1. ITKv4 – Spatial Objects Arnaud Gelas – Luis Ibanez

2. Beyond the Image...

3. So far...
FILTER
Input
Image
Output
Image

4. Only Recently...
FILTER
Input
Mesh
Output
Mesh

5. The Future...
Input
Image
Mesh
TimeSequence
...
FILTER
Objects ?

6. Spatial Objects itkArrowSpatialObject itkLineSpatialObject
itkBlobSpatialObject
itkBoxSpatialObject
itkContourSpatialObject
itkCylinderSpatialObjec t
itkDTITubeSpatialObject
itkEllipseSpatialObject
itkGaussianSpatialObje ct
itkGroupSpatialObject
itkImageMaskSpatialOb ject
itkImageSpatialObject
itkLandmarkSpatialObj ect
itkLineSpatialObject
itkMeshSpatialObject
itkPlaneSpatialObject
itkPointBasedSpatialObj ect
itkPolygonGroupSpatial Object
itkPolygonSpatialObject
itkSceneSpatialObject
itkSpatialObject
itkSurfaceSpatialObject
itkTubeSpatialObject
itkVesselTubeSpatialObj ect

7. Spatial Objects
itk::ImageSpatialObject
itk::Image

8. Spatial Objects
itk::MeshSpatialObject
itk::Mesh

9. At the Beginning...
SpatialObject
Region of Space P
Is P Inside ?

10. Spatial Objects
The
Bounding
Box

11. Spatial Objects
The
Bounding
Box
Time
Space

12. Spatial Objects
Time T2 T1
Space

13. Spatial Objects
Time
The
Bounding
Box T2 ? T1
Space

14. We are all connected...
Human
Arm
Liver
Hand
Forearm
Vasculature

15. Scene Graphs... Surgery Table CT Scan 1 Ultrasound MRI - A Mesh 1
Transform
Transform
CT Scan 1
Ultrasound
Transform
Transform
Transform
MRI - A
Mesh 1
Contour

16. Scene Graphs...
Surgery Table 3D
Transform
Ultrasound 2D

17. Scene Graphs...
Is it a TREE ?
Is it a GRAPH ?

18. We want Numbers ! FILTER Parameters (intensity, Shape, Statistics,
speed,...
FILTER
Spatial
Objects

19. We want Numbers ! Spatial Objects Label Maps Label Maps Parameters
FILTER
Spatial
Objects
Label
Maps
FILTER
Label
Maps
Parameters

20. Time is more than an Illusion...
Spatio
Temporal
Objects
Spatial
Objects

21. Time is more than an Illusion...
(x, y, z, t )

22. Time is more than an Illusion...
itk::Point
At time T...

23. Time is more than an Illusion...
itk::SpatialObject
At time T...

24. Time is more than an Illusion...
itk::SpatialObject
Or Across Time...

25. Mikowsky Diagrams...
Time
(x,y,z,t)
Space

26. Mikowsky Diagrams...
Time
History of a 3D object
(x,y,z,t)
Space

27. Mikowsky Diagrams... Time Space Interpolate in Space and Time
(x,y,z,t)
Space

28. Mikowsky Diagrams... Time Space or... Is this a Single 3D+t object ?
(x,y,z,t)
Space

29. The Time Continuum... Spatial Object Time 1 Spatial Object Time 2
Time Interpolation ?

30. Topological Changes
Time
Cellular
Mitosis
(x,y,z,t)
Space

31. Topological Changes
Time
How to
Interpolate ?
(x,y,z,t)
Space

32. Topological Changes
Time
Cellular
Fusion
(x,y,z,t)
Space

33. Topological Changes
Time
How to
Interpolate ?
(x,y,z,t)
Space

34. End

35. Discussion Model to image registration
Optimize over SO, shape parametes
Moving from App level representation towards the lower level in ITK (e.g. to share among apps such as V3D, GoFigure,...)
Create a itk::GraphObject ?
Use Boost graph library ? (as a module)
Nick wrote one...(at the time we didn't want Boost..)
Data in nodes & data in edges (e.g. transforms)..

36. Discussion What information to put in Nodes ? What to put in Edges ?
How to manage IO ?
get it from boost ?
Use graphviz ?
ItkGraphObject
Nodes → Template argument
Edge →

37. Discussion What information to put in Nodes ? What to put in Edges ?
How to manage IO ?
get it from boost ?
Use graphviz ?
ItkGraphObject
Nodes → Template argument
Edge →