Thank you for the suggestion.
The reason for needing rotated data is that we have one application that
handles images from magnetic resonance cameras, these images come in the
form of 3d (and time resolved) volumes and 2d planes. We also have another
application (based on paraview) that is used to display these types of
images and do things such things as create streamline visualizations with
them.
The problem then is to get data from one application to the other,
preferably in a format that supports volume rendering in paraview.
Currently it appears that we will need to set a limit on one volume for
export and then reorient every 2d imageplane object to that volumes
orientation. This way we can get everything in the right position and also
get volume rendering of the volume data. But it is a bit less then pretty.
The idea of using state files is interesting, thank you for suggesting it,
I shall give it consideration. I have previously looked at the orientation
attribute and it appears to be locked to a 3d view, add the object to
another 3d view and the orientation is reset, this would be quite bad. But
perhaps I have just misunderstood it.
BR/ Christoffer
On Fri, Apr 13, 2012 at 3:26 PM, Cory Quammen cquam...@cs.unc.edu wrote:
Christopher,
You didn't say exactly what you want to do with such rotated data, so
I'll make a leap and assume you just want to display it in ParaView.
If that's the case, then within ParaView, you can set a transform on a
data object by selecting the object in the pipeline browser, selecting
the Display tab, and scrolling down to the bottom until you see the
Transformation section. Here you can apply a rotation by changing the
orientation.
You can define this rotation in an XML state file that you can then
import into ParaView. To generate an example, try loading an image in
ParaView, applying a transformation, selecting File-Save State, and
then examine the contents of the state file. Look for a Property
element with a name attribute Orientation.
Hope that helps,
Cory
On Fri, Apr 13, 2012 at 5:18 AM, Christoffer Green
christoffer.gr...@gmail.com wrote:
Thank you for the reply.
Interesting, I had not realized that vtk cannot handle rotated image data
(without conversion/interpolation), that explains why there are no such
properties in the xml file.
Well, that throws quite the wrench in my plans, but thanks for letting me
know :)
BR/ Christoffer
On Thu, Apr 12, 2012 at 3:53 PM, David E DeMarle
dave.dema...@kitware.com
wrote:
No, vtk's image data is defined to be axis aligned.
You have to apply filters to transform them (and change type to
structuredgrid in the process), so the image data file formats are not
the place to specify the transformation you want.
David E DeMarle
Kitware, Inc.
RD Engineer
21 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-881-4909
On Wed, Apr 11, 2012 at 12:54 PM, Christoffer Green
christoffer.gr...@gmail.com wrote:
My question was if it is possible to define this within the xml file
itself.
Thanks.
BR/ Christoffer
On Wed, Apr 11, 2012 at 4:20 PM, Jothybasu Selvaraj
jothyb...@gmail.com
wrote:
Using vtkImageReslice you could rotate the vtkImageData.
You need to create a vtkMatrix4x4 for the rotation nad pass this
matrix
to
vtkImageReslice::
SetReSliceAxes
Jothy
On Wed, Apr 11, 2012 at 3:17 PM, Jothybasu Selvaraj
jothyb...@gmail.com
wrote:
Using vtkImageReslice you could rotate the vtkImageData?
You need to create a vtkMatrix4x4 for the rotation nad pass this
matrix
to vtkImageReslice::SetReSliceAxes
Jothy
On Wed, Apr 11, 2012 at 3:10 PM, Christoffer Green
christoffer.gr...@gmail.com wrote:
Hello!
I have been trying to figure out if it is possible to rotate data
directly from a imagedata xml file. Can anyone lend me a hand on
how
to do
that?
I am currently exporting data from matlab to a .vti imagedata xml
file
and importing it to paraview (that is I am writing the file without
using
vtk classes) but I
do not know how to rotate the data. According to
the www.vtk.org/VTK/img/file-formats.pdf file there is a
Coordinate
tag
but it does not appear to have an effect when importing, but on the
other hand its barely documented and I am really just guessing on
how
to use
it.
Currently I am testing with this data (but my actual data is much
larger):
?xml version=1.0?
VTKFile type=ImageData version=0.1 byte_order=LittleEndian
ImageData WholeExtent=0 1 0 1 0 0 Origin=0.0 0.0 0.0
Spacing=0.4
0.4 0.4
Piece Extent=0 1 0 1 0 0
Coordinates
DataArray type=Float32 Name=x_coordinate format=ascii0.0
0.3
0.0/DataArray
DataArray type=Float32 Name=y_coordinate format=ascii0.5
0.2
0.0/DataArray
DataArray type=Float32 Name=z_coordinate format=ascii1.0
0.0
