2013 Summer Project Week:Parameter heirarchy

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  Projects List

Key Investigators

• Queen's: Adam Rankin
• Queen's: Andras Lasso
• Queen's: Tamas Ungi

Objective

The goal is to develop a module that creates and utilizes a new hierarchy based on definable parameters. This will allow us to characterize data by time.

Approach, Plan

• Review existing time hierarchy discussion
• Learn technical details about hierarchies
• Discuss architecture of a flexible, abstract parameter hierarchy
• Implement said hierarchy

Progress

• Discussed approach to be taken, concerns regarding performance
• Node count can explode into the thousands, performance analysis needed
  • Initial test performance analysis run, results concerning
    • Create hierarchies with 1500 and 7000 nodes, observed
    • Create hierarchy with 250 * 5 (1 volume, 4 transforms per frame) nodes
      • Slider in widget tied to logic to replace current view volume contents with the contents of the frame indexed by slider value
        • Deep copy used
      • Allocate nodes, add to scene ~25 seconds
      • Able to drag slider, occasional stuttering
      • i7-2640M, 6GB RAM, 2nd gen SSD
      • Run1_250
      • Run2_250
      • Run3_500
      • 1000 nodes still going... maxed out physical memory [Run4_1000]

To do:

• Implement importer/exporter for MHA
• Discuss approach to performance, currently performance features are optional

Delivery Mechanism

This work will be delivered to the NA-MIC Kit as a Slicer module in the SlicerIGT extension.

References

• PLUS Toolkit
• Slicer IGT