Progress Report

September 27^th, 2005

Overview

• Modification of the thesis plan
• Slight corrections in the ISBI submission plan
• Discussion about sensitivity plots and errors
• Initial implementation of sensitivity
  • sensitivity in model-based evaluation
  • sensitivity in overlap-based evaluation
• Papers of interest
• Various upcoming conferences

ISBI Submission Plan

• Modified since the last meeting
• A few sections removed
• Renaming and re-ordering as previously agreed
• ISBI Structure Plan (PDF)

Thesis Structural Outline

• Modified since the last meeting
• Expansion of points
• Shifting of sections as to make order of appearance more rational
• Thesis Structure Plan (PDF)

Sensitivity and Error Calculation

• Short document which explains why and how sensitivity plots are generated
• Notes from a recent discussion
• Initial implementation is in place
• Still room for changes and corrections
• Errors in Sensitivity (PDF)

Revised Evaluation Plots with Errors

• Recalculated of the errors as agreed
• Judgement by eyesight:
  • as shuffle radius is increased, errors decrease in both cases
  • We can expect shuffle distance of size 7x7 to be the most sensitive

Generalisation and Error Bars

Generalisation ability plot with error bars re-calculated in accordance with last meeting

Specificity and Error Bars

Specificity plot with error bars re-calculated in accordance with last meeting

Sensitivity Plots - Model-Based

• Sensitivity is shown for a variety of model-based evaluations
• Must take a second look at the errors being computed (take with a grain of salt)
• It is suggested that the errors should be ignored for the time being
• Can apply the code to both overlap- and model-based measures, plotting them in tandem when/if necessary

Sensitivity of Generalisation with Error Bars

Sensitivity of Generalisation ability

Sensitivity of Specificity with Error Bars

Sensitivity of Specificity ability

Sensitivity Plots - Overlap-Based

• Sensitivity for overlap-based evaluations
• No errors are shown yet
• Measures were more sensitive not quite where we had expected
• Overlap is formulated to have opposite trends to that of shuffle distance (i.e. error, discrepancy)
• Hence, ought to be looked at 'in reverse'

Sensitivity of Overlap without Error Bars

Sensitivity of overlap-based evaluation

Papers of Interest/Relevance

• Most relevant ones appear in a recent issue of TMI:
  • Zagrodsky, V. Walimbe, V. Castro-Pareja, C.R. Qin, J.X. Song, J.-M. Shekhar, R. - Registration-Assisted Segmentation of Real-Time 3-D Echocardiographic Data Using Deformable Models
  • Beichel, R. Bischof, H. Leberl, F. Sonka, M. - Robust Active Appearance Models and Their Application to Medical Image Analysis
  • VandeKraats, E.B. Penney, G.P. Tomazevic, D. VanWalsum, T. Niessen, W.J. - Standardized Evaluation Methodology for 2-D/3-D Registration

Conferences - Links, Locations, and Deadlines

• ISBI 2006, Virginia, USA, 1 November 2005
• CVPR 2006, New York, USA, 7 November 2005
• ICPR 2006, Hong Kong, 15 December 2005
• MICCAI 2006, Denmark, 10 March 2006

Next Steps

• Document planning or pending submissions
  • MIAS-IRC - a 2-page paper by October 24^th
  • ISBI submission - November deadline
  • Thesis structure expansion
• Implementation of sensitivity errors
• Absence of 10 days (summer vacation)
• Long term:
  • Journal paper
  • Thesis chapters