// Do not take in account matching score below this when two ellipses are matched.
let matchingScoreThreshold1 = 0.6
-// All ellipsee with a score below this is removed.
+// All ellipses with a score below this are removed.
let matchingScoreThreshold2 = 2.
type private EllipseScoreFlaggedKd (matchingScore: float, e: Ellipse) =