[Vv] Format for deformation fields in VV

[Simon Rit]

Please use the mailing list.
I am not sure but I believe it is the downsampling factor, i.e.,
display a vector every ten vectors in the vector field.
Simon

On Thu, Sep 19, 2013 at 4:39 PM, Bilal Tahir <b.tahir at sheffield.ac.uk> wrote:
> Dear Simon,
>
> There are 3 options for the deformation overlay field: subsampling, scale
> and width. I would like to know what units is the subsampling parameter in?
> I.e. If I set to 10 does it mean that it displays vectors for every 10mm or
> 10 voxels?
>
> Best wishes,
>
> Bilal
>
>
>
> ---------- Forwarded message ----------
> From: Simon Rit <simon.rit at creatis.insa-lyon.fr>
> Date: 18 September 2013 07:13
> Subject: Re: [Vv] Format for deformation fields in VV
> To: vv <vv at creatis.insa-lyon.fr>
>
>
> Hi Bilal,
> All the ITK formats should be accepted so if .nii.gz is readable ITK,
> it is readable by VV. It's not because the format is not listed from
> the gui that it cannot be read. Just give it a try from the command
> line, e.g., vv image.mha --vf vf.nii.gz
> The format is one file with the displacement vector at each point,
> i.e., itk::Image< itk::Vector<float, 3>, 3>. The vector is in mm and
> the location of the vector is given with the origin and spacing of the
> image, as usual in ITK.
> Simon
>
> On Tue, Sep 17, 2013 at 7:38 PM, Bilal Tahir <b.tahir at sheffield.ac.uk>
> wrote:
>> Dear VV community,
>>
>> I would like to visualize the deformation fields from image registration.
>> I
>> have been experimenting with ANTS registration which outputs warped and
>> inverse deformation fields in .nii.gz format but I noticed that .nii.gz
>> format was not among the list of supported formats - only the .nii format.
>>
>> In addition, I would like to know if VV requires a specific format to view
>> the deformation fields? I.e. does it need the X,Y,Z images in one file or
>> as
>> 3 separate images? In addition does it have any requirements on the
>> intensity values of the X, Y, Z images in terms of coordinate systems?
>>
>> Best wishes,
>>
>> Bilal Tahir,
>> James Morrison Researcher in Radiotherapy Imaging,
>> Department of Clinical Oncology,
>> University of Sheffield
>>
>> _______________________________________________
>> vv mailing list
>> vv at creatis.insa-lyon.fr
>> http://www.creatis.insa-lyon.fr/mailman/listinfo/vv
>>
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>
>
> --
> Bilal Tahir,
> James Morrison Researcher in Radiotherapy Imaging,
> Department of Clinical Oncology,
> University of Sheffield