[vtk-developers] A new way to look at images

[Dean Inglis]

Hi David,

truly amazing! Very easy to scroll or oblique slice.  I couldnt see
the colored background in the renderer: it seems like the new vtkImage/Mapper
takes up the whole viewport?  It would be nice to have a reset in the interactor style
to reposition the image slice along one of the orthogonal data axes of a 3D image,
but this should be easy to do with a callback.
Attached is the tcl version for anyone who wants it.  

Dean
  ----- Original Message ----- 
  From: Will Schroeder 
  To: David Gobbi 
  Cc: VTK Developers 
  Sent: Saturday, January 22, 2011 9:32 AM
  Subject: Re: [vtk-developers] A new way to look at images


  David this is very clever and seems pretty intuitive to use (I did not actually try it).


  I think my initial (minor) concern is naming, while I think what you've come up is pretty good I can see how a novice might get confused.  Did you consider something like "ImageResliceActor", "ResliceActor" or simply "Reslice"?


  W






  On Fri, Jan 21, 2011 at 6:53 PM, David Gobbi <david.gobbi at gmail.com> wrote:

    Hi All,

    I've been experimenting with a new way of rendering 3D images in VTK.
    So far, it is working fairly well.  Here is a rough description of the
    new VTK classes I've written:

    vtkImage - a new prop for image viewing, analogous to vtkVolume and vtkActor
    vtkImageProperty - holds the lookup table, window/level, etc.
    vtkImageMapper3D - a new mapper that does image reslicing and texturing

    Using these classes is very simple: just set up the camera, and the
    vtkImage object will automatically display the slice at the camera
    focal point.  To show a different slice, just move the focal point so
    that it lies at a different position in the 3D image.  To slice in a
    different orientation, rotate the camera around the focal point.  In
    other words, the slicing is completely controlled by the camera.  This
    makes everything work nicely with the VTK interactors, and also
    simplifies the intermixing of images and geometry.

    My reason for making this class is that I've seen plenty of users on
    the list who struggle with vtkImageReslice and with vtkImageViewer.  I
    wanted to make it as easy to view an image in VTK as it is to view an
    actor. I have the code on my github account
    git://github.com/dgobbi/VTK.git in the branch "image-prop"
    http://github.com/dgobbi/VTK/tree/image-prop

    The code includes a modified vtkInteractorStyleImage class that has
    new interactions for rotating the camera with shift-leftbutton (for
    oblique slicing) and for adjusting the focal point with
    shift-middlebutton (for slicing through the image).  There is also a
    python example in Examples/ImageProcessing/Python/ImageMapper3D.py.
    All of this is still preliminary development, but so far I haven't
    encountered any show-stopping bugs.

    Please let me know what you think.  I'll try to make a wiki page with
    more details next week.

     - David
    _______________________________________________
    Powered by www.kitware.com

    Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html

    Follow this link to subscribe/unsubscribe:
    http://www.vtk.org/mailman/listinfo/vtk-developers





  -- 
  William J. Schroeder, PhD
  Kitware, Inc.
  28 Corporate Drive
  Clifton Park, NY 12065
  will.schroeder at kitware.com
  http://www.kitware.com
  (518) 881-4902



------------------------------------------------------------------------------


  _______________________________________________
  Powered by www.kitware.com

  Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html

  Follow this link to subscribe/unsubscribe:
  http://www.vtk.org/mailman/listinfo/vtk-developers

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://public.kitware.com/pipermail/vtk-developers/attachments/20110122/df8c9e0b/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: ImageMapper3D.tcl
Type: application/octet-stream
Size: 1120 bytes
Desc: not available
URL: <http://public.kitware.com/pipermail/vtk-developers/attachments/20110122/df8c9e0b/attachment-0001.obj>