Scoring Functions for Edges and Edge Pairs

A Caliper tool supports the following scoring functions for edges and edge pairs:

Scoring Function	Example
Contrast Stronger edges score higher than weaker edges. Mapped scores ignore the position and polarity of the edge within the projection region. To give lower-contrast edge scores higher mapped scores, set xc > x1 > x0.
Position Edges or edge pairs close to the center of the projection region score higher than edges or pairs that are farther away. To give centered edges or edge pairs lower scores than off-center edges or edge pairs, set x0 > x1 > xc.
PositionNeg Edges or edge pairs are scored by their position within the search region, relative to its center. Unlike the Position scoring function, this method uses the signed distance of the edge or edge pair from the center of the caliper region. To give edges with positive distances higher scores than edges with negative distances, set x0 > x1 > xc.

Scoring Function

Example

Contrast

Stronger edges score higher than weaker edges. Mapped scores ignore the position and polarity of the edge within the projection region.

To give lower-contrast edge scores higher mapped scores, set xc > x1 > x0.

Position

Edges or edge pairs close to the center of the projection region score higher than edges or pairs that are farther away.

To give centered edges or edge pairs lower scores than off-center edges or edge pairs, set x0 > x1 > xc.

PositionNeg

Edges or edge pairs are scored by their position within the search region, relative to its center. Unlike the Position scoring function, this method uses the signed distance of the edge or edge pair from the center of the caliper region.

To give edges with positive distances higher scores than edges with negative distances, set x0 > x1 > xc.