Agenda&Status 022208

Project Management

• ITK 3.6 on March 2008
  • http://www.itk.org/Wiki/ITK_Release_Schedule#Release_3.6_Schedule

Technical Topics

• .hdr/.img file format extensions map to 3 different interpretations in ITK. (Hans)
  • What should the correct version be?

IO that can write .hdr/.img files	Orientation	bytes in .hdr	Analyze^TM Program can read ITK written files correctly	ITK can read Analyze^TM written files correctly	Files tagged as nifti compliant
niftiImageIO (2 file nifti)	Quaternions	352	No	N/A	Yes
niftiImageIO ("Analyze")	SPM Style	348	Only if transverse orientation	Yes	Yes
AnalyzeImageIO	Mayo Clinic	348	Yes	Yes	No

• • Proposal:
    • 1. Place AnalyzeIO before niftiIO in reading/writing order
    • 2. Ensure that AnalyzeIO "CanRead" mechanism rejects files that are tagged as "Nifti Compliant"
    • 3. niftiImageIO Add member function that turn on/off the ability to recognize ".hdr/.img" extensions as valid for writing (Only useful when niftiImageIO is explicitly specified for writing.). Add member function to specifify which "2 file .hdr/.img" form should be used for writing (2 file nifti or Analyze).
    • 4. default niftiImageIO to not recognize ".hdr/.img" as valid for writing.

• Improvements to MattesMutualInformation (Matt,Luis)
  • Removing the JointPDFDerivatives array
    • It used a 3D array of floats, of size : (Number of transform parameters) X (number of histogram bins)^2
• Improving LevelSet filters to use image spacing (Luca)
  • Dealing with fudge factor

Bug Triage

• Starting after: 4559