TubeTK/Events/2010.10.26

Danielle

• Computed weighting term between anisotropic and diffusive regularization = exponential decay as a function of distance to the closest polydata point
• Registration works!

Sliding organ registration

• Sliding tubes:
  • Section of top tube moves 4 pixels to the right, section of bottom tube moves 4 pixels to the left

Original fixed image: Original moving image:

Organ borders: Border normals:

Motion field, no regularization: Transformed moving image:

Motion field, diffusive regularization: Transformed moving image:

Motion field, anisotropic diffusive regularization: Transformed moving image:

• Sliding blocks:
  • Top block moves 6 pixels to the right, bottom block moves 6 pixels to the left

Original fixed image: Original moving image:

Organ borders: Border normals:

Motion field, no regularization: Transformed moving image:

Motion field, diffusive regularization: Transformed moving image:

Motion field, anisotropic diffusive regularization: Transformed moving image:

• • Problem: corners within the fixed image do not have motion vectors, leading to problems in the transformed moving image
  • Why? --> Because surface normals are discontinuous at corners...

+ Writing paper, due Thursday

Questions

• Better way to find distance from a point to a polydata?

Romain

• Implementation on the ComputeTortuosity module (only Distance Metric)
  • debugging ++++++

• Future
  • More debugging!
  • #tube command
  • Implementation of the other 2 methods : ICM SOAM