Segmentation Metric Explorer

Perturb a predicted mask by dilation, erosion, shift and holes, and see which metrics notice.

Dice
Jaccard
Hausdorff
evaluation

Dice

1.000

Jaccard

1.000

Hausdorff (px)

0.000

Mask comparison

Green = reference only, gold = perturbed only, yellow-orange = overlap.

Segmentation metrics

Metric table

Metric	Value
Dice	1.000
Jaccard	1.000
Hausdorff (px)	0.000
HD95 (px)	0.000
ASSD (px)	0.000
Volume change (%)	0.000

Overlap and distance metrics disagree by design

A pure translation can preserve Dice almost exactly while moving every boundary point, driving Hausdorff up. A pure dilation preserves position but inflates volume, driving Dice/Jaccard down while leaving Hausdorff small. Reporting a single number hides whichever failure mode it is insensitive to — try to find a perturbation with high Dice but high Hausdorff distance.

Preparing the simulation…