[vtkusers] Creating a slice of an ImageData

[Jefferson Thomas]

Thank you Amy and Sajendra N. I implemented vtkImageReslice and it is
exactly what I wanted. The important clue is the ImageSlicing.cxx
example and setting the output of vtkImageMapToColors to the
vtkJPEGWriter.
Sorry for mailing you directly the last time. I didnt check the
address after clicking 'Reply'.
Thomas

2008/5/23 Amy Squillacote <ahs at cfdrc.com>:
> Hi Thomas,
>
> I am copying my response back to the vtkusers list. Please keep the
> discussion on the vtkusers list rather than emailing me directly. That way
> other people on the list can contribute to the discussion, and the
> conversation will be archived.
>
> Because the output of vtkCutter is vtkPolyData, there is not an easy way to
> write it to an image file without rendering first. If you instead use
> vtkImageReslice (as suggested by Sajendra N, who also responded to you on
> the vtkusers list), then the output is vtkImageData, which can much more
> easily be passed to an image writer without rendering. The example Sajendra
> N mentioned is in VTK/Examples/ImageProcessing, and it demonstrates taking a
> slice from a vtkImageData. The on-line help for vtkImageReslice is here:
> http://www.vtk.org/doc/nightly/html/classvtkImageReslice.html.
>
> - Amy
>
> Jefferson Thomas wrote:
>>
>> Thank you. It works.
>> By the way, is there any smart way to output the resulting slice into
>> an image file, like JPG or PNG ? And without using any rendering, just
>> direct array-writing. I have been trying vtkJPEGWriter but I can not
>> figure out a good way to transfer the values from the data table into
>> the vtkJPEGWriter. Nor can I find any example for it on the internet.
>> How should I do it ?
>> Thomas
>>
>> Thomas
>>
>> 2008/5/22 Amy Squillacote <ahs at cfdrc.com>:
>>
>>>
>>> Hi Thomas,
>>>
>>> Try using vtkCutter
>>> (http://www.vtk.org/doc/nightly/html/classvtkCutter.html) with a vtkPlane
>>> (a
>>> subclass of vtkImplicitFunction).
>>>
>>> - Amy
>>>
>>> Jefferson Thomas wrote:
>>>
>>>>
>>>> Hi,
>>>> How to create a slice from a 3D ImageData ? Ive been doing it with
>>>> vtkImageDataGeometryFilter with SetExtent but in this way it is only
>>>> possible to make a slice parallel to xy, xz or yz plane. I cant figure
>>>> out a way to get a diagonal slice.
>>>> Is there any smart way to create a slice for any arbitrary surface ?
>>>> Thank you for any help,
>>>> Thomas
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>>>>
>>>>
>>>
>>> --
>>> Amy Squillacote                    Phone: (256) 726-4839
>>> Computer Scientist                 Fax: (256) 726-4806
>>> CFD Research Corporation           Web: http://www.cfdrc.com
>>> 215 Wynn Drive, Suite 501
>>> Huntsville, AL  35805
>>>
>>>
>>>
>>>
>>
>>
>>
>
> --
> Amy Squillacote                    Phone: (256) 726-4839
> Computer Scientist                 Fax: (256) 726-4806
> CFD Research Corporation           Web: http://www.cfdrc.com
> 215 Wynn Drive, Suite 501
> Huntsville, AL  35805
>
>
>