, Robert D. Vincent
> <robert.d.vincent at mcgill.ca> wrote:
> > Historically, I believe mincreshape really was only meant to resize the
> two
> > fastest-varying dimensions (xspace and yspace in this case), at least
> > according to the man page.
>
> Correct, the original reason was due to slice scaling IIRC. If Peter
> is still lurking he'll know the answer.
>
> > However, I'm not sure whether there was some
> > attempt over the years to make it more flexible, but evidently it is
> > failing pretty clumsily. It certainly shouldn't issue the errors you are
> > seeing. I'll look into it.
>
> There was talk of it but it never happened. As it turns out I even
> confused myself and told Soren the wrong thing the correct workaround
> is this (to treat in this case zspace as an image dimension):
>
>    -dimsize zspace=-1
>
> It means most of my analysis starts with an incantation such as this
> to make everything +ve steps, MINC2 and the same dimension order:
>
>    mincreshape -2 \
>       +direction \
>       -dimorder zspace,yspace,xspace \
>       -dimsize xspace=-1 \
>       -dimsize yspace=-1 \
>       -dimsize zspace=-1 \
>       in.mnc out.mnc
>
> As you rightly point out, this is not all that amenable to new users!
>
>
> a
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