[vtkusers] Turning off/on voxels at the intersection of two vtkimagedata

[David E DeMarle]

TransformFilter changes the data type because vtkImageData has a
fundamental limitation of being defined as being axis aligned.

David E DeMarle
Kitware, Inc.
Principal Engineer


On Wed, Jan 9, 2019 at 3:50 PM shadab anwar <sk.shadabanwar at gmail.com>
wrote:

> Hey Andras,
> Thank You for the quick reply!
>
> My application is based on CAD and Machining Dynamics.
> Also I would like to know the process for translating the vtkimagedata so
> that I can see the tool moving visually to the next position. I have tried
> vtkimagereslice and vtktransformfilter. The problem with vtkimagereslice is
> that if I rotate the model I get a truncated solid. When I use
> vtktransformfilter I get the output as vtkstructuredgrid instead of
> vtkimagedata.
> I'll be happy if you can show me a direction such that I will be able to
> translate, rotate my imagedata (not the actor).
>
> Just to let you know I am using C++.
>
> Thanks,
> Shadab
>
>
>
>
> On Wed, 9 Jan 2019 at 3:10 PM, Andras Lasso <lasso at queensu.ca> wrote:
>
>> You can do the single step of blanking out an image data with another by
>> resampling the two images in the same coordinate system and use
>> vtkImageMask or vtkImageMath to combine them.
>>
>>
>>
>> If you wanted to simulate medical procedures (bone removal, etc.) note
>> that a full suite of tools are available for this in 3D Slicer application (
>> www.slicer.org) and its many extensions. They are based on VTK and fully
>> customizable or extensible in Python and C++. You can connect to almost any
>> position tracker device (it can be a simple webcam that tracks 2D barcodes,
>> or a commercial surgical navigation system) using SlicerIGT extension (
>> www.slicerigt.org) to get tool position in real-time. To remove tissue
>> probably the simplest is to import the tool model as a segment and apply
>> “volume masking” segment editor effect. You can even compute skill
>> assessment metrics using PerkTutor extension (www.perktutor.org). All
>> the programming that you need to do is writing 20-30 lines of Python code
>> to trigger volume masking automatically when the tool position is changed.
>> If you have any questions you can post it to https://discourse.slicer.org.
>>
>>
>>
>>
>> Andras
>>
>>
>>
>> *From:* vtkusers <vtkusers-bounces at vtk.org> *On Behalf Of *shadab anwar
>> *Sent:* Wednesday, January 9, 2019 2:31 PM
>> *To:* vtkusers at public.kitware.com; vtkusers at vtk.org
>> *Subject:* [vtkusers] Turning off/on voxels at the intersection of two
>> vtkimagedata
>>
>>
>>
>> Hi everyone,
>>
>>
>>
>> I am working on a problem consisting of two vtkimagedata, where the first
>> vtkimagedata represents workpiece (3D block) and other vtkimagedata
>> represents  tool (cylindrical) in my application.
>>
>> I want to turn off the voxels at the intersection of these two imagedata
>> after that  I want to translate the tool to a next position and repeat the
>> same thing.
>>
>>
>>
>> I have tried few methods but no sucess! I'll be really grateful if you
>> can help me with the easiest method to do so or at least show me direction
>> to go.
>>
>>
>>
>> Thanks,
>>
>> Shadab
>>
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