Engineering:TCON 01 05 2006 SlicerDataModel

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Home < Engineering:TCON 01 05 2006 SlicerDataModel

Attendants

  • Bill Lorensen, GE
  • Steve Pieper, Isomics
  • Alex Yarmarkovich, BWH
  • Mike Halle, BWH
  • Mathieu Malaterre, Kitware
  • Luis Ibanez, Kitware
  • Xiaodong Tao, GE

Topics

Make MRML independent of ITK, VTK or any other toolkit

  • MRML API shouldn't use ITK or VTK types.
  • Use type descriptors (e.g. strings) plus binary blocks to store/retrieve from the data model.
  • Use auxiliary libraries for converting the binary blocks into toolkit specific types.
    • MRML-VTK set of factories: to convert binary blocks into VTK classes.
    • MRML-ITK set of factories: to convert binary blocks into ITK classes.
    • MRML-Generic set of factories: to convert binary blocks into raw data types (e.g. array of chars).
  • Use another factory mechanism to handle management of the data blocks (e.g. a factory that manages images and polydata using VTK).
  • How to serialize the content of ITK/VTK classes, and deserialize them.
  • Maybe register the (ITK/VTK...) factories with the main MRML library.

How to deal with MetaData

  • Avoid MetaData that can be recomputed from the data (avoid redundancy).

Wrapping MRML for Tcl and Python

  • Bill suggests to write MRML as we wish, and then add vtk wrappers to it. Just like the VTKITK wrappers.

Symbolic Path Mechanism in MRML

  • How to implement in this context.
  • Issue on how to maintain the symmetry of Reading/Writing external files.

How to represent the Transforms

  • Avoid the current limitation of having only linear transforms
  • How to deal with composed transforms
    • Tradeoff between flexibility / speed / accuracy
    • Does MRML needs to know about the details of the transforms ?
  • Split a Transform library ? independent of ITK and VTK ?

Avoid Templates

  • The basic MRML type is a binary block of data