Worst-Case Local Boundary Precision in Global Measures of Segmentation Reproducibility
Bibliographic record
Abstract
The commonly used measures for reproducibility of semiautomatic/interactive image segmentation algorithms provide global estimates of the precision of the location of an object boundary in a group of segmentations. The joint Dice similarity coefficient, joint Tanimoto coefficient, generalized Tanimoto coefficient, coefficient of variation of volume, and intra-class correlation coefficient of volume are interpreted with respect to a new explicit measure of worst-case local object boundary precision. Experiments established 95% confidence intervals on this new measure for ranges of global reproducibility measures allowing global measures to be interpreted in terms of worst-case local precision. Joint Tanimoto coefficient and joint Dice coefficient are shown to be highly unstable over variations in the number of segmentations being compared. All of the existing measures of segmentation reproducibility are found to be flawed in a significant way with the exception of the generalized Tanimoto coefficient.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.057 | 0.272 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.002 | 0.002 |
| Bibliometrics | 0.005 | 0.005 |
| Science and technology studies | 0.001 | 0.005 |
| Scholarly communication | 0.004 | 0.006 |
| Open science | 0.003 | 0.004 |
| Research integrity | 0.003 | 0.002 |
| Insufficient payload (model declined to judge) | 0.001 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".